我正在尝试使用 webpack 和 babel 构建尽可能小的包。
我知道为了跳过 , 等的重复extends。classCallCheck我应该使用@babel/plugin-transform-runtime，这可以按预期工作。
不幸的是，仍然有一些函数在模块的开头被定义了很多次，正在使用它们。他们之中有一些是：
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
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; }
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; } } }; }
等等...
我的配置文件是：
babel.config.js
module.exports = function(api) {
api.cache(false);
const presets = [
["@babel/preset-typescript"],
[
"@babel/preset-env",
{
"targets": {
"edge": "14",
"chrome": "61",
"safari": "11.1",
"ie": "11",
"ios": "8"
}
}
]
];
const plugins = [
["@babel/plugin-proposal-class-properties", { "loose": true }],
["@babel/plugin-transform-runtime"]]
return {
presets,
plugins,
sourceType: "unambiguous"
};
};
网络包：
config.entry = [
"core-js/stable/array/includes",
"core-js/stable/array/find",
"core-js/stable/array/from",
"core-js/stable/promise",
"core-js/stable/map",
"core-js/stable/set",
"core-js/stable/symbol/async-iterator",
"regenerator-runtime/runtime",
"intersection-observer",
bundleEntry];
我玩了很多配置 babel，但没有成功。任何帮助将不胜感激。