Check if data from ng-model is a number

Question

Typically data from ng-model biding from input is stored as a string. How can I check if user typed a number or not?

Answer 1

You can use the angular IsNumber feature,

 if (angular.isNumber(modelvar) {
 }

Answer 2

Add validation on the input to prevent anything but numbers,
Allow only numbers to be typed in a textbox

Or better, use a validation engine to check inputs and show warning messages.

Answer 3

You can use;

<input type="number">

To ensure that in the HTML it's a number, and to check in angular;

if(typeof(VARIABLE) != "number"){
    console.log("error, variable is not a number");
    return;
}

Hope it helps!