JS retains one digit and removes non-digits

This time I will bring you JS to retain one digit and then remove non-digits, and JS to retain one digit and then remove non-digits.What are the precautions?. Here is a practical case. Let’s take a look. one time.

//去除非数字 var clearNoNum = function (item) { if (item!=null && item!=undefined) { //先把非数字的都替换掉，除了数字和. item = item.replace(/[^\d.]/g, ""); //必须保证第一个为数字而不是. item = item.replace(/^\./g, ""); //保证只有出现一个.而没有多个. item = item.replace(/\.{2,}/g, ""); //保证.只出现一次，而不能出现两次以上 item = item.replace(".", "$#$").replace(/\./g, "").replace("$#$", "."); //最多保留小数点后一位 var arr = item.split("."); if (arr.length > 1) item = arr[0] + '.' + (arr[1].length > 1 ? arr[1].substr(0, 1) : arr[1]); } return item; }

Supplement:

Let’s take a look at js processing numbers to retain 2 decimal places. It is not enough to force 2 decimal places. Add .00

1, keep two decimal places //Function: round the floating point number, take 2 digits after the decimal point

2, //keep 2 digits For decimals, such as: 2, 00 will be added after 2. That is 2.00

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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