== ：只判断内容
console.log(5==5);//true
console.log(5=='5');//true
===:判断内容和数据类型
console.log(5==5);//true
console.log(5=='5');//false
JavaScript == 与 ===区别
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转载自blog.csdn.net/wangdada___/article/details/102647334
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