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lodash源码的getTag

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

为啥要单独判断undifined和null
不需要单独判断用toString也有呀
这不是多次一举吗

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1 Answer

answered Jan 24, 2021 by 深蓝 (71.8m points)

因为要兼容 IE。

IE7 以前 null、undefined 你要直接 toString 的话结果都是 '[object Object]'。

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