Quasar App Extension custom-extra-icons

A Quasar Framework extension that allows you to convert SVG icons into a Quasar-compatible format and use them in your application.

Features

• Convert SVG icons to Quasar-compatible format
• Custom icon prefixing
• Style transformation through flexible filters
• Automatic conversion during development
• Simple integration with Quasar applications
• Control over icon size and color as defined in Quasar documentation

Inspiration & Acknowledgements

This extension was inspired by the excellent quasar-extras-svg-icons project. We studied their approach to SVG conversion and icon management within the Quasar ecosystem to build this extension. If you're looking for a pre-built collection of SVG icons already converted to Quasar format, their package is highly recommended.

Installation

quasar ext add custom-extra-icons

Quasar CLI will download the extension from the NPM registry and install it in your project.

Configuration

After installing the extension, a configuration file custom-extra-icons.config.js will be created in the root directory of your project:

export default {
  // Directory with SVG icons (relative to project root)
  sourceDir: 'src/assets/custom-extra-icons',

  // Output file path for converted icons
  outputPath: 'src/custom-extra-icons',

  // Icon prefix
  iconPrefix: 'app',

  // Run automatically in beforeDev hook
  runInBeforeDev: true,

  // Filters for SVG styles
  // Can be:
  // 1. Function: (styles) => modifiedStyles
  // 2. Array of objects: [{ from: /regex/ or 'string', to: 'replacement' }]
  stylesFilter: [
    // Default filters convert black fills to currentColor
    { from: /fill:#000000;/g, to: 'fill:currentColor;' },
    { from: /fill:#000;/g, to: 'fill:currentColor;' },
    { from: /fill:black;/g, to: 'fill:currentColor;' },
  ],
}

Configuration Options

| Option | Type | Default | Description | | ---------------- | -------------- | ------------------------------- | ---------------------------------------------------------------------- | | sourceDir | String | 'src/assets/custom-extra-icons' | Path to the directory with source SVG icons (relative to project root) | | outputPath | String | 'src/custom-extra-icons' | Path to save converted icons | | iconPrefix | String | 'app' | Prefix for icon names | | runInBeforeDev | Boolean | true | Whether to automatically run icon conversion during development | | stylesFilter | Array/Function | See above | Filters for SVG styles |

stylesFilter

The stylesFilter option allows you to customize the transformation of SVG icon styles before conversion. It can be:

1. An array of objects with from and to fields, where:

   • from: can be a string or regular expression
   • to: replacement string

   Examples:

   Using plain strings (default):

   stylesFilter: [
     { from: 'fill:#000000', to: 'fill:currentColor' },
     { from: 'fill:red', to: 'fill:blue' },
   ]

   Using regular expressions with global flag (/g):

   stylesFilter: [{ from: /fill:#FF0000;/g, to: 'fill:currentColor;' }]

   Using regular expressions without global flag:

   stylesFilter: [{ from: /fill:#FF0000;/, to: 'fill:currentColor;' }]

   The difference between regex options:

   • With /g flag: All occurrences of the pattern in a style string will be replaced
   • Without /g flag: Only the first occurrence of the pattern will be replaced
   • With string values: Simple string replacement (without regex capabilities)

2. A function that takes a style string and returns a modified string:

   stylesFilter: (styles) => styles.replace(/stroke-width:2;/g, 'stroke-width:1.5;')

By default, stylesFilter converts black fills to currentColor, which allows you to use the text color as the icon color.

Usage

Automatic Conversion

By default, the extension will automatically convert your SVG icons when you start the development server with quasar dev. This behavior is controlled by the runInBeforeDev configuration option.

Manual Conversion

You can also manually trigger the icon conversion process using the Quasar CLI:

quasar run custom-extra-icons convert-icons

This is useful when you:

• Have disabled automatic conversion (runInBeforeDev: false)
• Want to update icons without restarting the development server
• Need to troubleshoot icon conversion issues

Creating SVG Icons

1. Create a directory for SVG icons (default is src/assets/custom-extra-icons).
2. Add SVG files to this directory.

Using in Quasar Components

Option 1: Using Options API

<template>
  <q-icon :name="appIconName" />
</template>

<script>
import { appIconName } from 'src/custom-extra-icons'

export default {
  setup() {
    return {
      appIconName,
    }
  },
}
</script>

Option 2: Using Composition API with script setup

<template>
  <q-icon :name="appIconName" />
</template>

<script setup>
import { appIconName } from 'src/custom-extra-icons'
</script>

Controlling Size and Colors

Once converted, your icons work just like any other Quasar icon, which means you can control:

• Size: Using CSS or the size prop (xs, sm, md, lg, xl, or specific pixel values)
• Color: Using color classes or the color prop

Example:

<template>
  <!-- Using props -->
  <q-icon :name="appIconName" size="2rem" color="primary" />

  <!-- Using classes -->
  <q-icon :name="appIconName" class="text-2xl text-secondary" />
</template>

For more information on controlling icon size and colors, see the Quasar Icon documentation.

Conversion Limitations

Not all SVG icons can be successfully converted to the Quasar format. Some limitations include:

• SVGs using advanced features like <use>, <mask>, <clipPath>, etc.
• SVGs with <linearGradient> or <radialGradient> elements
• SVGs with embedded CSS or complex style attributes
• SVGs with animations or scripts

These limitations were also documented in the quasar-extras-svg-icons repository, which provided valuable insights into the challenges of SVG conversion for Quasar.

Troubleshooting

Common Issues

• Icons Not Found: Make sure your SVG files are in the correct directory (sourceDir in the config)
• Conversion Errors: Check that your SVG files are valid and don't contain unsupported features
• Icons Not Showing: Verify that you're importing the icons correctly and using the proper name format

Debug Tips

If you're having trouble with icon conversion, you can check:

1. The console output during development for conversion errors
2. The generated files in your outputPath directory
3. The SVG source files for any non-standard elements or attributes

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Uninstallation

quasar ext remove custom-extra-icons

License

This project is licensed under the MIT License - see the LICENSE file for details.