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gulp-embed-svg

NPM

npm version CircleCI

Gulp plugin to inline/embed SVG images into html files.

Features

  • Inline/embed any images with an SVG source attribute (i.e. <img src="some.svg">) and <svg> tags with a src attribute (i.e. <svg src="some.svg">).

  • Preserves all/select attributes via RegEx.

  • Optionally create a spritesheet from the inlined SVGs.

Installation

npm i --save-dev gulp-embed-svg

Quick Start

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg())
    .pipe(gulp.dest('dist/')));

This gulp task will inline/embed any images with an SVG source attribute (i.e. <img src="some.svg">) and <svg> tags with a src attribute.

Options

  • attrs: Provide a regular expression to transfer select attributes from matched tags to embedded <svg>s.
  • createSpritesheet: Set to true to embed SVGs via a spritesheet. This reduces generated HTML filesize if you use the same SVG several times on a page.
  • decodeEntities: Set to true to decode HTML entities within the document.
  • root: Provide the root folder where SVG source images are located.
  • selectors: Provide custom CSS selectors to specify which tags should be replaced by embedded SVGs.
  • spriteIdFn: Customize the id assigned to the sprites by providing a function that resolves path and index to a string.
  • spritesheetClass: Customize the CSS class assigned to the generated spritesheet.
  • xmlMode: Whether or not to read files in xml mode.

selectors string | Array<string>

Provide custom CSS selectors to specify which tags should be replaced by embedded SVGs.

default: ['img[src$=".svg"]', 'svg[src$=".svg"]']

All <img> and <svg> tags with an svg source.

Example: Only embed tags with a specific class

HTML layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg src="github-icon.svg" class="inline-svg"></svg>
    <img src="other-icon.svg" />
    <!-- ... -->
  </body>
</html>

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      selectors: '.inline-svg' // only replace tags with the class inline-svg
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg class="inline-svg"><!-- svg markup from github-icon.svg --></svg>
    <img src="other-icon.svg" />
    <!-- ... -->
  </body>
</html>

attrs string | RegExp

Provide a regular expression to transfer select attributes from matched tags to embedded <svg>s.

Attention: Attributes from matched tags take precedence over corresponding attributes in the source .svg file.

default: ^(?!src).*$

Transfer/preserve any attribute but src.

Example: Preserve/transfer specific attribute

HTML layout

<html>
<head><!-- ... --></head>
<body>
  <!-- ... -->
  <svg src="github-icon.svg" class="icon"></svg>
  <!-- ... -->
</body>
</html>

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      attrs: /class/ // only transfer/preserve class attribute
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg class="icon"><!-- svg markup from github-icon.svg --></svg>
    <!-- ... -->
  </body>
</html>

decodeEntities boolean

Set to true to decode HTML entities within the document.

default: false

Example: Replace potential entities in document with html entities

HTML layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <span>Foo © bar 𝌆 baz ☃ qux</span>
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
  </body>
</html>

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      decodeEntities: true
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <span>Foo &#xA9; bar &#x1D306; baz &#x2603; qux</span>
    <svg class="icon"><!-- svg markup from github-icon.svg --></svg>
    <!-- ... -->
  </body>
</html>

root string

Provide the root folder where SVG source images are located.

default: __dirname

The folder in which the task is executed.

Example: Alternate svg root

HTML layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
  </body>
</html>

Folder structure

  /src
    index.html
    gulpfile.js
    /assets
      github-icon.svg

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      root: './assets'
    }))
    .pipe(gulp.dest('dist/')));

createSpritesheet boolean

Set to true to embed SVGs via a spritesheet. This reduces generated HTML filesize if you use the same SVG several times on a page.

default: false

Attention: If your SVGs contain gradients, please make sure their respective id attribute values are unique among all gradients that are embedded on your page. The reason behind this is that, in order to support most (if not all) browsers, we need to extract gradient definitions from the SVGs and save them separately in the spritesheet. If there are duplicate gradient ids, the browser is having a hard time determining which one to use.

Example: Create an svg spritesheet

HTML Layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
  </body>
</html>

Folder structure

  /src
    index.html
    gulpfile.js
    /assets
      github-icon.svg

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      root: './assets',
      createSpritesheet: true
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <svg class="svg-sprites">
      <symbol id="svg-sprite-0">
        <!-- source of github-icon.svg -->
      </symbol>
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#svg-sprite-0">
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#svg-sprite-0">
    </svg>
    <!-- ... -->
  </body>
</html>

spritesheetClass string

Customize the CSS class assigned to the generated spritesheet.

default: svg-sprites

Example: Change spritesheet class to my-sprites

HTML Layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
  </body>
</html>

Folder structure

  /src
    index.html
    gulpfile.js
    /assets
      github-icon.svg

Gulp task

const embedSvg = require('gulp-embed-svg');

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      root: './assets',
      createSpritesheet: true,
      spritesheetClass: 'my-sprites'
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <svg class="my-sprites">
      <symbol id="svg-sprite-0">
        <!-- source of github-icon.svg -->
      </symbol>
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#svg-sprite-0">
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#svg-sprite-0">
    </svg>
    <!-- ... -->
  </body>
</html>

spriteIdFn function

Customize the id assigned to the sprites by providing a function that resolves path and index to a string. The function receives the absolute/resolved path to the source SVG file as well as the index of the sprite within the page as parameters.

default: (path, i) => `svg-sprite-${i}`

Example: Use the filename as id

HTML Layout

<html>
  <head><!-- ... --></head>
  <body>
    <!-- ... -->
    <svg src="github-icon.svg"></svg>
    <!-- ... -->
    <svg src="javascript-icon.svg"></svg>
    <!-- ... -->
  </body>
</html>

Folder structure

  /src
    index.html
    gulpfile.js
    /assets
      github-icon.svg
      javascript-icon.svg

Gulp task

const embedSvg = require('gulp-embed-svg');
const basename = require('path').basename;

gulp.task('embedSvgs', () =>
  gulp.src('*.html')
    .pipe(embedSvg({
      root: './assets',
      createSpritesheet: true,
      spriteIdFn: (path, i) => basename(path, '.svg')
    }))
    .pipe(gulp.dest('dist/')));

Output

<html>
  <head><!-- ... --></head>
  <body>
    <svg class="svg-sprites">
      <symbol id="github-icon">
        <!-- source of github-icon.svg -->
      </symbol>
      <symbol id="javascript-icon">
        <!-- source of javascript-icon.svg -->
      </symbol>
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#github-icon">
    </svg>
    <!-- ... -->
    <svg>
      <use xlink:href="#javascript-icon">
    </svg>
    <!-- ... -->
  </body>
</html>

xmlMode boolean

Flag to toggle xml mode.

default: true

Changelog

License