ejs-tpl-loader/index.js

Lodash HTML Templates loader for webpack

'use strict';

var _ = require('lodash');
var loaderUtils = require("loader-utils");
var htmlLoader = require('html-loader');

function inlineRequireStatements(javascript) {
    return javascript.replace(/(("(?:[^\\"]|\\.)*")|(require)\([^\)]+\))\s*\+?\s*/g,
        function (fullMatch, content, literal, submatch) {
            return submatch === 'require' ? '<%= ' + content + ' %>' : JSON.parse(content);
        });
}

module.exports = function (source) {
    var prefix = 'module.exports = ';

    var htmlLoaderResult = htmlLoader.apply(this, arguments);
    if (htmlLoaderResult.indexOf(prefix) !== 0) {
        throw new Error('Invalid html-loader result');
    }
    var html = inlineRequireStatements(htmlLoaderResult.substr(prefix.length).replace(/;$/, ''));

    this.cacheable && this.cacheable();
    var options = loaderUtils.parseQuery(this.query);

    var templateOptions = {};
    ['escape', 'evaluate', 'interpolate', 'variable'].forEach(function (key) {
        templateOptions[key] = options[key];
    });

    var template = _.template(html, templateOptions);
    return 'module.exports = ' + template;
};