const _ = require('lodash') const loaderUtils = require('loader-utils') module.exports = function (source) { if (this.cacheable) { this.cacheable() } // The following part renders the tempalte with lodash as aminimalistic loader // // 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' ] 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(';') + ';' + // Execute the lodash template 'return (' + template.source + ')();' + '}' }