qq_36320160的博客 onload = function(){ var a = "23.456322"; var aNew; var re = /([0-9] \.[0-9]{2})[0-9]*/; aNew = a.replace(re,"$1");...更多专业前端知识,请上 【猿2048】www.mk2048.com
科技达人ლ(′◉❥◉`ლ)的博客//取整 let value1 = 12.4 let patt1 = new RegExp(/^\d+$/) ... //12 //小数点后,只取,最后两位小数 let value2 = 12.422 let patt2 = new RegExp(/^\d+(\.\d{1,2})?$/); console.log(patt2.test(value )); //12.42