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  2. SVG

Como Implementar Sprites em SVG para Vários Navegadores

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David Darnes
Read Time: 20 min
SVGSketchSprites

Portuguese (Português) translation by Erick Patrick (you can also view the original English article)

Nesse tutorial, mostrarei uma implementação básica de alguns ícones em SVG, como prover uma versão alternativa e como torná-los em um sprite SVG.

Implementação Básica em SVG

Para esse tutorial, usarei uma página única, que agirá parecido com um cartão de visitas/negócios. Ele apresentará minha pessoa e mostrará três perfis de rede sociais relevante ao meu trabalho.

Ícones da flaticon

Da captura de tela acima, você pode ver que estou usando ícones (para Twitter, Dribbble e GitHub) para referenciar simbolicamente meus perfis nessas redes sociais. Baixei os ícones da flaticon, que possuir uma grande variedade de ícones & símbolos, tanto em formato vetor quanto rasterizado. 

PNG e SVG

Começaremos usando as versões PNG desses ícones, pelo fato da retro compatibilidade, e depois prepararemos as versões em SVG para usar nos navegadores que dão suporte à tecnologia.

Usei o Sketch para gerar as versões PNG dos meus ícones, então usarei ele novamente para preparar os ícones para uso no SVG.

My chosen icons in Sketch with named layers groupsMy chosen icons in Sketch with named layers groupsMy chosen icons in Sketch with named layers groups

Se prestar atenção na captura de tela acima, perceberá que nomeei, apropriadamente, todos os grupos e formas no painel do lado esquerdo (O Adobe Illustrator tem uma visão parecida no painel de Camadas). É importante nomear todos os seus recursos corretamente, uma vez que, além de ajudar a manter a organização, também ajudará na hora que formos usá-los num passo mais a frente, nesse tutorial. 

Exportando os SVGs

Agora, exportarei os ícones como SVGs, que é bem simples, usando a ferramenta de recorte (slicing tool) no Sketch. Para maiores informações sobre como isso funciona, leia: Entendendo as Opções de Exportação do Sketch. Exportarei como arquivos separados e os colocarei dentro do diretório de imagens do meu projeto.

Normalmente, para mostrar uma imagem em seu site, você a referenciaria através do atributo src de um elemento ou algo similar: 

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<img src="caminho-para-a-imagem.png" alt="" />

Entretanto, com SVG, há inúmeras formas de usá-lo dentro de um documento HTML. Por exemplo, podemos usar o código SVG diretamente na página - eis como o código se parece:

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<?xml version="1.0" encoding="UTF-8" standalone="no"?>

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<svg width="50px" height="41px" viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns">

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<!-- Generator: Sketch 3.1 (8751) - http://www.bohemiancoding.com/sketch -->

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  <title>twitter-icon</title>

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	<desc>Created with Sketch.</desc>

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	<defs></defs>

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	<g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" sketch:type="MSPage">

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		<g id="twitter-icon" sketch:type="MSLayerGroup" fill="#55ACEE">

9
 
			<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird" sketch:type="MSShapeGroup"></path>

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		</g>

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	</g>

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</svg>

Esse é um dos ícones que exportei, no formato XML. Esse código é bem parecido com o HTML (é um formato estrutural), significando que podemos colá-lo diretamente na página. 

Adicionando SVG diretamente no HTML

Comecemos com o HTML base da página, que inclui os ícones em PNG com suas âncoras e um container:

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<div class="section">

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<a href="http://twitter.com/DavidDarnes" title="Perfil do Twitter">

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    	<img alt="Twitter" width="50" height="51" src="img/twitter-icon.png">

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	</a>

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	<a href="http://dribbble.com/DavidDarnes" title="Perfil do Dribbble">

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		<img alt="Dribbble" width="50" height="51" src="img/dribbble-icon.png">

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	</a>

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	<a href="http://github.com/DavidDarnes" title="Perfil do GitHub">

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		<img alt="GitHub" width="50" height="51" src="img/github-icon.png">

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	</a>

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</div>

Agora, copiarei e colarei o código SVG, contudo, ignorarei a linha inicial, que se refere à codificação dos caracteres do arquivo, além de outros detalhes. Como o HTML já contém essa informação, não precisamos duplicá-la.

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<div class="section">

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<a href="http://twitter.com/DavidDarnes" title="Perfil do Twitter">

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	<svg width="50px" height="41px" viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns">

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		<!-- Generator: Sketch 3.1 (8751) - http://www.bohemiancoding.com/sketch -->

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		<title>twitter-icon</title>

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		<desc>Created with Sketch.</desc>

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		<defs></defs>

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		<g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" sketch:type="MSPage">

9
 
			<g id="twitter-icon" sketch:type="MSLayerGroup" fill="#55ACEE">

10
 
				<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird" sketch:type="MSShapeGroup"></path>

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			</g>

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		</g>

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		</svg>

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		<img alt="Twitter" width="50" height="51" src="img/twitter-icon.png">

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	</a>

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	<a href="http://dribbble.com/DavidDarnes" title="Perfil do Dribbble">

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		<img alt="Dribbble" width="50" height="51" src="img/dribbble-icon.png">

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	</a>

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	<a href="http://github.com/DavidDarnes" title="Perfil do GitHub">

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		<img alt="GitHub" width="50" height="51" src="img/github-icon.png">

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	</a>

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</div>

Coloquei o SVG logo acima do ícone PNG correspondente. Por hora, comentarei o código da tag do ícone em PNG para que ele não apareça ao lado da versão em SVG. 

SVG Mais Limpo

Também limparei um pouco o código do SVG. Remover atributos dos elementos é opcional, uma vez que a maioria dos trechos que estou removendo não afetarão como o SVG se comportará. Eis o antes e o depois, caso queira fazer o mesmo com o seu:

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<svg width="50px" height="41px" viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns">

2
 
<!-- Generator: Sketch 3.1 (8751) - http://www.bohemiancoding.com/sketch -->

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	<title>twitter-icon</title>

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	<desc>Created with Sketch.</desc>

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	<defs></defs>

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	<g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd" sketch:type="MSPage">

7
 
		<g id="twitter-icon" sketch:type="MSLayerGroup" fill="#55ACEE">

8
 
			<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird" sketch:type="MSShapeGroup"></path>

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		</g>

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	</g>

11
 
</svg>

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<svg width="50px" height="41px" viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg">

2
 
<g id="twitter-icon" fill="#55ACEE">

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		<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>

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	</g>

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</svg>

Veja os elementos que removi. Os elementos <title>, <desc>, e <defs> não são necessários agora, mas precisaremos deles mais tarde. Também tem alguns elementos <g> que se referem aos grupos, correspondendo aos grupos criados no documento do Sketch. Por padrão, o Sketch coloca tudo dentro de uma página, por isso o nome do elemento de grupo <g id=”Page-1”…. Você pode remover isso, uma vez que não tem uso para nós (o grupo dentro dele é bem mais importante). O Sketch dá suporte a uma opção de gerar SVGs mais limpos durante a exportação, entretanto, não há mal algum em limpar o código por conta própria.

O último ponto é remover os atributos de altura e largura dentro do próprio elemento SVG. Eles precisarão ser compensados no arquivo CSS, como mostrado abaixo:

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<svg viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg">

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<g id="twitter-icon" fill="#55ACEE">

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		<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>

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	</g>

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</svg>

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.icon {

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max-width: 40px;

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	max-height: 40px;

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	transition: .2s;

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	-webkit-filter: drop-shadow(0 1px 0 #11222d);

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}

Se seguiu todos os passos, você deve ser capaz de ver uma versão vetorizada e precisa do seu ícone, usando seu navegador. 

Dica: Verifique se o gráfico é um SVG de verdade, dando zoom, usando Command-+ (ou CTRL-+) quando visualizá-lo em seu navegador. O ícone deve permanecer preciso, independentemente da quantidade zoom.

Provendo Uma Versão Alternativa

Se estiver usando essa técnica para um serviço de terceiro, talvez esteja em dúvida qual o suporte dos navegadores para ela. SVG direto no documento é suportado por todos os navegadores, exceto pelo Internet Explorer 8 (ou anterior) e Opera Mini. O Can I Use aponta que o IE8 é usado por cerca de 4% dos usuários e o Opera Mini pro cerca de 3%. Talvez você não precise criar uma versão alternativa, porém, demonstrarei essa possibilidade.

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<a href="http://twitter.com/DavidDarnes" title="Perfil do Twitter">

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<svg viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg">

3
 
        <g id="twitter-icon" fill="#55ACEE">

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            <path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>

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        </g>

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    </svg>

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    <!-- <img alt="twitter" width="50" height="51" src="img/twitter-icon.png"> -->

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</a>

Eis um dos meus ícones em SVG dentro da página. Perceberá que o ícone original em PNG ainda está lá, comentado. Esse PNG será nossa versão alternativa. 

Removendo os Comentários

Primeiro, removerei os comentários. Agora, precisamos mover o elemento <img> para cima, para dentro do elemento <svg>, logo após o grupo que contém o ícone em SVG.

O próximo passo é envolver o elemento <img> em um elemento específico ao SVG, chamado foreignObject. Se seu navegador não é capaz de compreender a informação dentro do código do SVG, ele referenciará o “objeto externo” e, nesse caso, usará o elemento <img> dentro dele. Também devemos informar ao navegador para optar pela versão vetorizada, caso suporte. Essa é a tarefa do elemento <switch>, o qual usei para envolver tanto o grupo do SVG quanto o foreignObject. 

Eis o código atualizado:

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<a href="http://twitter.com/DavidDarnes" title="Perfil do Twitter">

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<svg viewBox="0 0 50 41" version="1.1" xmlns="http://www.w3.org/2000/svg">

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        <switch>

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            <g id="twitter-icon" fill="#55ACEE">

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                <path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>

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            </g>

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            <foreignObject>

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                <img alt="twitter" width="50" height="51" src="img/twitter-icon.png">

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            </foreignObject>

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        </switch>

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    </svg>

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</a>

Se estiver seguindo o processo e estruturando seu HTML tal qual o meu, caso o navegador usado não dê suporte a vetores, ele deverá usar a versão rasterizada no lugar.

Criando um Sprite em SVG

Sprites em SVG agem da mesma forma que sprites de imagens. De forma simples, sprites são coleções de elementos gráficos combinados em uma única imagem. Cada imagem é escolhida através do uso do CSS e HTML, geralmente, especificando coordenadas e a área de visualização. 

Os principais benefícios disso são o tempo de carregamento aprimorado da página, melhor fluxo de trabalho e consistência entre os elementos gráficos da página. Os segundo e terceiro pontos aplicam-se muito bem aos sprites em SVG. Ao invés de vários blocos de código SVG injetados diretamente na página, teríamos apenas um único lugar para atualizar nossos SVGs.

Para começar, criarei um novo elemento <svg> dentro do elemento <head> da minha página, logo antes da tag de fechamento desse elemento. Esse novo SVG guardará todos os ícones anteriormente colocados na página.

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<!doctype html>

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<html lang="en">

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<head>

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		<meta charset="utf-8" />

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		<title>David Darnes - Web Designer &amp; Front-end Developer</title>

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		<link rel="stylesheet" type="text/css" href="style.css" />

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		<!--[if IE]>


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			<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>


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		<![endif]-->

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		<svg version="1.1" xmlns="http://www.w3.org/2000/svg">

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		</svg>







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	</head>








Depois, precisarei mover os ícones para dentro dele. Não preciso mover todo o SVG, apenas o grupo do elemento e seu conteúdo. Dessa forma, posso empilhá-los dentro do elemento <svg> recém criado. 







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<!doctype html>







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<html lang="en">







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<head>







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		<meta charset="utf-8" />







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		<title>David Darnes - Web Designer &amp; Front-end Developer</title>







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		<link rel="stylesheet" type="text/css" href="style.css" />







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		<!--[if IE]>








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			<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>








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		<![endif]-->







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		<svg display="none" version="1.1" xmlns="http://www.w3.org/2000/svg">







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			<g id="twitter-icon" fill="#55ACEE">







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			</g>







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			<g id="dribbble-icon">







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				<path d="M25.0002551,0 C11.1927551,0 0.000255102041,11.1925 0.000255102041,25 C0.000255102041,38.8075 11.1927551,50 25.0002551,50 C38.8077551,50 50.0002551,38.8075 50.0002551,25 C50.0002551,11.1925 38.8077551,0 25.0002551,0 L25.0002551,0 L25.0002551,0 Z" id="ball" fill="#EA4C89"></path>







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			</g>







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			<g id="github-icon" fill="#161614">







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				<path d="M0,25.633467 C0,36.9584555 7.1625894,46.5651047 17.0969029,49.954576 C18.3477086,50.1906116 18.8035237,49.3991056 18.8035237,48.719323 C18.8035237,48.1119247 18.7820375,46.4990147 18.7697597,44.3605321 C11.8158937,45.9089257 10.3486909,40.9238537 10.3486909,40.9238537 C9.21145523,37.9623936 7.57236256,37.1740347 7.57236256,37.1740347 C5.30249547,35.5847282 7.74425243,35.6161996 7.74425243,35.6161996 C10.2535376,35.7971603 11.5734062,38.2582249 11.5734062,38.2582249 C13.8033703,42.1748424 17.4253353,41.0434451 18.8495657,40.3872661 C19.0767059,38.7318697 19.7228276,37.6020459 20.4364775,36.9616026 C14.8853556,36.314865 9.04877375,34.1150132 9.04877375,24.2927848 C9.04877375,21.494976 10.0233279,19.2054306 11.6225176,17.4147071 C11.3646828,16.766396 10.5067682,14.1589893 11.8680745,10.6310438 C11.8680745,10.6310438 13.9660518,9.9418198 18.7421345,13.2589069 C20.73575,12.6892743 22.875165,12.4060315 25.0007674,12.3950166 C27.124835,12.4060315 29.2627152,12.6892743 31.2594002,13.2589069 C36.0324135,9.9418198 38.1273213,10.6310438 38.1273213,10.6310438 C39.4916971,14.1589893 38.6337825,16.766396 38.3774824,17.4147071 C39.9797416,19.2054306 40.9466221,21.494976 40.9466221,24.2927848 C40.9466221,34.1401903 35.1008318,36.3069972 29.5328279,36.9411462 C30.4291108,37.7326523 31.2287056,39.2967816 31.2287056,41.688609 C31.2287056,45.1142725 31.198011,47.8790363 31.198011,48.719323 C31.198011,49.4053999 31.6492219,50.2032002 32.9169097,49.9530025 C42.8435495,46.5556633 50,36.9553083 50,25.633467 C50,11.4760513 38.8056724,0 24.9976979,0 C11.1943276,0 0,11.4760513 0,25.633467 Z" id="octocat"></path>







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			</g>







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		</svg>







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	</head>








Nota: Se você for acostumado a usar o Grunt, há um plugin que automatizará a união de todos seus arquivos SVGs separados.



Esconda!



Agora que temos todos nossos ícones no elemento head, temos de escondê-lo: adicionar o atributo display=”none” ao novo <svg> indicará que todos os ícones não aparecerão no topo da página.



Definindo Cada Ícone



Nosso próximo passo é definir cada ícone de modo que possamos reusá-lo na página. É aqui que os elementos defs que removemos anteriormente, voltam à ação. Ao usá-lo para envolver todos os grupos, dessa forma, envolvendo todos os ícones, sou capaz de indicar que quero reutilizá-los em outras partes da página.







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<html lang="en">







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<head>







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		<meta charset="utf-8" />







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		<title>David Darnes - Web Designer &amp; Front-end Developer</title>







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		<link rel="stylesheet" type="text/css" href="style.css" />







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		<!--[if IE]>








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			<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>








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		<![endif]-->







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		<svg display="none" version="1.1" xmlns="http://www.w3.org/2000/svg">







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			<defs>







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				<g id="twitter-icon" fill="#55ACEE">







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					<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>







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				<g id="github-icon" fill="#161614">







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					<path d="M0,25.633467 C0,36.9584555 7.1625894,46.5651047 17.0969029,49.954576 C18.3477086,50.1906116 18.8035237,49.3991056 18.8035237,48.719323 C18.8035237,48.1119247 18.7820375,46.4990147 18.7697597,44.3605321 C11.8158937,45.9089257 10.3486909,40.9238537 10.3486909,40.9238537 C9.21145523,37.9623936 7.57236256,37.1740347 7.57236256,37.1740347 C5.30249547,35.5847282 7.74425243,35.6161996 7.74425243,35.6161996 C10.2535376,35.7971603 11.5734062,38.2582249 11.5734062,38.2582249 C13.8033703,42.1748424 17.4253353,41.0434451 18.8495657,40.3872661 C19.0767059,38.7318697 19.7228276,37.6020459 20.4364775,36.9616026 C14.8853556,36.314865 9.04877375,34.1150132 9.04877375,24.2927848 C9.04877375,21.494976 10.0233279,19.2054306 11.6225176,17.4147071 C11.3646828,16.766396 10.5067682,14.1589893 11.8680745,10.6310438 C11.8680745,10.6310438 13.9660518,9.9418198 18.7421345,13.2589069 C20.73575,12.6892743 22.875165,12.4060315 25.0007674,12.3950166 C27.124835,12.4060315 29.2627152,12.6892743 31.2594002,13.2589069 C36.0324135,9.9418198 38.1273213,10.6310438 38.1273213,10.6310438 C39.4916971,14.1589893 38.6337825,16.766396 38.3774824,17.4147071 C39.9797416,19.2054306 40.9466221,21.494976 40.9466221,24.2927848 C40.9466221,34.1401903 35.1008318,36.3069972 29.5328279,36.9411462 C30.4291108,37.7326523 31.2287056,39.2967816 31.2287056,41.688609 C31.2287056,45.1142725 31.198011,47.8790363 31.198011,48.719323 C31.198011,49.4053999 31.6492219,50.2032002 32.9169097,49.9530025 C42.8435495,46.5556633 50,36.9553083 50,25.633467 C50,11.4760513 38.8056724,0 24.9976979,0 C11.1943276,0 0,11.4760513 0,25.633467 Z" id="octocat"></path>







21


				</g>







22


			</defs>







23


		</svg>







24


	</head>








Usando os Ícones



Os ícones estão definidos mas precisamos de algum método para usá-los. Essa é a tarefa do elemento use. O elemento <use> permite-nos usar qualquer elemento dentro do elemento <defs> em qualquer lugar de nossa página. A forma que usaremos para pegar os elementos é através de seus IDs. Por isso que é importante nomear nossos ícones no documento inicial do Sketch. 



Anote os IDs do exemplo acima e veja que estou referenciando cada um usando o elemento use, dessa forma <use xlink:href="#twitter-icon"></use>.







1


<div class="section">







2


<a href="http://twitter.com/DavidDarnes" title="Perfil do Twitter">







3


		<svg class="icon" viewBox="0 0 50 41">







4


			<switch>







5


				<use xlink:href="#twitter-icon"></use>







6


				<foreignObject>







7


					<img class="icon" src="img/twitter-icon.png" alt="Twitter">







8


				</foreignObject>







9


			</switch>







10


		</svg>







11


	</a>







12


	<a href="http://dribbble.com/DavidDarnes" title="Perfil do Dribbble">







13


		<svg class="icon" viewBox="0 0 50 50">







14


			<switch>







15


				<use xlink:href="#dribbble-icon"></use>







16


				<foreignObject>







17


					<img class="icon" src="img/dribbble-icon.png" alt="Dribbble">







18


				</foreignObject>







19


			</switch>







20


		</svg>







21


	</a>







22


	<a href="http://github.com/DavidDarnes" title="Perfil do GitHub">







23


		<svg class="icon" viewBox="0 0 50 50">







24


			<switch>







25


				<use xlink:href="#github-icon"></use>







26


				<foreignObject>







27


					<img class="icon" src="img/github-icon.png" alt="GitHub">







28


				</foreignObject>







29


			</switch>







30


		</svg>







31


	</a>







32


</div>








Se tiver seguido corretamente os passos, você não verá qualquer mudança nos gráficos que aparecem na página, contudo, você poderá reusá-los (em qualquer tamanho que quiser) quantas vezes quiser.



Aperfeiçoando Seu Sprite SVG



Um ponto interessante do uso de sprites SVG é que o código visível da sua página é bem limpo e pode ser lido mais facilmente por outras pessoas trabalhando com seu código. Porém, podemos aprimorar mais ainda. 



Logo abaixo, mudei os elementos <g> no meu sprite SVG pelo elemento symbol, além disso, movi o atributo viewbox dos elementos SVG na página para os novos elementos symbol.







1


<!doctype html>







2


<html lang="en">







3


<head>







4


		<meta charset="utf-8" />







5


		<title>David Darnes - Web Designer &amp; Front-end Developer</title>







6


		<link rel="stylesheet" type="text/css" href="style.css" />







7


		<!--[if IE]>








8


			<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>








9


		<![endif]-->







10


		<svg display="none" version="1.1" xmlns="http://www.w3.org/2000/svg">







11


			<defs>







12


				<symbol id="twitter-icon" viewBox="0 0 50 41" fill="#55ACEE">







13


					<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>







14


				</symbol>







15


				<symbol id="dribbble-icon" viewBox="0 0 50 50">







16


					<path d="M25.0002551,0 C11.1927551,0 0.000255102041,11.1925 0.000255102041,25 C0.000255102041,38.8075 11.1927551,50 25.0002551,50 C38.8077551,50 50.0002551,38.8075 50.0002551,25 C50.0002551,11.1925 38.8077551,0 25.0002551,0 L25.0002551,0 L25.0002551,0 Z" id="ball" fill="#EA4C89"></path>







17


					<path d="M25.0002551,-0.000510204082 C11.1927551,-0.000510204082 0.000255102041,11.1919898 0.000255102041,24.9994898 C0.000255102041,38.8069898 11.1927551,49.9994898 25.0002551,49.9994898 C38.8077551,49.9994898 50.0002551,38.8069898 50.0002551,24.9994898 C50.0002551,11.1919898 38.8077551,-0.000510204082 25.0002551,-0.000510204082 L25.0002551,-0.000510204082 L25.0002551,-0.000510204082 Z M25.0002551,3.6219898 C30.4465051,3.6219898 35.4177551,5.6594898 39.1927551,9.0119898 C36.4190051,12.6707398 32.2052551,15.1069898 27.9827551,16.7557398 C25.6815051,12.5457398 22.8477551,8.1069898 19.9640051,4.2182398 C21.5777551,3.8282398 23.2640051,3.6219898 25.0002551,3.6219898 L25.0002551,3.6219898 L25.0002551,3.6219898 Z M15.9052551,5.6482398 C18.6915051,9.8169898 21.3915051,13.6832398 23.8590051,18.0594898 C17.6202551,19.6757398 10.5727551,20.6457398 4.0615051,20.6619898 C5.4340051,14.0019898 9.9077551,8.4719898 15.9052551,5.6482398 L15.9052551,5.6482398 L15.9052551,5.6482398 Z M41.5640051,11.4844898 C44.5465051,15.1332398 46.3427551,19.7869898 46.3777551,24.8582398 C41.4327551,23.8844898 36.5140051,23.6282398 31.5077551,24.1332398 C30.9440051,22.7294898 30.2627551,21.3969898 29.6090051,19.9582398 C33.9252551,18.2169898 38.5402551,15.2369898 41.5640051,11.4844898 L41.5640051,11.4844898 L41.5640051,11.4844898 Z M25.5952551,21.3669898 C26.1302551,22.5057398 26.7502551,23.7119898 27.3315051,24.9457398 C20.3690051,28.0157398 12.9640051,32.1182398 9.1190051,39.3107398 C5.7027551,35.5219898 3.6227551,30.5019898 3.6227551,24.9994898 C3.6227551,24.7907398 3.6265051,24.5819898 3.6327551,24.3744898 C11.0890051,24.3382398 18.4077551,23.4057398 25.5952551,21.3669898 L25.5952551,21.3669898 L25.5952551,21.3669898 Z M36.8915051,27.1957398 C39.9990051,27.1857398 43.2102551,27.6194898 46.1115051,28.3832398 C45.1627551,34.3532398 41.7402551,39.5019898 36.9277551,42.7419898 C35.7802551,37.5232398 34.6865051,32.5294898 32.7527551,27.4944898 C34.0865051,27.2957398 35.4790051,27.1994898 36.8915051,27.1957398 L36.8915051,27.1957398 L36.8915051,27.1957398 Z M28.7965051,28.4719898 C30.7677551,33.5619898 32.3140051,39.1994898 33.3515051,44.6857398 C30.7852551,45.7757398 27.9640051,46.3782398 25.0002551,46.3782398 C20.0565051,46.3782398 15.5040051,44.6982398 11.8827551,41.8794898 C15.7540051,35.5982398 21.7502551,30.8457398 28.7965051,28.4719898 L28.7965051,28.4719898 L28.7965051,28.4719898 Z" id="ball-lines" fill="#C32361"></path>







18


				</symbol>







19


				<symbol id="github-icon" viewBox="0 0 50 50" fill="#161614">







20


					<path d="M0,25.633467 C0,36.9584555 7.1625894,46.5651047 17.0969029,49.954576 C18.3477086,50.1906116 18.8035237,49.3991056 18.8035237,48.719323 C18.8035237,48.1119247 18.7820375,46.4990147 18.7697597,44.3605321 C11.8158937,45.9089257 10.3486909,40.9238537 10.3486909,40.9238537 C9.21145523,37.9623936 7.57236256,37.1740347 7.57236256,37.1740347 C5.30249547,35.5847282 7.74425243,35.6161996 7.74425243,35.6161996 C10.2535376,35.7971603 11.5734062,38.2582249 11.5734062,38.2582249 C13.8033703,42.1748424 17.4253353,41.0434451 18.8495657,40.3872661 C19.0767059,38.7318697 19.7228276,37.6020459 20.4364775,36.9616026 C14.8853556,36.314865 9.04877375,34.1150132 9.04877375,24.2927848 C9.04877375,21.494976 10.0233279,19.2054306 11.6225176,17.4147071 C11.3646828,16.766396 10.5067682,14.1589893 11.8680745,10.6310438 C11.8680745,10.6310438 13.9660518,9.9418198 18.7421345,13.2589069 C20.73575,12.6892743 22.875165,12.4060315 25.0007674,12.3950166 C27.124835,12.4060315 29.2627152,12.6892743 31.2594002,13.2589069 C36.0324135,9.9418198 38.1273213,10.6310438 38.1273213,10.6310438 C39.4916971,14.1589893 38.6337825,16.766396 38.3774824,17.4147071 C39.9797416,19.2054306 40.9466221,21.494976 40.9466221,24.2927848 C40.9466221,34.1401903 35.1008318,36.3069972 29.5328279,36.9411462 C30.4291108,37.7326523 31.2287056,39.2967816 31.2287056,41.688609 C31.2287056,45.1142725 31.198011,47.8790363 31.198011,48.719323 C31.198011,49.4053999 31.6492219,50.2032002 32.9169097,49.9530025 C42.8435495,46.5556633 50,36.9553083 50,25.633467 C50,11.4760513 38.8056724,0 24.9976979,0 C11.1943276,0 0,11.4760513 0,25.633467 Z" id="octocat"></path>







21


				</symbol>







22


			</defs>







23


		</svg>







24


	</head>








Usar o elemento <symbol> não é apenas mais semântico, pelo menos nesse exemplo, também nos evita a repetição do atributo viewbox em nossos elementos <svg> e <use>. Podemos trazer de voltas os elementos title e desc que removemos e usá-los para aprimorar a acessibilidade de nossos ícones.



Nota: Tenha em mente que o conteúdo dos elementos <desc>, por padrão no IE7, são mostrados ao usuário.







1


<!doctype html>







2


<html lang="en">







3


<head>







4


		<meta charset="utf-8" />







5


		<title>David Darnes - Web Designer &amp; Front-end Developer</title>







6


		<link rel="stylesheet" type="text/css" href="style.css" />







7


		<!--[if IE]>








8


			<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>








9


		<![endif]-->







10


		<svg display="none" version="1.1" xmlns="http://www.w3.org/2000/svg">







11


			<symbol id="twitter-icon" viewBox="0 0 50 41" fill="#55ACEE">







12


				<title>Twitter</title>







13


				<desc>Twitter account</desc>







14


				<path d="M0,36.3461306 C0.803663004,36.4417973 1.62142857,36.4907387 2.45054945,36.4907387 C7.26336996,36.4907387 11.6928571,34.8346712 15.2086081,32.0564595 C10.71337,31.9727973 6.91959707,28.9779505 5.61245421,24.8624369 C6.23956044,24.9834054 6.88315018,25.0482297 7.54505495,25.0482297 C8.48205128,25.0482297 9.38956044,24.9217207 10.2516484,24.684955 C5.55201465,23.7334595 2.01117216,19.5466577 2.01117216,14.5276667 C2.01117216,14.4840811 2.01117216,14.4406802 2.01190476,14.397464 C3.3970696,15.1733243 4.98095238,15.6392838 6.66501832,15.693027 C3.90860806,13.8354685 2.09487179,10.6648018 2.09487179,7.07102252 C2.09487179,5.17264865 2.6014652,3.39321171 3.48571429,1.86328378 C8.55238095,8.13037387 16.1217949,12.2543829 24.6595238,12.6863604 C24.4844322,11.9282297 24.3934066,11.1375946 24.3934066,10.3257207 C24.3934066,4.60511261 28.9930403,-0.0328738739 34.6664835,-0.0328738739 C37.6210623,-0.0328738739 40.2908425,1.2251982 42.1648352,3.23844595 C44.5047619,2.77377928 46.7032967,1.91167117 48.6880952,0.724702703 C47.9210623,3.14351802 46.2923077,5.17357207 44.1712454,6.45565315 C46.2492674,6.20522072 48.2291209,5.6483964 50.0714286,4.82451802 C48.6941392,6.90185135 46.952381,8.72635135 44.9454212,10.1868378 C44.9652015,10.6310045 44.9750916,11.0777568 44.9750916,11.5269099 C44.9750916,25.2155541 34.6424908,41 15.7472527,41 C9.9459707,41 4.54615385,39.2852027 0,36.3461306 L0,36.3461306 Z" id="bird"></path>







15


			</symbol>







16


			<symbol id="dribbble-icon" viewBox="0 0 50 50">







17


				<title>Dribbble</title>







18


				<desc>Dribbble portfolio</desc>







19


				<path d="M25.0002551,0 C11.1927551,0 0.000255102041,11.1925 0.000255102041,25 C0.000255102041,38.8075 11.1927551,50 25.0002551,50 C38.8077551,50 50.0002551,38.8075 50.0002551,25 C50.0002551,11.1925 38.8077551,0 25.0002551,0 L25.0002551,0 L25.0002551,0 Z" id="ball" fill="#EA4C89"></path>







20


				<path d="M25.0002551,-0.000510204082 C11.1927551,-0.000510204082 0.000255102041,11.1919898 0.000255102041,24.9994898 C0.000255102041,38.8069898 11.1927551,49.9994898 25.0002551,49.9994898 C38.8077551,49.9994898 50.0002551,38.8069898 50.0002551,24.9994898 C50.0002551,11.1919898 38.8077551,-0.000510204082 25.0002551,-0.000510204082 L25.0002551,-0.000510204082 L25.0002551,-0.000510204082 Z M25.0002551,3.6219898 C30.4465051,3.6219898 35.4177551,5.6594898 39.1927551,9.0119898 C36.4190051,12.6707398 32.2052551,15.1069898 27.9827551,16.7557398 C25.6815051,12.5457398 22.8477551,8.1069898 19.9640051,4.2182398 C21.5777551,3.8282398 23.2640051,3.6219898 25.0002551,3.6219898 L25.0002551,3.6219898 L25.0002551,3.6219898 Z M15.9052551,5.6482398 C18.6915051,9.8169898 21.3915051,13.6832398 23.8590051,18.0594898 C17.6202551,19.6757398 10.5727551,20.6457398 4.0615051,20.6619898 C5.4340051,14.0019898 9.9077551,8.4719898 15.9052551,5.6482398 L15.9052551,5.6482398 L15.9052551,5.6482398 Z M41.5640051,11.4844898 C44.5465051,15.1332398 46.3427551,19.7869898 46.3777551,24.8582398 C41.4327551,23.8844898 36.5140051,23.6282398 31.5077551,24.1332398 C30.9440051,22.7294898 30.2627551,21.3969898 29.6090051,19.9582398 C33.9252551,18.2169898 38.5402551,15.2369898 41.5640051,11.4844898 L41.5640051,11.4844898 L41.5640051,11.4844898 Z M25.5952551,21.3669898 C26.1302551,22.5057398 26.7502551,23.7119898 27.3315051,24.9457398 C20.3690051,28.0157398 12.9640051,32.1182398 9.1190051,39.3107398 C5.7027551,35.5219898 3.6227551,30.5019898 3.6227551,24.9994898 C3.6227551,24.7907398 3.6265051,24.5819898 3.6327551,24.3744898 C11.0890051,24.3382398 18.4077551,23.4057398 25.5952551,21.3669898 L25.5952551,21.3669898 L25.5952551,21.3669898 Z M36.8915051,27.1957398 C39.9990051,27.1857398 43.2102551,27.6194898 46.1115051,28.3832398 C45.1627551,34.3532398 41.7402551,39.5019898 36.9277551,42.7419898 C35.7802551,37.5232398 34.6865051,32.5294898 32.7527551,27.4944898 C34.0865051,27.2957398 35.4790051,27.1994898 36.8915051,27.1957398 L36.8915051,27.1957398 L36.8915051,27.1957398 Z M28.7965051,28.4719898 C30.7677551,33.5619898 32.3140051,39.1994898 33.3515051,44.6857398 C30.7852551,45.7757398 27.9640051,46.3782398 25.0002551,46.3782398 C20.0565051,46.3782398 15.5040051,44.6982398 11.8827551,41.8794898 C15.7540051,35.5982398 21.7502551,30.8457398 28.7965051,28.4719898 L28.7965051,28.4719898 L28.7965051,28.4719898 Z" id="ball-lines" fill="#C32361"></path>







21


			</symbol>







22


			<symbol id="github-icon" viewBox="0 0 50 50" fill="#161614">







23


				<title>GitHub</title>







24


				<desc>GitHub account</desc>







25


				<path d="M0,25.633467 C0,36.9584555 7.1625894,46.5651047 17.0969029,49.954576 C18.3477086,50.1906116 18.8035237,49.3991056 18.8035237,48.719323 C18.8035237,48.1119247 18.7820375,46.4990147 18.7697597,44.3605321 C11.8158937,45.9089257 10.3486909,40.9238537 10.3486909,40.9238537 C9.21145523,37.9623936 7.57236256,37.1740347 7.57236256,37.1740347 C5.30249547,35.5847282 7.74425243,35.6161996 7.74425243,35.6161996 C10.2535376,35.7971603 11.5734062,38.2582249 11.5734062,38.2582249 C13.8033703,42.1748424 17.4253353,41.0434451 18.8495657,40.3872661 C19.0767059,38.7318697 19.7228276,37.6020459 20.4364775,36.9616026 C14.8853556,36.314865 9.04877375,34.1150132 9.04877375,24.2927848 C9.04877375,21.494976 10.0233279,19.2054306 11.6225176,17.4147071 C11.3646828,16.766396 10.5067682,14.1589893 11.8680745,10.6310438 C11.8680745,10.6310438 13.9660518,9.9418198 18.7421345,13.2589069 C20.73575,12.6892743 22.875165,12.4060315 25.0007674,12.3950166 C27.124835,12.4060315 29.2627152,12.6892743 31.2594002,13.2589069 C36.0324135,9.9418198 38.1273213,10.6310438 38.1273213,10.6310438 C39.4916971,14.1589893 38.6337825,16.766396 38.3774824,17.4147071 C39.9797416,19.2054306 40.9466221,21.494976 40.9466221,24.2927848 C40.9466221,34.1401903 35.1008318,36.3069972 29.5328279,36.9411462 C30.4291108,37.7326523 31.2287056,39.2967816 31.2287056,41.688609 C31.2287056,45.1142725 31.198011,47.8790363 31.198011,48.719323 C31.198011,49.4053999 31.6492219,50.2032002 32.9169097,49.9530025 C42.8435495,46.5556633 50,36.9553083 50,25.633467 C50,11.4760513 38.8056724,0 24.9976979,0 C11.1943276,0 0,11.4760513 0,25.633467 Z" id="octocat"></path>







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			</symbol>







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		</svg>







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	</head>








Ao alterar o elemento g por um symbol, fomos capazes de realizar todos esses aprimoramentos. Também podemos remover o elemento <defs> sprite SVG, tornando nosso código ainda mais limpo.



Conclusão



E terminamos! O que começou apenas como ícones rasterizados, tornou-se em uma solução extremamente poderosa usando ícones vetorizados, que podem ser reusados e redimensionados facilmente. Espero que tenha curtido esse tutorial e que curta brincar mais e mais com SVGs em seus próximos projetos.



Seja o primeiro a saber sobre novas traduções–siga @tutsplus_pt no Twitter!


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David Darnes
David Darnes
Bristol, UK
With over 11 years professional experience, I’ve been building up my skills in design, UI development, and front-end development, working with some really exciting people like Ghost, Stackbit, Envato Tuts+ and BaseKit.
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