limitCash(val) {
let num = val.toString(); //先转换成字符串类型
if (num.indexOf('.') == 0) {
//第一位就是 .
num = 0 + num
}
num = num.replace(/[^\d.]/g, ""); //清除“数字”和“.”以外的字符
num = num.replace(/\.{2,}/g, "."); //只保留第一个. 清除多余的
num = num.replace(".", "$#$").replace(/\./g, "").replace("$#$", ".");
num = num.replace(/^(\-)*(\d+)\.(\d\d).*$/, '$1$2.$3'); //只能输入两个小数
if (num.indexOf(".") < 0 && num != "") {
num = parseFloat(num);
}
return num
},
WeChat Mini Program limits the amount input
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Origin blog.csdn.net/AK852369/article/details/115082935
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