JS正则表达式检验数字或者带小数点的数字

1. var patrn = /^\d+(\.\d+)?$/; var num = 0.11; if (!patrn.exec(num)){alert("请您输入数字");return; }2. var patten = /^[+-]?(0|([1-9]\d*))(\.\d+)?$/g; var num = 0.11; if(!patten.test(num)){    alert("请您输入数字");return; }

 

转载于:https://www.cnblogs.com/fubuki/p/9724459.html