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shadowrealm-api

v0.8.3

Published

ShadowRealm polyfill for browser

Downloads

1,093

Readme

ShadowRealm API Polyfill

依照 ShadowRealm API 提案实现的 JavaScript 沙箱,使用 TC39 Test262 的用例进行测试。

简体中文 | English

declare class ShadowRealm {
    constructor();
    evaluate(sourceText: string): Primitive | Function;
    importValue(specifier: string, bindingName: string): Promise<Primitive | Function>;
}

✨ 在线试用一下

安装

npm i -S shadowrealm-api

使用

Ponyfill: 无侵入性

import ShadowRealm from 'shadowrealm-api'

const realm = new ShadowRealm();

Polyfill: 修补全局对象

import 'shadowrealm-api/dist/polyfill'

const realm = new ShadowRealm();

调试

打印内部调试信息

ShadowRealm.__debug = true;

限制

  1. 在 ShadowRealm 中运行的所有代码都处于严格模式下;
  2. ESM 语句不能含有冗余的注释;
// ❌
import/* */defaultExport from "module-name";
export default/* */'xxx';

// ✅
import defaultExport from "module-name";
export default 'xxx';
  1. 不支持导出变量声明;
// ❌
export const obj = {...}, fn = () => {...};

// ✅
const obj = {...}, fn = () => {...};
export { obj, fn };

兼容性

|IE|Edge|Firefox|Chrome|Safari|Opera| |:-:|:-:|:-:|:-:|:-:|:-:| ||14|29[1][2]|32[1][2]|8[2][3]|19[1][2]| |||41|49|10.1[3]|36| |||||14.1||

Notes:

  1. ESM 语句不支持解构赋值;
  2. 顶层作用域需要fetch垫片;
  3. 顶层作用域需要URL垫片;

使用垫片:

import "fetch polyfill";
import "URL polyfill";
import "shadowrealm-api/dist/polyfill";
// 你的代码

联系

  1. 微信: cai_fanwei
  2. QQ群: 663286147
  3. 邮箱: [email protected]