var numberA = 1000000
var numberB = numberA.toLocaleString()
console.log(numberB); //1,000,000
注意:最后输出的numberB是字符串
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var numberA = 1000000
var numberB = numberA.toLocaleString()
console.log(numberB); //1,000,000
注意:最后输出的numberB是字符串
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