javascript笔记03：易犯错的比较运算

1.比较两个值是否相等的常见运算：

"" == "0" //false 0 == "" //true 0 == "0" //true false == "false" //false false == "0" //false false == undefined //false false == null //false null == undefined //false "\t\r\n" == 0 //false

2.比较两个值是否全等的常见运算   

"" === "0" //false 0 === "" //false 0 === "0" //false false === "false" //false false === "0" //false false === undefined //false false === null //false null === undefined //false "\t\r\n" === 0 //false

3.无穷大的比较

Infinity>10 //true Infinity>"abc" //false Infinity<"abc" //false Infinity=="abc" //false Infinity==NaN //false