JavaScript 支持情况
运行限制
基于安全考虑，小程序中不支持动态执行 JS 代码，即：
- 不支持使用
eval 执行 JS 代码
- 不支持使用
new Function 创建函数
客户端 ES6 API 支持情况
微信小程序已经支持了绝大部分的 ES6 API，已支持的 API 如下（部分API依赖系统版本）：
| String |
iOS8 |
iOS9 |
iOS10 |
Android |
| codePointAt |
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| normalize |
✘ |
✘ |
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| includes |
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| startsWith |
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| endsWith |
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| repeat |
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| String.fromCodePoint |
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| Array |
iOS8 |
iOS9 |
iOS10 |
Android |
| copyWithin |
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| find |
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| findIndex |
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| fill |
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| entries |
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| keys |
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| values |
✘ |
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✘ |
| includes |
✘ |
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| Array.from |
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| Array.of |
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| Number |
iOS8 |
iOS9 |
iOS10 |
Android |
| isFinite |
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| isNaN |
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| parseInt |
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| parseFloat |
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| isInteger |
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| EPSILON |
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| isSafeInteger |
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| Math |
iOS8 |
iOS9 |
iOS10 |
Android |
| trunc |
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| sign |
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| cbrt |
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| clz32 |
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| imul |
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| fround |
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| hypot |
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| expm1 |
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| log1p |
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| log10 |
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| log2 |
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| sinh |
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| cosh |
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| tanh |
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| asinh |
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| acosh |
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| atanh |
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| Object |
iOS8 |
iOS9 |
iOS10 |
Android |
| is |
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| assign |
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| getOwnPropertyDescriptor |
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| keys |
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| getOwnPropertyNames |
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| getOwnPropertySymbols |
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| Other |
iOS8 |
iOS9 |
iOS10 |
Android |
| Symbol |
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| Set |
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| Map |
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| Proxy |
✘ |
✘ |
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✘ |
| Reflect |
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| Promise |
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