Esbuild svg symbol plugin

Inspired logic for Esbuild runtime loading and rendering of SVG as symbols from SVG sprite loader. Contain only runtime part, not sprite extraction.

Table of contents

• Why it's cool
• Installation
• Configuration
  • esModule
  • Runtime configuration
    • spriteModule
    • symbolModule
    • runtimeGenerator
• License
• Credits

Why it's cool

• Minimum initial configuration. Most of the options are configured automatically.
• Runtime for browser. Sprites are rendered and injected in pages automatically, you just refer to images via <svg><use xlink:href="#id"></use></svg>.
• Isomorphic runtime for node/browser. Can render sprites on server or in browser manually.
• Customizable. Write/extend runtime module to implement custom sprite behaviour. Write/extend runtime generator to produce your own runtime, e.g. React component configured with imported symbol.

Installation

npm install esbuild-svg-symbol-plugin -D
# via yarn
yarn add esbuild-svg-symbol-plugin -D

Configuration

// esbuild
esbuild.build({
    entryPoints: ['src/index.js'],
    bundle: true,
    outfile: 'dist/bundle.js',
    plugins: [
        svgSymbolLoaderPlugin(config) // options are documented below
    ],
}).catch(e => (console.error(e), process.exit(1)))

esModule (default true, autoconfigured)

Generated export format:

• when true loader will produce export default ....
• when false the result is module.exports = ....

By default depends on used webpack version: true for webpack >= 2, false otherwise.

Runtime configuration

When you require an image, loader transforms it to SVG <symbol>, adds it to the special sprite storage and returns class instance that represents symbol. It contains id, viewBox and content (id, viewBox and url in extract mode) fields and can later be used for referencing the sprite image, e.g:

import twitterLogo from './logos/twitter.svg';
// twitterLogo === SpriteSymbol<id: string, viewBox: string, content: string>
// Extract mode: SpriteSymbol<id: string, viewBox: string, url: string, toString: Function>

const rendered = `
<svg viewBox="${twitterLogo.viewBox}">
  <use xlink:href="#${twitterLogo.id}" />
</svg>`;

or for dynamic imports:

const dynamicIcon = await import(`./logos/${icon}.svg`);
const rendered = `
<svg viewBox="${dynamicIcon.viewBox}">
<use xlink:href="#${dynamicIcon.id}" />
</svg>`;

When browser event DOMContentLoaded is fired, sprite will be automatically rendered and injected in the document.body. If custom behaviour is needed (e.g. a different mounting target) default sprite module could be overridden via spriteModule option. Check example below.

spriteModule (autoconfigured)

Path to sprite module that will be compiled and executed at runtime. By default it depends on target webpack config option:

• esbuild-svg-symbol-plugin/runtime/browser-sprite.build for 'web' target.
• esbuild-svg-symbol-plugin/runtime/sprite.build for other targets.

If you need custom behavior, use this option to specify a path of your sprite implementation module. Path will be resolved relative to the current webpack build folder, e.g. utils/sprite.js placed in current project dir should be written as ./utils/sprite.

Example of sprite with custom mounting target (copypasted from browser-sprite):

import BrowserSprite from 'svg-baker-runtime/src/browser-sprite';
import domready from 'domready';

const sprite = new BrowserSprite();
domready(() => sprite.mount('#my-custom-mounting-target'));

export default sprite; // don't forget to export!

symbolModule (autoconfigured)

Same as spriteModule, but for sprite symbol. By default also depends on target webpack config option:

• svg-baker-runtime/browser-symbol for 'web' target.
• svg-baker-runtime/symbol for other targets.

runtimeGenerator

Path to node.js script that generates client runtime. Use this option if you need to produce your own runtime, e.g. React component configured with imported symbol.

License

See LICENSE

Credits

Huge thanks for all this people.