ejs-loader for webpack

EJS (Underscore/LoDash Templates) loader for webpack. Uses lodash template function to compile templates.

If you are looking for the loader which uses EJS templating engine, there is ejs-compiled-loader

Installation

npm install ejs-loader

Usage

Documentation: Using loaders

var template = require("ejs!./file.ejs");
// => returns the template function compiled with undesrcore (lodash) templating engine.

// And then use it somewhere in your code
template(data) // Pass object with data

You also should provide a global _ variable with the lodash/underscore runtime. You can do it with the following webpack plugin: https://github.com/webpack/docs/wiki/list-of-plugins#provideplugin

plugins: [
    new webpack.ProvidePlugin({
        _: "underscore"
    })
]

Options

Underscore/Lodash options can be passed in using the querystring or adding an esjLoader options block to your configuration.

Config example with Webpack 4+

module.exports = {
  module: {
    rules: [
      {
        test: /\.ejs$/,
        loader: 'ejs-loader',
        options: {
          variable: 'data',
          interpolate : '\\{\\{(.+?)\\}\\}',
          evaluate : '\\[\\[(.+?)\\]\\]'
        }
      }
    ]
  }
};

Config example using a querystring (deprecated):

module.exports = {
  module: {
    loaders: [
      { test: /\.ejs$/, loader: 'ejs-loader?variable=data' },
    ]
  }
};

is equivalent to

var template = _.template('<%= template %>', { variable : 'data' });

module.exports = {
    module: {
        loaders: [
            {
                test: /\.ejs$/,
                loader: 'ejs-loader',
                query: {
                    variable: 'data',
                    interpolate : '\\{\\{(.+?)\\}\\}',
                    evaluate : '\\[\\[(.+?)\\]\\]'
                }
            },
        ]
    }
};

is equivalent to

var template = _.template('<%= template %>', { variable: 'data', interpolate : '\\{\\{(.+?)\\}\\}', evaluate : '\\[\\[(.+?)\\]\\]' });

Config example using the ejsLoader config block (deprecated):

module.exports = {
  module: {
    loaders: [
      { test: /\.ejs$/, loader: 'ejs-loader' }
    ]
  },
  ejsLoader : {
    variable    : 'data',
    interpolate : /\{\{(.+?)\}\}/g,
    evaluate    : /\[\[(.+?)\]\]/g
  }
};

Export as ES Module

ECMAScript Module mode can be utilized to leverage Webpack 4's code splitting/lazy loading and to gain the benefits of tree shaking. This can be used by setting exportAsESM to true in the loader options.

Config example with Webpack 4+

module.exports = {
  module: {
    rules: [
      {
        test: /\.ejs$/,
        loader: 'ejs-loader',
        options: {
          variable: 'data',
          exportAsESM: true
        }
      }
    ]
  }
};

The variable option is required to compile EJS templates into ES compatible modules. If the variable option is not provided as a loader or query option, an Error will be thrown throw. Please see https://github.com/lodash/lodash/issues/3709#issuecomment-375898111 for additional details.

Including nested templates

Lodash template function does not provide include method of ejs module. To include other templates, passing template functions as parameters does the job. For example:

index.js:

var mainTemplate = require('ejs!./main.ejs');
var hyperlinkTemplate = require('ejs!./hyperlink.ejs');
var renderedHtml = mainTemplate({ hyperlink: hyperlinkTemplate });

main.ejs:

<h1><%= hyperlink({ name: 'Example', url: 'http://example.com' }) %></h1>

hyperlink.ejs:

<a href="<%= url %>"><%= name %></a>

As a result, renderedHtml becomes a string <h1><a href="http://example.com">Example</a></h1>.

Release History

• 0.3.5 - Fix dependency vulnerabilities.
• 0.3.3 - Fix dependency vulnerabilities.
• 0.3.0 - Allow passing template options via ejsLoader or via loader's query
• 0.2.1 - Add ability to pass compiller options
• 0.1.0 - Initial release

License

MIT (http://www.opensource.org/licenses/mit-license.php)