jQuery-Inputmask插件 [英] jQuery - Inputmask plugin

问题描述

Hei

让任何人都知道jquery中的输入掩码例如，一个字段必须包含三个字母，后跟4个数字. cda1234.如果有人在该字段中写了不适合的内容，则必须连续删除.

Have anyone idea of input mask in jquery For example a field must have three letters followed by 4 numbers. cda1234. If one writes something in the field that does not fit with this must be removed continuously.

推荐答案

快速制作示例，请参见: http ://jsfiddle.net/g8KSg/2/

Cooked an fast example up, see: http://jsfiddle.net/g8KSg/2/

检查前三个字符的非整数，然后仅接受整数.

Checks for non integers for the first 3 characters, and then only accept integers.

可以使用正则表达式进行更明智的选择，但这应该是一个起点:)

Could proberbly be made wiser with regex, but this should give a starting point :)

$('input').keyup(function(e){
    var value = $(this).val();
    if(value.length <= 3) {
       char = value.substring(value.length - 1);
        if(!(isNaN(char))) {
            var newval = value.substring(0, value.length - 1);
            $(this).val(newval);
        }
    }
    if(value.length > 3) {
       char = value.substring(value.length - 1);
        if(isNaN(char)) {
            var newval = value.substring(0, value.length - 1);
            $(this).val(newval);
        }
    }
});

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