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To restrict input to a number, you can use the type attribute with a value of number . For example: <input type="number" name="quantity" min="1" max="10">

Approach: We have used isNaN() function for validation of the text field for numeric value only. Text-field data is passed in the function and if passed data is a number then isNan() returns true and if data is not a number or a combination of both number and alphabets then it returns false.

You can use an <input type="number" /> . This will only allow numbers to be entered into othe input box. Please note that the input type="number" tag is only supported in newer browsers.

The Solution You can set the type attribute of the input element to ?number?. The input element will not allow non-numerical inputs to be added and it has built-in validation. An input with a type of ?number? has extra attributes including min , max , and step .

JS $('#inumber'). keypress(function (e) { var regex = new RegExp("^[a-zA-Z0-9_]+$"); var str = String. fromCharCode(! e. charCode ? e. which : e. charCode); if (regex. test(str)) { return true; } e. preventDefault(); return false;

We use <input> tag to get user input in HTML. To give a limit (or range) to the input field, we use the min and max attributes, which is to specify a maximum and minimum value for an input field respectively. To set the maximum character limit in input field, we use <input> maxlength attribute.

By default, HTML 5 input field has attribute type=?number? that is used to get input in numeric format. Now forcing input field type=?text? to accept numeric values only by using Javascript or jQuery. You can also set type=?tel? attribute in the input field that will popup numeric keyboard on mobile devices.