Restrict input to numbers only

You can use the <input> tag with attribute type='number'. This input field allows only numerical values. You can also specify the minimum value and maximum value that should be accepted by this field. Save this answer.

1. How do I allow only numeric 0 9 in HTML input box?
2. How do I allow only numbers in input field using regex?
3. How to limit input number in JavaScript?

How do I allow only numeric 0 9 in HTML input box?

You could just use a simple JavaScript regular expression to test for purely numeric characters: /^[0-9]+$/. test(input); This returns true if the input is numeric or false if not.

How do I allow only numbers in input field using regex?

To get a string contains only numbers (0-9) we use a regular expression (/^[0-9]+$/) which allows only numbers. Next, the match() method of the string object is used to match the said regular expression against the input value.

How to limit input number in JavaScript?

Use html type number and inline elements min="1" and max="20" to limit your input field.