“use strict“； var _interopRequireDefault = require(“@babel/runtime/helpers/interopRequireDefault“)；
“use strict”;
var _interopRequireDefault = require(“@babel/runtime/helpers/interopRequireDefault”);
Object.defineProperty(exports, “__esModule”, {
value: true
});
exports.defaultGetPublicPath = defaultGetPublicPath;
exports.evalCode = evalCode;
exports.getGlobalProp = getGlobalProp;
exports.getInlineCode = getInlineCode;
exports.isModuleScriptSupported = isModuleScriptSupported;
exports.noteGlobalProps = noteGlobalProps;
exports.readResAsString = readResAsString;
exports.requestIdleCallback = void 0;
var _slicedToArray2 = _interopRequireDefault(require(“@babel/runtime/helpers/slicedToArray”));
var _typeof2 = _interopRequireDefault(require(“@babel/runtime/helpers/typeof”));
/**
- @author Kuitos
- @homepage https://github.com/kuitos/
- @since 2019-02-25
- fork from https://github.com/systemjs/systemjs/blob/master/src/extras/global.js
*/
var isIE11 = typeof navigator !== ‘undefined’ && navigator.userAgent.indexOf(‘Trident’) !== -1;
function shouldSkipProperty(global, p) {
// 如果不是global原生的属性，p不是一个数字类型并且p小于global的长度，返回true
if (!global.hasOwnProperty§ || !isNaN§ && p < global.length) return true;
if (isIE11) {
// https://github.com/kuitos/import-html-entry/pull/32，最小化 try 范围
try {
return global[p] && typeof window !== ‘undefined’ && global[p].parent === window;
} catch (err) {
return true;
}
} else {
return false;
}
} // safari unpredictably lists some new globals first or second in object order
var firstGlobalProp, secondGlobalProp, lastGlobalProp;
// 获取全局定义的属性
function getGlobalProp(global) {
// 遍历次数，global属性名数组对应的索引，每遍历一次都会加1
var cnt = 0;
// 上一次的属性名
var lastProp;
var hasIframe = false;
// 遍历global对象
for (var p in global) {
if (shouldSkipProperty(global, p)) continue; // 遍历 iframe，检查 window 上的属性值是否是 iframe，是则跳过后面的 first 和 second 判断
// 遍历window.frames
for (var i = 0; i < window.frames.length && !hasIframe; i++) {
var frame = window.frames[i];
if (frame === global[p]) {
// 拥有iframe
hasIframe = true;
break;
}
}
// 支遍历两次？cnt = 0、cnt = 1？还是当前条件不成立，会一直遍历，cnt = Object.keys(global).length
if (!hasIframe && (cnt === 0 && p !== firstGlobalProp || cnt === 1 && p !== secondGlobalProp)) return p;
cnt++;
// 记录上一次的属性名
lastProp = p;
}
if (lastProp !== lastGlobalProp) return lastProp;
}
// 标记全局属性
function noteGlobalProps(global) {
// alternatively Object.keys(global).pop()
// but this may be faster (pending benchmarks)
firstGlobalProp = secondGlobalProp = undefined;
for (var p in global) {
if (shouldSkipProperty(global, p)) continue;
// 标记第一个、第二个全局属性
if (!firstGlobalProp) firstGlobalProp = p;else if (!secondGlobalProp) secondGlobalProp = p;
// 上一个全局属性
lastGlobalProp = p;
}
return lastGlobalProp;
}
// 获取内联代码
function getInlineCode(match) {
//
// 内联代码的开始位置
var start = match.indexOf(‘>’) + 1;
// 内联代码的结束位置，从后向前检索字符串
var end = match.lastIndexOf(‘<’);
// 不包含结束位置
return match.substring(start, end);
}
// 默认获取公共路径
function defaultGetPublicPath(entry) {
// 如果entry是对象类型，返回"/"
if ((0, _typeof2[“default”])(entry) === ‘object’) {
return ‘/’;
}
try {
var _URL = new URL(entry, location.href),
origin = _URL.origin,
pathname = _URL.pathname;
// 除去文件名x.js得到公共路径
var paths = pathname.split(‘/’); // 移除最后一个元素
paths.pop();
return "".concat(origin).concat(paths.join('/'), "/");
} catch (e) {
console.warn(e);
return ‘’;
}
} // Detect whether browser supports