将特定字符后的空格插入javascript字符串 [英] Insert space after certain character into javascript string

问题描述

我正在处理表单，我想屏蔽电话号码的输入。我找到的插件对我来说不合适，因为区号可能是1或2个字符长。
我想做的是以下内容：
当用户在前两个字符之后键入其数字时，脚本在keyup上插入一个空格，然后在接下来的三个之后以及之后的每四个字符之后。
所以当有人输入44444444444然后在文本框中出现44 44 444 4444.
我也必须检查第二组，当有人在那里输入例如1时，数字必须如下：44 1 444 4444

I'm working on a form and I'd like to mask the input of the phone numbers. The plugins what I found aren't okay for me since the area code could be 1 or 2 character long. What I'd like to do is the following: when the user types his number after the first two character the script inserts a space on keyup, then after the next three and later after every fourth character. So when someone types 44444444444 then in the textbox appears 44 44 444 4444. I must check the second group as well, and when someone types there for example 1, the the number must look like: 44 1 444 4444

有任何解决办法吗？

推荐答案

你可以这样做：

http://jsfiddle.net/ffwAA/4/

将此函数应用于字符串以获得所需的格式：

Which applies this function to the string to get the desired formatting:

function formatCode(str){
    var result = str;

    str = str.replace(/\D+/g, "");
    var m = str.match(/^(\d\d)(?:([2-90]\d|1)(?:(\d\d\d)(\d+)?)?)?$/);

    if(m){
        result = m[1] + " ";
        if(m[2]) result += m[2] + " ";
        if(m[3]) result += m[3] + " ";

        if(m[4]){
            result += m[4].split(/(\d{4})/).join(" ");
            result = result.replace(/\s+/g, " ");
        }
    }

    return result;
}

并使用此jQuery进行设置：

And using this jQuery to set it up:

function update(obj){
    var val = obj.value;
    var got = formatCode(val);

    if(got != val)
        obj.value = got;
}

var timer;
var prev_val = "";

$('#code').keyup(function(){
    clearTimeout(timer);

    // when adding numbers at the end of input, update at once
    // don't want to update when editing in the middle of the string or removing parts of it
    // because it would move the carret location to the end of input, and make it unusable
    if(this.value.indexOf(prev_val) == 0){
        update(this);
        prev_val = this.value;
        return;
    }

    prev_val = this.value;

    // in other cases update 1 second after the changes are done
    timer = setTimeout(update, 1000, this);
});

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