CODEWITHSUNDEEP
jquery
user2067567
user2067567

Reputation: 3803

Allow -(Negative) sign only once in text box using jQuery

I have a text box where I restrict user from typing anything other than numeric values. Only 0-9 allowed using jQuery.

My code:

if (event.which < 46 || event.which > 59)
event.preventDefault();

Now, I want to allow a negative sign (only at beginning) with numeric like (-12,-13). I should restrict these scenarios (--1,-1-,1----). Only valid negative numbers should be allowed.

How can I do this using jQuery?

Upvotes: 1

Views: 3316

Answers (2)

Niet the Dark Absol
Niet the Dark Absol

Reputation: 324630

Have you considered... not using jQuery for everything?

<input type="number" step="1" />

This will allow the user to type anything they want, but supporting browsers (all of them if they're up-to-date) will prevent the form from being submitted if the value is not a valid number.

Unsupporting (out-of-date) browsers will submit the form regardless, but that's fine because 1) You should be validating server-side anyway, and 2) any jQuery solution would fail if the user disables JavaScript, whereas this will work without JS in supporting browsers.

Upvotes: 1

Michael Aguilar
Michael Aguilar

Reputation: 856

you can use this validator: jquery.numeric

http://www.texotela.co.uk/code/jquery/numeric/

Upvotes: 1

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