如何使用javascript替换除数字[0-9]以外的所有字符? [英] How to replace all char except number [0-9] using javascript?

问题描述

如何使用Java脚本替换数字[0-9]以外的所有字符?

How to replace all char except number [0-9] using Javascript?

这是我的代码，

function test_fn(xxx) {
  var xxx = xxx.replace(/[^0-9,.]+/g, "");
  document.getElementById("fid").value = xxx;
}

<input onkeyUp="test_fn(this.value)" id="fid">

但是当用户填写012345...时，我的代码无法替换点[.] 我也该如何替换点[.]?

But when user fill 012345... my code can not replace dot [.] How can I do for replace dot [.] too ?

推荐答案

如果只想保留数字，则替换所有非数字\ d =数字.

If you only want to keep numbers, then replace everything that isn't a number \d = number.

function test_fn(xxx) {
  var xxx = xxx.replace(/[^\d]/g, "");
  document.getElementById("fid").value = xxx;
}

可能使用的正则表达式为:

The possible regular expressions to use are:

/\D/g     //\D is everything not \d
/[^\d]/g  //\d is numerical characters 0-9
/[^0-9]/g //The ^ inside [] means not, so in this case, not numerical characters

g表示要匹配所有可能的搜索，因此不需要使用+来匹配其他任何内容.

The g means to match all possibilities of the search, so there is no need to use + to match anything else.

在使用正则表达式时，您会发现此工具非常有用，并且对可能的字符进行了解释在右下角使用.

You'll find this tool very useful when working with regular expressions and it has an explanation of the possible characters to use at the bottom right.

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