allow only numeric

Murali P

2y1.2kJavaScript

hi,

we have a validation like allow only number and "," as per functionality.

and this has to work on click of save button only.

used Number.isnan but its not validating the +1 kind of input since internally treating as number.

help me on this

3 Replies

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Gowtham Cp2y ago

Accepted answer

Hi ,

To ensure the input only contains numbers and commas when clicking the "Save" button, use a regular expression to validate the input. Here's how:

document.getElementById('saveButton').addEventListener('click', function() {
    const input = document.getElementById('inputField').value.trim();
    const isValid = /^[0-9,]+$/.test(input);

    if (isValid) {
        console.log('Valid input:', input);
        // Proceed with save
    } else {
        console.log('Invalid input! Only numbers and commas are allowed.');
        // Show error message
    }
});

Hope it helps!

Prasad Raveendran2y ago

If you'd like to validate the input without using regular expressions, you can take a more manual approach by checking each character in the input string to ensure it’s either a digit or a comma.

Here’s how you can do this:

Murali P2y ago
Thanks a lot goutham for ur help... It saves my day
+3