js中怎么截取日期的月份和日期

要根据你截取的日期的格式来决定代码

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//假如是2017-10-22
var  dateStr =  '2017-10-22' ;
var  reg = /^(\d{4})-(\d{1,2})-(\d{1,2})$/;
console.log(dateStr.match(reg));
console.log(RegExp.$1);
console.log(RegExp.$2);
console.log(RegExp.$3);

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转载自blog.csdn.net/zuihoudebingwen/article/details/79273194