94 lines
No EOL
2.8 KiB
JavaScript
Executable file
94 lines
No EOL
2.8 KiB
JavaScript
Executable file
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = minifyJs;
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var _terser = require('terser');
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var _terser2 = _interopRequireDefault(_terser);
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/** Minify JS with Terser */
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function minifyJs(tree, options, terserOptions) {
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tree.match({ tag: 'script' }, function (node) {
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var nodeAttrs = node.attrs || {};
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var mimeType = nodeAttrs.type || 'text/javascript';
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if (mimeType === 'text/javascript' || mimeType === 'application/javascript') {
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return processScriptNode(node, terserOptions);
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}
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return node;
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});
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tree.match({ attrs: true }, function (node) {
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return processNodeWithOnAttrs(node, terserOptions);
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});
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return tree;
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}
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function processScriptNode(scriptNode, terserOptions) {
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var js = (scriptNode.content || []).join(' ').trim();
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if (!js) {
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return scriptNode;
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}
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var result = _terser2.default.minify(js, terserOptions);
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if (result.error) {
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throw new Error(result.error);
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}
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if (result.code === undefined) {
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return scriptNode;
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}
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scriptNode.content = [result.code];
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return scriptNode;
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}
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function processNodeWithOnAttrs(node, terserOptions) {
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var jsWrapperStart = 'function _(){';
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var jsWrapperEnd = '}';
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var _iteratorNormalCompletion = true;
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var _didIteratorError = false;
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var _iteratorError = undefined;
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try {
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for (var _iterator = Object.keys(node.attrs || {})[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
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var attrName = _step.value;
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if (attrName.search('on') !== 0) {
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continue;
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}
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// For example onclick="return false" is valid,
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// but "return false;" is invalid (error: 'return' outside of function)
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// Therefore the attribute's code should be wrapped inside function:
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// "function _(){return false;}"
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var wrappedJs = jsWrapperStart + node.attrs[attrName] + jsWrapperEnd;
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var wrappedMinifiedJs = _terser2.default.minify(wrappedJs, terserOptions).code;
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var minifiedJs = wrappedMinifiedJs.substring(jsWrapperStart.length, wrappedMinifiedJs.length - jsWrapperEnd.length);
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node.attrs[attrName] = minifiedJs;
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}
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} catch (err) {
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_didIteratorError = true;
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_iteratorError = err;
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} finally {
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try {
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if (!_iteratorNormalCompletion && _iterator.return) {
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_iterator.return();
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}
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} finally {
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if (_didIteratorError) {
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throw _iteratorError;
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}
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}
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}
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return node;
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} |