fix(loader): Allow to add new template parameters

fix #915

lib/loader.js

@@ -25,28 +25,11 @@ module.exports = function (source) {
  //
  // Get templating options
  const options = this.query !== '' ? loaderUtils.parseQuery(this.query) : {};
- // Webpack 2 does not allow with() statements, which lodash templates use to unwrap
- // the parameters passed to the compiled template inside the scope. We therefore
- // need to unwrap them ourselves here. This is essentially what lodash does internally
- // To tell lodash it should not use with we set a variable
  const template = _.template(source, _.defaults(options, { variable: 'data' }));
- // All templateVariables which should be available
- // @see HtmlWebpackPlugin.prototype.executeTemplate
- const templateVariables = [
- 'compilation',
- 'webpack',
- 'webpackConfig',
- 'htmlWebpackPlugin'
- ];
  // Require !!lodash - using !! will disable all loaders (e.g. babel)
  return 'var _ = require(' + loaderUtils.stringifyRequest(this, '!!' + require.resolve('lodash')) + ');' +
- 'module.exports = function (templateParams) {' +
- // Declare the template variables in the outer scope of the
- // lodash template to unwrap them
- templateVariables.map(function (variableName) {
- return 'var ' + variableName + ' = templateParams.' + variableName;
- }).join(';') + ';' +
+ 'module.exports = function (templateParams) { with(templateParams) {' +
  // Execute the lodash template
  'return (' + template.source + ')();' +
- '}';
+ '}}';
 };