这就是我最近写这篇文章的原因。我知道这个问题已经有人回答了，但我把它留到以后使用。

该方法只允许0-9键盘和numpad，退格，制表符，左右箭头(正常形式操作)

$(".numbersonly-format").keydown(function (event) {
    // Prevent shift key since its not needed
    if (event.shiftKey == true) {
        event.preventDefault();
    }
    // Allow Only: keyboard 0-9, numpad 0-9, backspace, tab, left arrow, right arrow, delete
    if ((event.keyCode >= 48 && event.keyCode <= 57) || (event.keyCode >= 96 && event.keyCode <= 105) || event.keyCode == 8 || event.keyCode == 9 || event.keyCode == 37 || event.keyCode == 39 || event.keyCode == 46) {
        // Allow normal operation
    } else {
        // Prevent the rest
        event.preventDefault();
    }
});

我把所有的答案结合在一起，得出了以下代码:

jQuery('#input_id', function(e){
    // Allow: backspace, delete, tab, escape, enter
    if (jQuery.inArray(e.keyCode, [46, 8, 9, 27, 13, 110]) !== -1 ||
        // Allow: Ctrl+A
        (e.keyCode === 65 && e.ctrlKey === true) ||
        // Allow: Ctrl+C
        (e.keyCode === 67 && e.ctrlKey === true) ||
        // Allow: Ctrl+X
        (e.keyCode === 88 && e.ctrlKey === true) ||
        // Disallow several dots (allow 190 only if no dots found)
        (e.keyCode === 190 && jQuery(this).val().indexOf('.') == -1) ||
        // Bug in some Android devices where it is always 229
        (e.keyCode === 229) ||
        // Allow: home, end, left, right
        (e.keyCode >= 35 && e.keyCode <= 40)) {
        // let it happen, don't do anything
        return;
    }
    // Ensure that it is a number and stop the keypress
    if ((e.shiftKey || (e.keyCode < 48 || e.keyCode > 57)) && (e.keyCode < 96 || e.keyCode > 105)) {
        e.preventDefault();
    }
});

此外，表单应该有autocomplete="off"。如果没有这个选项，你可能会在移动设备上遇到自动补全算法的问题。

需要确保你有数字键盘和tab键工作

 // Allow only backspace and delete
            if (event.keyCode == 46 || event.keyCode == 8  || event.keyCode == 9) {
                // let it happen, don't do anything
            }
            else {
                // Ensure that it is a number and stop the keypress
                if ((event.keyCode >= 48 && event.keyCode <= 57) || (event.keyCode >= 96 && event.keyCode <= 105)) {

                }
                else {
                    event.preventDefault();
                }
            }

function suppressNonNumericInput(event){
        if( !(event.keyCode == 8                                // backspace
            || event.keyCode == 46                              // delete
            || (event.keyCode >= 35 && event.keyCode <= 40)     // arrow keys/home/end
            || (event.keyCode >= 48 && event.keyCode <= 57)     // numbers on keyboard
            || (event.keyCode >= 96 && event.keyCode <= 105))   // number on keypad
            ) {
                event.preventDefault();     // Prevent character input
        }
    }

我在我们的内部common js文件中使用了这个。我只是将类添加到需要这种行为的任何输入中。

$(".numericOnly").keypress(function (e) {
    if (String.fromCharCode(e.keyCode).match(/[^0-9]/g)) return false;
});

我认为这对每个人都有帮助

  $('input.valid-number').bind('keypress', function(e) { 
return ( e.which!=8 && e.which!=0 && (e.which<48 || e.which>57)) ? false : true ;
  })