检查contenteditable div的输入是否为数字

Question

I have a contenteditable div that is to be used to input numeric values. If the value entered is not numeric, I want a message to alert saying that the value is not valid.

html:

<div class="myinput" contenteditable></div>

JS:

    if (myinput is not a number)
        alert("Please enter a valid number.");

What do I replace "myinput is not a number" with to get what I want? I tried using !$("div.number").html() but that only checks to see if any input exists, not a numeric one. I am not sure if it is possibile to use .isNumeric() after .html(). I must also keep the input as a div, I cannot use an input type="number". Any help would be great. Thanks!

Answer 1

You can use isNaN :

if (isNaN($("div.number").html()))

Note that this also accepts strings with spaces at end (which is probably your case).

To get the number after that, the simplest solution is

var n = +$("div.number").html();