js编程JavaScript特殊的相关内容

阿里云文档 2023-10-30

如何实现H5JS的编程_移动开发平台 mPaaS(mPaaS)

目前，很多移动 App 前端都采用了 JavaScript (JS) 语言进行编码。mPaaS 也提供了移动端 Web 解决方案 —— H5 容器H5 容器简介。H5 承载于 Android 和 iOS 之上，需要进行客户端接入。

文章 2017-12-10 来自：开发者社区

JS编程建议——6：正确处理JavaScript特殊值（2）

建议6：正确处理JavaScript特殊值（2）与null不同，undefined不是JavaScript的保留字，在ECMAScript v3标准中才定义undefined为全局变量，初始值为undefined。因此，在使用undefined值时就存在一个兼容问题（早期浏览器可能不支持undefined）。除了直接赋值和使用typeof运算符外，其他任何运算符对undefined的操作都会引发....

文章 2017-12-10 来自：开发者社区

JS编程建议——6：正确处理JavaScript特殊值（1）

建议6：正确处理JavaScript特殊值（1）1.正确使用NaN和InfinityNaN是IEEE 754中定义的一个特殊的数量值。它不表示一个数字，尽管下面的表达式返回的是true。 typeof NaN === 'number' // true 该值可能会在试图将非数字形式的字符串转换为数字时产生，例如： '0' // 0 'oops' // NaN 如果NaN是数学运...

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更新时间 2022-08-11 15:11:03

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