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【js】Object.is() 与原来的比较操作符 ===、== 的区别？ #117

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misty0304 opened this issue May 14, 2020 · 1 comment

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misty0304 commented May 14, 2020

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misty0304 commented May 14, 2020

== 相等运算符，比较时会自动进行数据类型转换
=== 严格相等运算符，比较时不进行隐式类型转换
Object.is 同值相等算法，在 === 基础上对 0 和 NaN 特别处理

+0 === -0 //true
NaN === NaN // false

Object.is(+0, -0) // false
Object.is(NaN, NaN) // true

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