parcel-bundler
Version:
Blazing fast, zero configuration web application bundler
319 lines (256 loc) • 10 kB
JavaScript
"use strict";
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
function _createForOfIteratorHelper(o, allowArrayLike) { var it; if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = o[Symbol.iterator](); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
const Asset = require('../Asset');
const api = require('posthtml/lib/api');
const urlJoin = require('../utils/urlJoin');
const render = require('posthtml-render');
const posthtmlTransform = require('../transforms/posthtml');
const htmlnanoTransform = require('../transforms/htmlnano');
const isURL = require('../utils/is-url'); // A list of all attributes that may produce a dependency
// Based on https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
const ATTRS = {
src: ['script', 'img', 'audio', 'video', 'source', 'track', 'iframe', 'embed'],
href: ['link', 'a', 'use'],
srcset: ['img', 'source'],
poster: ['video'],
'xlink:href': ['use', 'image'],
content: ['meta'],
data: ['object']
}; // A list of metadata that should produce a dependency
// Based on:
// - http://schema.org/
// - http://ogp.me
// - https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/markup
// - https://msdn.microsoft.com/en-us/library/dn255024.aspx
const META = {
property: ['og:image', 'og:image:url', 'og:image:secure_url', 'og:audio', 'og:audio:secure_url', 'og:video', 'og:video:secure_url'],
name: ['twitter:image', 'msapplication-square150x150logo', 'msapplication-square310x310logo', 'msapplication-square70x70logo', 'msapplication-wide310x150logo', 'msapplication-TileImage', 'msapplication-config'],
itemprop: ['image', 'logo', 'screenshot', 'thumbnailUrl', 'contentUrl', 'downloadUrl']
};
const SCRIPT_TYPES = {
'application/javascript': 'js',
'text/javascript': 'js',
'application/json': false,
'application/ld+json': 'jsonld',
'text/html': false
}; // Options to be passed to `addURLDependency` for certain tags + attributes
const OPTIONS = {
a: {
href: {
entry: true
}
},
iframe: {
src: {
entry: true
}
}
};
class HTMLAsset extends Asset {
constructor(name, options) {
super(name, options);
this.type = 'html';
this.isAstDirty = false;
this.hmrPageReload = true;
}
parse(code) {
var _this = this;
return (0, _asyncToGenerator2.default)(function* () {
let res = yield posthtmlTransform.parse(code, _this);
res.walk = api.walk;
res.match = api.match;
return res;
})();
}
processSingleDependency(path, opts) {
let assetPath = this.addURLDependency(path, opts);
if (!isURL(assetPath)) {
assetPath = urlJoin(this.options.publicURL, assetPath);
}
return assetPath;
}
collectSrcSetDependencies(srcset, opts) {
const newSources = [];
var _iterator = _createForOfIteratorHelper(srcset.split(',')),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
const source = _step.value;
const pair = source.trim().split(' ');
if (pair.length === 0) continue;
pair[0] = this.processSingleDependency(pair[0], opts);
newSources.push(pair.join(' '));
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
return newSources.join(',');
}
getAttrDepHandler(attr) {
if (attr === 'srcset') {
return this.collectSrcSetDependencies;
}
return this.processSingleDependency;
}
collectDependencies() {
let ast = this.ast; // Add bundled dependencies from plugins like posthtml-extend or posthtml-include, if any
if (ast.messages) {
ast.messages.forEach(message => {
if (message.type === 'dependency') {
this.addDependency(message.file, {
includedInParent: true
});
}
});
}
ast.walk(node => {
if (node.attrs) {
if (node.tag === 'meta') {
if (!Object.keys(node.attrs).some(attr => {
let values = META[attr];
return values && values.includes(node.attrs[attr]) && node.attrs.content !== '';
})) {
return node;
}
}
if (node.tag === 'link' && node.attrs.rel === 'manifest' && node.attrs.href) {
node.attrs.href = this.getAttrDepHandler('href').call(this, node.attrs.href, {
entry: true
});
this.isAstDirty = true;
return node;
}
for (let attr in node.attrs) {
const attrVal = node.attrs[attr];
if (!attrVal) {
continue;
} // Check for virtual paths
if (node.tag === 'a' && attrVal.lastIndexOf('.') < 1) {
continue;
}
let elements = ATTRS[attr];
if (elements && elements.includes(node.tag)) {
let depHandler = this.getAttrDepHandler(attr);
let options = OPTIONS[node.tag];
node.attrs[attr] = depHandler.call(this, attrVal, options && options[attr]);
this.isAstDirty = true;
}
}
}
return node;
});
}
pretransform() {
var _this2 = this;
return (0, _asyncToGenerator2.default)(function* () {
yield posthtmlTransform.transform(_this2);
})();
}
transform() {
var _this3 = this;
return (0, _asyncToGenerator2.default)(function* () {
if (_this3.options.minify) {
yield htmlnanoTransform(_this3);
}
})();
}
generate() {
var _this4 = this;
return (0, _asyncToGenerator2.default)(function* () {
// Extract inline <script> and <style> tags for processing.
let parts = [];
if (_this4.ast) {
_this4.ast.walk(node => {
if (node.tag === 'script' || node.tag === 'style') {
let value = node.content && node.content.join('').trim();
if (value) {
let type;
if (node.tag === 'style') {
if (node.attrs && node.attrs.type) {
type = node.attrs.type.split('/')[1];
} else {
type = 'css';
}
} else if (node.attrs && node.attrs.type) {
// Skip JSON
if (SCRIPT_TYPES[node.attrs.type] === false) {
return node;
}
if (SCRIPT_TYPES[node.attrs.type]) {
type = SCRIPT_TYPES[node.attrs.type];
} else {
type = node.attrs.type.split('/')[1];
}
} else {
type = 'js';
}
parts.push({
type,
value,
inlineHTML: true,
meta: {
type: 'tag',
node
}
});
}
} // Process inline style attributes.
if (node.attrs && node.attrs.style) {
parts.push({
type: 'css',
value: node.attrs.style,
meta: {
type: 'attr',
node
}
});
}
return node;
});
}
return parts;
})();
}
postProcess(generated) {
var _this5 = this;
return (0, _asyncToGenerator2.default)(function* () {
// Replace inline scripts and styles with processed results.
var _iterator2 = _createForOfIteratorHelper(generated),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
let rendition = _step2.value;
let _rendition$meta = rendition.meta,
type = _rendition$meta.type,
node = _rendition$meta.node;
if (type === 'attr' && rendition.type === 'css') {
node.attrs.style = rendition.value;
} else if (type === 'tag') {
if (rendition.isMain) {
node.content = rendition.value;
} // Delete "type" attribute, since CSS and JS are the defaults.
// Unless it's application/ld+json
if (node.attrs && (node.tag === 'style' || node.attrs.type && SCRIPT_TYPES[node.attrs.type] === 'js')) {
delete node.attrs.type;
}
}
}
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
return [{
type: 'html',
value: render(_this5.ast)
}];
})();
}
}
module.exports = HTMLAsset;