console.log([] === []);
console.log(undefined == 0);
console.log(undefined == false);
console.log(false == '');
false==' '//true
console.log(false == '11 ');//false
false==0// true
false == undefined//false
true==1//true true ==' '//false
console.log([] === []); false console.log(undefined === 0); false console.log(undefined === false); false console.log(false == ''); true
undefined == 0 相当于隐私转换成了 NAN == 0
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