core-js- JavaScript 的模块化标准库
JavaScript 常用JavaScript包
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详细介绍
core-js 是babel-polyfill 的底层依赖,通过各种奇技淫巧,用 ES3 实现了大部分的 ES2017 原生标准库,同时还要严格遵循规范。
示例:
Array.from(new Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
'*'.repeat(10); // => '**********'
Promise.resolve(32).then(x => console.log(x)); // => 32
setImmediate(x => console.log(x), 42); // => 42
var core = require('core-js/library'); // With a modular system, otherwise use global `core`
core.Array.from(new core.Set([1, 2, 3, 2, 1])); // => [1, 2, 3]
core.String.repeat('*', 10); // => '**********'
core.Promise.resolve(32).then(x => console.log(x)); // => 32
core.setImmediate(x => console.log(x), 42); // => 42
经过测试并支持的平台
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Chrome 26+
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Firefox 4+
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Safari 5+
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Opera 12+
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Internet Explorer 6+ (sure, IE8- with ES3 limitations)
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Edge
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Android Browser 2.3+
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iOS Safari 5.1+
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PhantomJS 1.9 / 2.1
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NodeJS 0.8+
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