Can I use ExtJs without a license, such as jQuery?

Question

Can I use ExtJs without a license, such as jQuery? Can I publish a website using ExtJS without their permission?

Answer 1

ExtJS GPL license means that if you use ExtJS under the GPL license and do not modify ExtJS itself, then you can freely use ExtJS in any way on any website. But if you take ExtJS and start modifying ExtJS itself (to create the best Super-Duper-ExtJS library), you have to share it with everyone, because if you start selling Super-Duper-ExtJS to your customers, what happens so it is that the ExtJS-Company is competing with itself. I don’t think you need to share your "Site Source" anyway. If you need to share your "source code" of websites with other people when using ExtJS-GPL, then only the ExtJS-GPL license will start to look absurd, and you need to start looking at jQueryUI or DOJO! But I don’t think that “ExtJS-Company” means to share your source site only because you used your ExtJS library! What they say .......

Answer 2

DISCLAIMER: I am not a lawyer.

Yes, you can use Extjs on your website without asking permission (unless you distribute it). There are many questions about the GPL, so I won’t go into details.

If you are encoding an application for a client, it is intended only for use by this company. You do not need to disclose your source code. On the other hand, if you are creating a web application that you sell (or distribute) to several companies.

However, they offer great products. Therefore, do not hesitate to support them by buying a license.

Answer 3

ExtJS is available under GPL v3 for open source projects and with a commercial license for their own applications. License terms for ExtJS can be found here ; see this page for more details.

However, I am not a lawyer, and if you are not sure what is good in your particular situation, you should seek help from a lawyer.

Answer 4

After doing a bit more research, I take back what I said with my comments. Take a look at this page (which is probably a bit biased, but adds a lot of useful information):

http://pablotron.org/?cid=1556

Their position is intentionally vague, and some of the comments they posted seem to imply that you will have to post unrelated code on your website, which was uploaded at the same time. Although I do not think this will strengthen the thorough review of the GPL, most companies are not at risk and just buy a license. These people are poor open source software managers.