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Is the button disabled if there is any /&gt; or &lt;/ in the text <br />
OR<br />
Is the button disabled only at the point that you type the &gt;&nbsp;in '/&gt;'' or the '/' in '/&gt;'
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Is the button disabled if there is any /> or </ in the text
OR
Is the button disabled only at the point that you type the > in '/>'' or the '/' in '/>'

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This is a follow up to this ticket.<br />
<br />
<a href="https://www.experts-exchange.com/questions/29097874/using-jquery-or-JavaScript-to-prevent-user-from-typing-a-character-string-in-a-textbox.html?anchor=a42554070&notificationFollowed=207158836&anchorAnswerId=42554070#a42554070" rel="ugc">https://www.experts-exchange.com/questions/29097874/using-jquery-or-JavaScript-to-prevent-user-from-typing-a-character-string-in-a-textbox.html?anchor=a42554070&notificationFollowed=207158836&anchorAnswerId=42554070#a42554070</a><br />
<br />
This is just for learning purposes, learning to work with regex.<br />
<br />
So in the example in that ticket, how would I revise it to the following.<br />
Either using regex or jquery or JavaScript.<br />
<br />
Add a button called Button1.<br />
<br />
If I type the less than sign proceded by the forwad slash sign like this &lt;/ then hide the button.<br />
If I type the greater than sign preceded by the forwad slash sign like this /&gt; then hide the button.
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This is a follow up to this ticket.

https://www.experts-exchange.com/questions/29097874/using-jquery-or-JavaScript-to-prevent-user-from-typing-a-character-string-in-a-textbox.html?anchor=a42554070&notificationFollowed=207158836#a42554070

This is just for learning purposes, learning to work with regex.

So in the example in that ticket, how would I revise it to the following.
Either using regex or jquery or JavaScript.

Add a button called Button1.

If I type the less than sign proceded by the forwad slash sign like this </ then hide the button.
If I type the greater than sign preceded by the forwad slash sign like this /> then hide the button.

checking input of textbox

JavaScript is a dynamic, object-based language commonly used for client-side scripting in web browsers. Recently, server side JavaScript frameworks have also emerged. JavaScript runs on nearly every operating system and  in almost every mainstream web browser.

JavaScript

jQuery (Core) is a cross-browser JavaScript library that provides abstractions for common client-side tasks such as Document Object Model (DOM) traversal, DOM manipulation, event handling, animation and Ajax. jQuery also provides a platform to create plugins that extend jQuery's capabilities beyond those already provided by the library.