JSFiddle - React, Tailwind, and code Playground
HTML
<input type="text" id="txtFld" onblur="if(!Number(this.value)){alert('not a number');}" />Please Whitelist JSFiddle in your content blocker.
Help keep JSFiddle free for always by one of two ways:
- Whitelist JSFiddle in your content blocker (two clicks)
- Go PRO and get access to additional PRO features →