jQuery删除所有字符，但数字和小数 [英] jQuery remove all characters but numbers and decimals

问题描述

var price = "$23.03";
var newPrice = price.replace('$', '')

这是有效的，但价格也可以是：

This works, but price can also be such as:

var price = "23.03 euros";

以及许多其他货币。

无论如何我只能留下数字和小数（。）？

Is there anyway that I could leave only numbers and decimal(.)?

推荐答案

var newPrice = price.replace(/[^0-9\.]/g, '');

不需要jQuery。您还需要检查是否只有一个小数点，如下所示：

No jQuery needed. You will also need to check if there is only one decimal point though, like this:

var decimalPoints = newPrice.match(/\./g);

// Annoyingly you have to check for null before trying to
// count the number of matches.
if (decimalPoints && decimalPoints.length > 1) {
    // do whatever you do when input is invalid.
}

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