[jQuery Learning Center](/ "jQuery Learning Center")
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Learning Center
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Users
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There's a lot more to learn about building web sites and applications with jQuery than can fit in API documentation. If you're looking for explanations of the basics, workarounds for common problems, best practices, and how-tos, you're in the right place!
Authors
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Too much good information is spread across corners of the web, languishing in blog and forum posts, often just out of reach of people who need it, while the same questionable advice is duplicated across even more questionable sites. Help us stem the tide and educate today's — and tomorrow's — web developers.
### Chapters
* [About jQuery](https://learn.jquery.com/about-jquery/)
* [Using jQuery Core](https://learn.jquery.com/using-jquery-core/)
* [Events](https://learn.jquery.com/events/)
* [Effects](https://learn.jquery.com/effects/)
* [Ajax](https://learn.jquery.com/ajax/)
* [Plugins](https://learn.jquery.com/plugins/)
* [Performance](https://learn.jquery.com/performance/)
* [Code Organization](https://learn.jquery.com/code-organization/)
* [jQuery UI](https://learn.jquery.com/jquery-ui/)
* [jQuery Mobile](https://learn.jquery.com/jquery-mobile/)
### Recently Updated
* [How do I test whether an element has a particular class?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-test-whether-an-element-has-a-particular-class/)
* [How do I test whether an element exists?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-test-whether-an-element-exists/)
* [How do I select elements when I already have a DOM element?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-select-elements-when-i-already-have-a-dom-element/)
* [How do I select an item using class or ID?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-select-an-item-using-class-or-id/)
* [How do I select an element by an ID that has characters used in CSS notation?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-select-an-element-by-an-id-that-has-characters-used-in-css-notation/)
* [How do I replace text from the 3rd element of a list of 10 items?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-replace-text-from-the-3rd-element-of-a-list-of-10-items/)
* [How do I pull a native DOM element from a jQuery object?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-pull-a-native-dom-element-from-a-jquery-object/)
* [How do I get the text value of a selected option?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-get-the-text-value-of-a-selected-option/)
* [How do I disable/enable a form element?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-disable-enable-a-form-element/)
* [How do I check/uncheck a checkbox input or radio button?](https://learn.jquery.com/using-jquery-core/faq/how-do-i-check-uncheck-a-checkbox-input-or-radio-button/)
### Open Source Content
All of the content in this site is completely open source, and we welcome your contribution. Whether you notice a small improvement that should be made, or want to write entirely new articles, this is one area where feature requests are encouraged!
[Open an Issue or Submit a Pull Request](https://github.com/jquery/learn.jquery.com)
Each of our articles has a link to the raw content on GitHub, and we urge everyone to fork, edit, and help improve this community resource!