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Thread: Input Only Numbers with HTML

  1. #1
    Join Date
    Jul 2019
    Posts
    1

    Input Only Numbers with HTML

    I want to input only numbers in HTML or Javascript. What are different ways for this? Thanks.

  2. #2
    Join Date
    Jun 2009
    Posts
    112

    Re: Input Only Numbers with HTML

    You've got the HTML <input> tag type of "number" which is the easiest.
    https://www.w3schools.com/html/html_...nput_types.asp
    If you're using jQuery you can add to jQuery a plug-in which handles this when a key is pressed:
    Code:
    	jQuery.fn.forceNumeric = function () {
    		return this.each(function () {
    			$(this).keydown(function (e) {
    				var key = e.which || e.keyCode;
    				if (!e.shiftKey && !e.altKey && !e.ctrlKey &&
    					key >= 48 && key <= 57 || key >= 96 && key <= 105 || key == 8  || key == 9 || key == 13 ||
    					key == 35 || key == 36 || key == 37 || key == 39  || key == 46 || key == 45)
    					return true;
    				return false;
    			});
    		});
    	}
    And then you can use <input> with type "text" and apply a class to it, e.g. "NumbersOnly" which in turn calls this:
    Code:
    $('input[type=text].NumbersOnly').forceNumeric();
    This blocks users from typing anything other than numbers however it does prevent them from pasting anything in regardless of whether that's a number.
    There are lots of ways to do this:
    http://letmegooglethat.com/?q=only+a...ml+input+field

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