@webdiscus/pug-loader

Pug Loader

Webpack loader to render Pug templates

---

Pug loader renders Pug files into HTML or compiles them into a template function. This Pug loader resolves paths and aliases for extends include require().

💡New: now is supported an indent in Vue template.

MyComponent.vue

<template lang='pug'>
  h1 Hello Pug!
  p Use the '@webdiscus/pug-loader'
</template>

Why is this Pug loader best for Vue?

Features	@webdiscus/pug-loader	pug-plain-loader
indent in <templatе lang='pug'>	✅	❌
render into HTML	✅	✅
render into template function	✅	❌
pass custom data to template	✅	❌
embedded filter :highlight	✅	❌
embedded filter :markdown	✅	❌
test coverage	> 98%	0%
last update	right now	4 years ago

See how to use Pug with Vue and source of example.

💡 Recommended to use the pug-plugin.
Pug plugin makes your life a lot easier. Keep your webpack config clean and clear.

This pug-loader is already included in the pug-plugin.
The pug-plugin enable using Pug templates as webpack entry points.
The pug-plugin resolve and compile source files of scripts and styles required in Pug, without to define them in the webpack entry. You don't need more additional plugins such as html-webpack-plugin and mini-css-extract-plugin. Pug plugin does everything by itself and much faster.

Please see usage examples and the demo app Hello World.

Contents

1. Install and Quick start
2. Options
3. Usage of methods
   • compile
   • render
   • html
4. Usage of Pug filters
   • :escape
   • :code
   • :highlight
   • :markdown
5. Passing data into Pug template
6. Usage of embedded resources
7. Usage with Angular
8. Usage with Vue
9. Recipes
10. Example Hello World!
11. Example Pug filters
12. More examples

Features

• rendereing Pug into pure HTML string
• compiling Pug into template function for usage in JavaScript
• generates a template function with both CommonJS and ESM syntax
• resolves alias from webpack resolve.alias
• resolves alias from tsconfig.json compilerOptions.paths, requires tsconfig-paths-webpack-plugin
• resolves required images in the attribute srcset of img tag
• resolves required JavaScript modules or JSON in pug
• integrated Pug filters: :escape :code :highlight :markdown with highlighting of code blocks
• passing custom data into Pug template
• watching of changes in all dependencies

---

Install and Quick start

Choose your way:

• compile Pug files defined in webpack entry using the pug-plugin. It is a very easy intuitive way.
• compile Pug files defined in the html-webpack-plugin using a pug-loader. It is non-intuitive and very complex way. Not recommended.

Using pug-plugin

For details and examples please see the pug-plugin site.

Install the pug-plugin:

npm install pug-plugin --save-dev

Note: the pug-plugin already contains the pug-loader, not need to install an additional Pug loader.

⚠️ ATTENTION

The pug-plugin enable to use script and style source files directly in Pug, so easy:

link(href=require('./styles.scss') rel='stylesheet')
script(src=require('./main.js'))

Generated HTML contains hashed CSS and JS output filenames:

<link href="/assets/css/styles.05e4dd86.css" rel="stylesheet">
<script src="/assets/js/main.f4b855d8.js"></script>

• Don't define styles and JS files in entry. You can use require() for source files of JS and SCSS in Pug.
• Don't import styles in JS. Use require() for style files in Pug.
• Don't use html-webpack-plugin to render Pug files in HTML. The Pug plugin processes files from webpack entry.
• Don't use mini-css-extract-plugin to extract CSS from styles. The Pug plugin extract CSS from styles required in Pug.

Change your webpack.config.js according to the following minimal configuration:

const path = require('path');
const PugPlugin = require('pug-plugin');

module.exports = {
  output: {
    path: path.join(__dirname, 'dist/'),
    publicPath: '/', // must be defined any path, `auto` is not supported
    // output filename of JS files
    filename: 'assets/js/[name].[contenthash:8].js'
  },

  entry: {
    // all scripts and styles can be used in Pug,
    // do not need to define JS and SCSS in the webpack entry

    // define Pug files in entry:
    index: './src/views/index.pug',      // output index.html
    about: './src/views/about/index.pug' // output about.html
    // ...
  },

  plugins: [
    // enable processing of Pug files from entry
    new PugPlugin({
      modules: [
        // module extracts CSS from style source files required in Pug
        PugPlugin.extractCss({
          // output filename of CSS files
          filename: 'assets/css/[name].[contenthash:8].css'
        })
      ]
    })
  ],

  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: PugPlugin.loader, // PugPlugin already contain the pug-loader
        options: {
          method: 'render', // fastest method to generate static HTML files
        }
      },
      {
        test: /\.(css|sass|scss)$/,
        use: ['css-loader', 'sass-loader']
      },
    ],
  },
};

Using html-webpack-plugin

Install the pug-loader only if you use the html-webpack-plugin.

npm install @webdiscus/pug-loader --save-dev

Change your webpack.config.js according to the following minimal configuration:

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
  output: {
    path: path.join(__dirname, 'public/'),
    publicPath: '/', // must be defined any path, `auto` is not supported yet
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src/index.pug'),
      filename: 'index.html',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: '@webdiscus/pug-loader',
      },
    ],
  },
};

Usage of Pug in JavaScript

Install the pug-loader.

npm install @webdiscus/pug-loader --save-dev

Change your webpack.config.js according to the following minimal configuration:

const path = require('path');

module.exports = {
  output: {
    path: path.join(__dirname, 'public/'),
    publicPath: '/', // must be defined any path, `auto` is not supported yet
  },
  entry: {
    index: './src/index.js', // load a Pug teplate in JS
  },
  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: '@webdiscus/pug-loader',
      },
    ],
  },
};

Load a Pug template in JavaScript. Optional you can pass any data into generated template function.

./src/index.js

const tmpl = require('template.pug');
const html = tmpl({
  myVar: 'value',
});

---

Original options

See original description of options

basedir

Type: string Default: /
The root directory of all absolute inclusion.

doctype

Type: string Default: html
Specifies the type of document. See available doctypes.

self

Type: boolean Default: false
Use the self as namespace for the local variables in template. It will speed up the compilation, but for access to variable, e.g. myVariable, you must write self.myVariable.

globals

Type: Array<string> Default: []
Add a list of global names to make accessible in templates.

filters

Type: object Default: undefined
Hash table of custom filters. Filters let to use other languages in Pug templates.

plugins

Type: Array<Object> Default: []
Plugins allow to manipulate Pug tags, template content in compile process. How it works see in source of pug.

compileDebug

Type: boolean Default: false
Includes the function source in the compiled template to improve error reporting.

pretty

Type: boolean Default: false
This option is deprecated by pugjs and always is false. Don't use it.

Additional options

method

Type: string Default: compile
Values:

• compile the Pug template compiles into a template function and in JavaScript can be called with variables to render into HTML at runtime.
  The query parameter is ?pug-compile. Can be used if the method is render.
  Use this method, if the template have variables passed from JavaScript at runtime. see usage
• render the Pug template renders into HTML at compile time and exported as a string. All required resource will be processed by the webpack and separately included as added strings wrapped to a function.
  The query parameter is ?pug-render. Can be used if the method is compile or is not defined in options.
  Use this method, if the template does not have variables passed from JavaScript at runtime. The method generates the most compact and fastest code. see usage
• html the template renders into a pure HTML string at compile time. The method need an addition loader to handles the HTML.
  Use this method if the rendered HTML needs to be processed by additional loader, e.g. by html-loader see usage

Embedded resources such as img(src=require('./image.jpeg')) handles at compile time by the webpack using asset/resource.

esModule

Type: Boolean Default: false
Enable / disable ESM syntax in generated JS modules.
Values:

• true The pug-loader generates JS modules with the ESM syntax.
  For example: import html from 'template.pug';.
  For smaller and faster JS code, it is recommended to use this mode.
• false defaults. The pug-loader generates JS modules with the CommonJS modules syntax.
  For example, const html = require('template.pug').
  The default value is false for compatibility with the JS modules that is generated by the original pug-loader.

Note: The option esModule is irrelevant for the html method, because it returns a pure HTML string.

💡 For generates smaller and faster template function, it is recommended to use following options:

{
  method: 'render',
    esModule: true,
}

data

Type: Object Default: {}
The custom data will be passed in all Pug templates, it can be useful by pass global data.

⚠️ Limitation by the compile method.
A string representing the source code of the function is limited by the function.toString(), see examples.
For native work of the function passed via the data loader option, use the render method.

embedFilters

Type: Object Default: undefined
Enable embedded Pug filters. To enable a filter, add the following to the pug-loader options:

{
  embedFilters: {
    <FILTER_NAME> : <FILTER_OPTIONS> | <TRUE>,
  }
}

Where <FILTER_NAME> is the name of a embedded filter, the available filters see below. The filter can have options <FILTER_OPTIONS> as an object. If the filter has no options, use true as an option to enable the filter.

See the complete information on the pug filter site and in the sources.

watchFiles

Type: Array<RegExp> Default: [ /\.(pug|jade|js.{0,2}|.?js|ts.?|md|txt)$/i ]
This option allows you to configure a list of RegExp to watch for file changes in resolved dependencies.
The default value enables watching of Pug, scripts, markdown, etc. and ignores images, styles to avoid double processing via Webpack and via Pug's own compiler.

In some cases, you may want to use one SCSS file for styling and include another SCSS file with a Pug filter for code syntax highlighting. The first SCSS file is watched via Webpack, but changes in the second will be ignored.
For example, we want to watch for changes in all source examples such as main.c, colors.scss, etc. from the /code-samples/ folder, to do this, add to the watchFiles option:

{
  watchFiles: [
    /\\/code-samples\\/.+$/,
  ]
}

Note: Default RegExp array will be extends, not overridden.

---

Usage of compile method

This method is used by default.
In JavaScript the required template will be compiled into template function.
In webpack config add to module.rules:

{
  test: /\.pug$/,
    loader: '@webdiscus/pug-loader',
    options: {
    method: 'compile' // default method `compile` can be omitted
  }
}

In JavaScript, the result of require() is a template function. Call the template function with some variables to render it to HTML.

const tmpl = require('template.pug');
const html = tmpl({ key: 'value' }); // the HTML string

To render the Pug direct into HTML, use the query parameter ?pug-render.

// compile into template function, because loader option 'method' defaults is 'compile'
const tmpl = require('template.pug');
const html = tmpl({ key: 'value' });

// render the Pug file into HTML, using the parameter 'pug-render'
const html2 = require('template2.pug?pug-render');

Note: if the query parameter pug-render is set, then will be used rendering for this template, independent of the loader option method. Variables passed in template with method render will be used at compile time.

---

Usage of render method

This method will render the Pug into HTML at compile time.
In webpack config add to module.rules:

{
  test: /\.pug$/,
    loader: '@webdiscus/pug-loader',
    options: {
    method: 'render'
  }
}

In JavaScript the result of require() is an HTML string.

const html = require('template.pug'); // the HTML string

To generate a template function for passing the data in Pug at realtime, use the query parameter ?pug-compile.

// render into HTML, because loader option 'method' is 'render'
const html = require('template.pug');

// compile into template function, using the parameter 'pug-compile'
const tmpl2 = require('template2.pug?pug-compile');
const html2 = tmpl2({ ... });

---

Usage of html method

This method will render the Pug to pure HTML and should be used with an additional loader to handle HTML.
In webpack config add to module.rules:

{
  test: /\.pug$/,
    use: [
    {
      loader: 'html-loader',
      options: {
        esModule: false, // allow to use the require() for load a template in JavaScript
      },
    },
    {
      loader: '@webdiscus/pug-loader',
      options: {
        method: 'html',
      },
    },
  ],
}

In JavaScript the result of require() is an HTML string:

const html = require('template.pug'); // the HTML string

---

Embedded filters

The goal of embedded filters is to use most useful lightweight filters without installation. The embedded filters are custom filters that are collected in one place. These filters can be simply enabled via an option.
See the complete information on the pug filter site and in the sources.

Defaults all embedded filters are disabled. Enable only filters used in your Pug templates.

:escape

The filter replaces reserved HTML characters with their corresponding HTML entities to display these characters as text.

Filter options: none.

Enable the filter:

{
  test: /\.pug$/,
    loader: '@webdiscus/pug-loader',
    options: {
    // enable embedded filters
    embedFilters: {
      escape: true, // enable the :escape filter
    },
  },
},

Using the :escape filter in pug:

pre: code.language-html
:escape
<h1>Header</h1>

Generated HTML:

<pre>
  <code class="language-html">
    &lt;h1&gt;Header&lt;/h1&gt;
  </code>
</pre>

Inline syntax:

p.
The #[:escape <html>] element is the root element.<br>
Inside the #[:escape <html>] element there is a #[:escape <body>] element.

Generated HTML:

<p>The &lt;html&gt; element is the root element.<br>
  Inside the &lt;html&gt; element there is a &lt;body&gt; element.</p>

For more information and examples, see the :escape site.

:code

The filter wraps a content with the <code> tag.

Filter options:

• className {string} The class name of the code tag. For example, the prismjs use the language-* as class name in <code> for styling this tag.

Enable the filter:

{
  test: /\.pug$/,
    loader: '@webdiscus/pug-loader',
    options: {
    // enable embedded filters
    embedFilters: {
      // enable the :code filter
      code: {
        className: 'language-', // class name of `<code>` tag, needed for `prismjs` theme
      },
    },
  },
},

Usage examples:

Pug: #[:code function() { return true }]
Display: function() { return true }

Pug: #[:code:escape <div>]
Display: <div>

Pug: #[:code:highlight(html) <div class="container">content</div>]
Display highlighted code: <div class="container">content</div>

For more information and examples, see the :code site.

:highlight

The filter highlights code syntax.

Filter options:

• verbose {boolean} Enable output process info in console.
• use {string} The name of a highlighting npm module. The module must be installed. Currently, is supported the prismjs only.

Enable the filter:

{
  embedFilters: {
    highlight: {
      verbose: true,
        use: 'prismjs',
    },
  },
}

Usage example:

pre.language-: code
  :highlight(html)
    <!-- Comment -->
    <h1>Header</h1>
    <p>Text</p>

For more information and examples, see the :highlight site.

:markdown

The filter transform markdown to HTML and highlights code syntax.

The :markdown filter require the markdown-it and prismjs modules:

npm install -D markdown-it prismjs

Enable the filter:

{
  test: /.pug$/,
    loader: '@webdiscus/pug-loader',
    options: {
    // enable embedded filters
    embedFilters: {
      // enable :markdown filter
      markdown: {
        // enable highlighting in markdown
        highlight: {
          verbose: true,
            use: 'prismjs',
        },
      },
    },
  },
},

The highlight options:

• verbose {boolean} Enable output process info in console. Use it in development mode only. Defaults is false.
• use {string} The name of a highlighting npm module. The module must be installed. Currently, is supported the prismjs only.

Usage example:

  :markdown
    _HTML_
    ```html
    <!-- Comment -->
    <div class="container">
      <p>Paragraph</p>
    </div>
    ```
    _JavaScript_
    ```js
    const arr = [1, 2, 'banana'];
    ```

Display highlighted code blocks:

HTML

<!-- Comment -->
<div class="container">
  <p>Paragraph</p>
</div>

JavaScript

const arr = [1, 2, 'banana'];

For more information and examples, see the :markdown site.

---

Passing data into template

In JavaScript

By default, the Pug file is compiled as template function, into which can be passed an object with template variables.

const tmpl = require('template.pug');
const html = tmpl({
  myVar: 'value',
  foo: 'bar'
});

But how pass variables in template which is rendered into HTML?
Variables can be passed with query parameters.

const html = require('template.pug?myVar=value&foo=bar');

or as a JSON object:

const html = require('template.pug?' + JSON.stringify({ myVar: 'value', foo: 'bar' }));

Use variables myVar and foo in Pug template.

div The value of "myVar": #{myVar}
div The value of "foo": #{foo}

Usage of query parameters is legal and official documented feature of webpack loader.

In webpack.config.js

Pass myData object via query.

entry: {
  about: './src/pages/about.pug?myData=' + JSON.stringify({ title: 'About', options: { uuid: 'abc123' } })
}

Use the object myData in Pug template.

html
head
  title= myData.title
body
  div UUID: #{myData.options.uuid}

To pass global data to all Pug templates, add the loader options data as any object.

module.exports = {
  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: '@webdiscus/pug-loader',
        options: {
          data: {
            htmlLang: 'en-EN',
            getKeywords: () => {
              const keywords = ['webpack', 'pug', 'loader'];
              return keywords.join(',');
            }
          }
        }
      },
    ],
  },
};

Use the custom data and function in pug.

html(lang=htmlLang)
head
  meta(name="keywords" content=getKeywords())
body

Passing data in HtmlWebpackPlugin

The user data can be passed into Pug template with two ways:

• via HtmlWebpackPlugin options
• via query parameters of template file

module.exports = {
  plugins: [
    new HtmlWebpackPlugin({
      title: 'The some page', // avaliable in Pug as `htmlWebpackPlugin.options.title`
      template: path.join(__dirname, 'src/index.pug?' + JSON.stringify({ myVar: 'value' })), // avaliable as `myVar`
      filename: 'index.html',
    }),
  ],
  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: '@webdiscus/pug-loader',
      },
    ],
  },
};

Use the passed variables htmlWebpackPlugin.options and myVar in Pug template:

html
  head
    title= htmlWebpackPlugin.options.title
  body
    div= myVar

Load a static data in the pug

You can load data directly in pug.
data.json

[
  { "id": 1, "name": "abc" },
  { "id": 2, "name": "xyz" }
]

Require the JSON file in pug.

- var myData = require('./data.json')
each item in myData
  div #{item.id} #{item.name}

---

Usage of embedded resources

To handle resources in Pug with webpack use the require() function:

img(src=require('./path/to/image.jpeg'))

For images, add the following rule to the webpack module:

module.exports = {
  module: {
    rules: [
      {
        test: /\.(png|jpg|jpeg|svg|ico)/,
        type: 'asset/resource',
        generator: {
          filename: 'assets/images/[name].[hash:8][ext]',
        },
      },
    ]
  },
};

For fonts, add the following rule to the webpack module:

module.exports = {
  module: {
    rules: [
      {
        test: /\.(woff2|woff|ttf|svg|eot)/,
        type: 'asset/resource',
        generator: {
          filename: 'assets/fonts/[name][ext]',
        },
      },
    ]
  },
};

More information about asset-modules see here.

Example of dynamic interpolation of image src in pug:

- files = ['image1.jpeg', 'image2.jpeg', 'image3.jpeg']
each file in files
  img(src=require(`./path/to/${file})`)

💡 Resolve resources

The file in the current directory MUST start with ./:

img(src=require('./image.jpeg'))
img(src=require('./sub/path/to/image.jpeg'))

The file in the parent directory MUST start with ../:

img(src=require('../images/image.jpeg'))

The relative path from loader option basedir MUST start with /:

loader: '@webdiscus/pug-loader',
  options: {
  basedir: path.resolve(__dirname, './src')
}

img(src=require('/assets/images/image.jpeg'))

The file in the directory defined by webpack aliase MAY start with ~ or @, e.g. with the alias Images: path.join(__dirname, 'src/assets/images/'):

img(src=require('Images/image.jpeg'))
img(src=require('~Images/image.jpeg'))
img(src=require('@Images/image.jpeg'))

⚠️ Using a variable with the compile method has the limitation - the variable MUST NOT contain a path, only a filename, because is interpolated at compile time:

- const file = 'image.jpeg'
img(src=require('./path/to/' + file))  // sub directory
img(src=require('../path/to/' + file)) // parent directory
img(src=require('/path/to/' + file))   // option.base directory
img(src=require('~Images/' + file))    // webpack alias

but in current directory, the filename MUST start with ./:

- const file = './image.jpeg'
img(src=require(file))

⚠️ Using an alias from the paths defined in tsconfig.json with the compile method has the limitation - the required argument MUST be a string only, the webpack not supports an expression with alias:
tsconfig.json

{
  "compilerOptions": {
    "paths": {
      "@Images/*": ["assets/images/*"]
    }
  }
}

- const file = './image.jpeg'
img(src=require('@Images/image.jpeg')) // webpack alias resolved via `resolve.plugiins` from `tsconfig.json`
img(src=require('@Images/' + file))    // ERROR: Can't resolve '@Images' in require expression.

Using a variable with render and html methods has no limitation - the variable MAY contain a path, because is resolved at runtime:

- const file = '../parent/path/to/image.jpeg'
img(src=require(file))
img(src=require('~Images/' + file))
img(src=require('@Images/' + file))

Examples of file resolving

The example of webpack alias used in the table below:

resolve: {
  alias: {
    Images: path.join(__dirname, 'src/assets/images/'),
  },
}

Example in Pug template	@webdiscus/ pug-loader render / html methods	@webdiscus/ pug-loader compile method	pugjs/ pug-loader
img(src=require('logo.png'))	✅	❌	❌
img(src=require('./logo.png'))	✅	✅	✅
img(src=require('../images/logo.png'))	✅	✅	✅
img(src=require('~Images/logo.png'))	✅	✅	✅
- var file = 'logo.png' img(src=require(`~Images/${file}`))	✅	✅	✅
- var file = './logo.png' img(src=require(file))	✅	✅	❌
- var file = './images/logo.png' img(src=require(file))	✅	✅	❌
- var file = '../images/logo.png' img(src=require(file))	✅	❌	❌
- var file = 'logo.png' img(src=require(`./images/${file}`))	✅	✅	✅
- var file = 'logo.png' img(src=require('../images/' + file))	✅	✅	✅
resolve a resource when used mixin and require in same file see the pug-loader issue	✅	✅	❌

---

Usage with Angular

Install:

npm i --save-dev @webdiscus/pug-loader pug-plugin-ng

In pug-loader can be used the optional pug-plugin-ng to allow unquoted syntax of Angular: [(bananabox)]="val"

Create the file webpack.config.js in root directory of angular project:

module.exports = {
  module: {
    rules: [
      {
        test: /\.pug$/,
        loader: '@webdiscus/pug-loader',
        options: {
          method: 'render',
          doctype: 'html',
          plugins: [require('pug-plugin-ng')],
        },
      },
    ],
  },
};

Bind the file webpack.config.js in the Angular config angular.json:

{
  // ...
  "projects": {
    // ...
    "architect": {
      "build": {
        // replace architect.build.builder with this value:
        "builder": "@angular-builders/custom-webpack:browser",
          // add the options:
          "options": {
          "aot": true,
            "customWebpackConfig": {
            "path": "./webpack.config.js" // the path to webpack.config.js
          },
          // ...
        },
        // ...
      },
      "serve": {
        // replace architect.serve.builder with this value:
        "builder": "@angular-builders/custom-webpack:dev-server",
          "options": {
          "browserTarget": "<app-name>:build"
        },
        // ...
      },
      // ...
    }
  }
},
}

In a component file, e.g. ./src/app/app.component.ts set the templateUrl with Pug file:

import { Component } from '@angular/core';

// the variable `description` will be passed into Pug template via resource query
const templateVars = '{"description": "Use Pug template with Angular."}';

@Component({
  selector: 'app-root',
  styleUrls: ['./app.component.css'],
  templateUrl: './app.component.pug?' + templateVars,
})
export class AppComponent {
  title = 'ng-app';
}

Create a Pug template, e.g. ./src/app/app.component.pug:

h1 Hello Pug!
p Description: #{description}

See the complete source of the example.

---

Usage with Vue

Install:

npm i --save-dev @webdiscus/pug-loader

Change your vue.config.js according to the following minimal configuration:

const { defineConfig } = require('@vue/cli-service');

// additional pug-loader options, 
// e.g. to enable pug filters such as `:highlight`, `:markdown`, etc.
// see https://github.com/webdiscus/pug-loader#options
const pugLoaderOptions = {
};

module.exports = defineConfig({
  transpileDependencies: true,

  chainWebpack: (config) => {
    const pugRule = config.module.rule('pug');

    // clear all existing pug loaders
    pugRule.uses.clear();
    pugRule.oneOfs.clear();
  },

  configureWebpack: {
    module: {
      rules: [
        {
          test: /\.pug$/,
          oneOf: [
            // allow <template lang="pug"> in Vue components
            {
              resourceQuery: /^\?vue/u,
              loader: '@webdiscus/pug-loader',
              options: {
                method: 'html', // render Pug into pure HTML string
                ...pugLoaderOptions,
              },
            },
            // allow import of Pug in JavaScript
            {
              loader: '@webdiscus/pug-loader',
              options: {
                method: 'compile', // compile Pug into template function
                ...pugLoaderOptions,
              },
            },
          ],
        },
      ],
    },
  },
});

For additional information see please the discussion: How to configure the plugin for both Vue and non-Vue usage?

Usage Pug in Vue template

<template lang='pug'>
  h1 Hello Pug!
  p Paragraph
</template>

Note: you can use an indent for Pug code in Vue template.

Usage Pug in JavaScript

App.vue

<template>
  <div v-html='demo'></div>
</template>

<script>
  // import Pug as template function
  import demoTmpl from './views/demo.pug';
  
  // define custom data used in Pug template
  const locals = { colors: ['red', 'green', 'blue'] };
  // pass custom data in Pug template
  const demoHtml = demoTmpl(locals);

  export default {
    name: 'App',
    data() {
      return {
        demo: demoHtml
      }
    }
  }
</script>

demo.pug

each color in colors
  div(style=`color: ${color}`) #{color}

Note: the colors is external variable passed from App.vue.

---

Recipes

Resolving the attribute srcset in img tag

img(srcset=`${require('./image1.jpeg')} 320w, ${require('./image2.jpeg')} 640w` src=require('./image.jpeg'))

output

<img srcset="/assets/image1.f78b30f4.jpeg 320w, /assets/image2.f78b30f4.jpeg 640w" src="/assets/image.f78b30f4.jpeg">

Usage of JavaScript in Pug

Use the require() for CommonJS files in Pug templates.
The JS module say-hello.js

module.exports = function(name) {
  return `Hello ${name}!`;
}

Use the module sayHello in Pug template.

- var sayHello = require('./say-hello')
h1 #{sayHello('pug')}

---

Testing

npm run test will run the unit and integration tests.
npm run test:coverage will run the tests with coverage.

---

Also See

• more examples of usages see in test cases
• ansis - ANSI color styling of text in terminal
• pug GitHub
• pug API Reference
• pug-plugin
• [Pug filters][pug-filters] embedded in the pug-loader

License

ISC