jQuery 文本框整数验证 [英] jQuery Textbox Whole Number Validation

问题描述

我有下面的脚本，我用它来验证输入以验证没有文本的文本框，它也很有用地加倍以只允许 0 到 10 之间的数字，最多有 3 个小数位.

I have the script below, which I use to validate input to validate a textbox for no text, and it also usefully doubles to only allow a number between 0 and 10 with up to 3 decimal places.

$('.sourceValidation').keyup(function () {
    if (!this.value.match(/^(([0-9]|10)(\.\d{1,3})?)?$/)) {
    this.value = this.value.replace(/[^0-9\.]/g, '').substring(0,5);}})

我不完全确定这段代码，但我如何修改它，以便它验证 0 到 99 之间的输入(仅限整数)，没有文本，没有小数点.

I am not entirely sure of this code, but how do I rework it so that it will validate an input between 0 and 99 (whole numbers only), no text, no decimal points.

推荐答案

$('.sourceValidation').keyup(function () {
    if (!this.value.match(/^([0-9]{0,2})$/)) {
        this.value = this.value.replace(/[^0-9]/g, '').substring(0,2);
    }
});

关键部分是从

/^(([0-9]|10)(\.\d{1,3})?)?$/

到

/^([0-9]{0,2})$/

..这是一个允许 0、1 或 2 位数字的正则表达式.然而，它允许前导零，例如 01、09 - 甚至 00.我不知道这在您的情况下是否可以接受.

..which is a regex which will allow 0, 1 or 2 digits. It will however allow leading zeroes eg 01, 09 - or even 00. I don't know if this is acceptable in your situation.

更新小提琴

replace 函数是说 [^0-9]/g - 这意味着 - 替换任何不是 (^) adigit (0-9) 并通过整个字符串(g - 全局)执行此操作.然后将其修剪为最多 2 个字符 (substring(0,2)).

The replace function is saying [^0-9]/g - which means - replace anything that is not (^) a digit (0-9) and do it through the whole string (g - global). It is then trimming it to 2 characters max (substring(0,2)).

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