Template-ejs-loader NPM

template-ejs-loader

EJS (Embeded JavaScript) loader for Webpack. It converts EJS templates to plain HTML using the EJS npm package.

Features

webpack5 support
Import .js,.json and node modules using require
All files can be passed values.

Instalation

npm i -D template-ejs-loader

Usage

NOTE: You need to chain the template-ejs-loader with an html loader such as the html-loader and use a template plugin such as the html-webpack-plugin. To install these run npm i -D html-loader html-webpack-plugin.

Inside your webpack config file add the fallowing rules

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

module.exports = {
  // ...
  module: {
    rules: [
      {
        test: /\.ejs$/i,
        use: ['html-loader', 'template-ejs-loader'],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: './src/ejs/index.ejs',
    }),
  ],
  // ...
}

Options

You can set the values supported by ejs. See here for the values.

The following are your own configuration options. | Name | Type | Default | Description | | :-----------------------: | :--------: | :-----: | :-------------------------------- | | data | {Object} | {} | |

`data`

Type: Object Default: {}

Use this if you want to pass the same value to all ejs files. If you want to pass individual values, see here.

Importing partials

<!-- plain import -->
<%- include('components/footer.ejs') %>

<!-- appending data -->
<%- include('components/header.ejs', { title: 'TOP' }) %>

Example:

index.ejs

<%- include('/components/header.ejs', { title: 'TOP' }) %>

<%- include('/components/footer.ejs') %>

header.ejs

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title><%= title %></title>
  </head>

  <body>

footer.ejs

</body>
</html>

Note: Include preprocessor directives (<% include user/show %>) are not supported in ejs v3.0+.

Importing JavaScript or JSON files

index.ejs

<!DOCTYPE html>
<html lang="en">
  <head>
    <% const meta = require('../data/index-meta.js') %>
    <%- include('components/header.ejs', meta) %>
  </head>
  <!-- ... -->
</html>

index-meta.js

module.exports = {
  title: 'Webpack Starter App',
  author: 'John Doe',
  keywords: ['lorem', 'ipsum', 'dolor', 'sit', 'amet'],
  description: 'Lorem ipsum dolor sit, amet consectetur adipisicing elit.',
  customFunction: function () {
    // ...
  },
}

Importing node modules

index.ejs

<!DOCTYPE html>
<html lang="en">
  <!-- ... -->

  <div>
    <% const _ = require('lodash') %>
    <%= _.join(['a','b','c'], '~') %>
  </div>

  <!-- ... -->
</html>

Passing individual values

If you are getting all your htmlWebpackPlugin instances generated within a loop, and you want to get indivisual passing values for each .ejs template as variables, you can try this. (This method is using webapck loader inline mechanic to load every ejs file instead, you can also set html-loader/template-ejs-Loader options for each .ejs file.)

Unfortunaly, because webapck loader inline does not support loader option in which type is function, so basicly the option preprocessor of html-loader is NOT supported here, better try another way if you need to do interpolate things, for example: using templateEjsLoaderOption.data to set individual inject value.

webpack.config.js

const { htmlWebpackPluginTemplateCustomizer }  = require('template-ejs-loader')
...
module.exports = {
  ...

  plugins: [
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: htmlWebpackPluginTemplateCustomizer({

        templatePath:'./src/index.ejs' // ejs template path 

        htmlLoaderOption:{
          // you can set individual html-loader option here.
          // but preprocessor option is not supported.
        },
        templateEjsLoaderOption:{ // set individual template-ejs-loader option here
          root:'', // this is for example, if not needed, just feel free to delete.
          data:{ // example, too.
            foo:'test' // btw, you can have indivisual data injection for each .ejs file using data option
          }
        }
      }),
    }),
  ]

  ...
}