Title: Reminder: Many Javascript Libraries Are Included in Core Author: Ipstenu (Mika Epstein) Published: February 17, 2016 Last modified: February 16, 2016 --- [ ](https://profiles.wordpress.org/ipstenu/) [Ipstenu (Mika Epstein)](https://profiles.wordpress.org/ipstenu/) 12:44 pm _on_ February 17, 2016 Tags: [libraries ( 2 )](https://make.wordpress.org/plugins/tag/libraries/), [reminder ( 30 )](https://make.wordpress.org/plugins/tag/reminder/)    # Reminder: Many Javascript Libraries Are Included in Core WordPress includes jQuery with coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress.. Most everyone knows this. But did you also know WordPress includes a great deal of other libraries for your use. You should take the time to check [the documentation on wp_enqueue_script()](https://developer.wordpress.org/reference/functions/wp_enqueue_script/). But that list actually isn’t complete! For a complete list of registered files inspect` $GLOBALS[‘wp_scripts’]` in the admin UIUI UI is an acronym for User Interface - the layout of the page the user interacts with. Think ‘how are they doing that’ and less about what they are doing.. Registered scripts might change per requested page. You can also check out the massive amounts of files in wp-includes to see even more. My point, though, is that 90% of the time, you don’t need ‘your own’ version of something. We have it. Even datepicker folks (`jquery-ui-datepicker`). Check if core works. If you call it right, most of the time it will. [#libraries](https://make.wordpress.org/plugins/tag/libraries/), [#reminder](https://make.wordpress.org/plugins/tag/reminder/) ### Share this: * [ Threads ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=threads) * [ Mastodon ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=mastodon) * [ Bluesky ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=bluesky) * [ X ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=x) * [ Facebook ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=facebook) * [ LinkedIn ](https://make.wordpress.org/plugins/2016/02/17/reminder-javascript-libraries/?share=linkedin) 1. ![](https://secure.gravatar.com/avatar/024316af8fa284f9ca54dbb695a52e27ebf9f848a5bbf8b590446c642641b258? s=32&d=mm&r=g) 2. [Arnan de Gans](https://profiles.wordpress.org/adegans/) 12:48 pm _on_ February 17, 2016 3. And stop f*cking using googleapi hosted scripts if it’s included in WordPress already… Geez. 4. [@WordPress](https://profiles.wordpress.org/WordPress/) devs – You should include/ optionalize to include (similar to language packs) a bunch of common fonts too so we can stop using the ridiculous google fonts, too 🙂 That would be a major yay! Perhaps a scrape function to pull files from remote to local or whatever. 5. ![](https://secure.gravatar.com/avatar/81eca39d669a1a7e80934482324451aebd4794adf6b438617cd5bd4f9162eaf4? s=32&d=mm&r=g) 6. [Jacob N. Breetvelt](https://profiles.wordpress.org/opajaap/) 12:50 pm _on_ February 17, 2016 7. I, as pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory [https://wordpress.org/plugins/](https://wordpress.org/plugins/) or can be cost-based plugin from a third-party. developer, very much agree with this. Especially google api jquery libraries don’t work ( at all ). 8. ![](https://secure.gravatar.com/avatar/af6cb02f92815fa3d3c86aa63a507360b5130a075f13666748575e63b34edfe1? s=32&d=mm&r=g) 9. [Marcus](https://profiles.wordpress.org/netweblogic/) 1:37 pm _on_ February 17, 2016 10. moreover, it makes your life easier using the scripts shipped with WP since you don’t need to worry about keeping those updated 11. ![](https://secure.gravatar.com/avatar/234c638526c874a3d88307b12a5f903af8c800f2a24708d4da38f9c5387c54f7? s=32&d=mm&r=g) 12. [jeffmcneill](https://profiles.wordpress.org/jeffmcneill/) 2:31 pm _on_ February 17, 2016 13. What (if any) javascripts are loaded by default? If it is zero then all the loading is done by themes and plugins? Trying to get a plain vanilla theme that isn’t chock-a-blockBlock Block is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. with js is very difficult! 14. * ![](https://secure.gravatar.com/avatar/27180c82524020e7339e2b30818b6d8ab004c54f730f12b1434b1e365be0e175? s=32&d=mm&r=g) * [Ipstenu (Mika Epstein)](https://profiles.wordpress.org/ipstenu/) 5:25 pm _on_ February 17, 2016 * You’ll have to check the individual pages. On a naked WP site with a default theme, I have jquery, jquery-coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress., and jquery-migrate * But. That’s where the beauty of the enqueues and their dependancies array comes in! If you say “I need jquery” then WP knows to only call it once 🙂 So you can enqueue your script, say it needs jquery core, and boom! Everyone wins. 15. ![](https://secure.gravatar.com/avatar/ba026393708dd6ff553a40a9673dee6654c66067aaecae432ee95ddf9dcbf184? s=32&d=mm&r=g) 16. [Paul Menard](https://profiles.wordpress.org/pmenard/) 3:12 pm _on_ February 17, 2016 17. Speaking of the date picker and the jQuery UIUI UI is an acronym for User Interface- the layout of the page the user interacts with. Think ‘how are they doing that’ and less about what they are doing. suite. When will coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. include some default styling/theming for jQuery UI functionality for use within the Dashboard? At least for some standardized items like the date picker, accordions, etc. Not asking for the front-end. 18. * ![](https://secure.gravatar.com/avatar/5783a2d9b93f04f6d0a1ddabddcfd71f15136d7eaea7a87f9962d3f93f780224? s=32&d=mm&r=g) * [Ian Dunn](https://profiles.wordpress.org/iandunn/) 4:07 pm _on_ February 17, 2016 * The ticket for including jQuery UIUI UI is an acronym for User Interface - the layout of the page the user interacts with. Think ‘how are they doing that’ and less about what they are doing. CSSCSS CSS is an acronym for cascading style sheets. This is what controls the design or look and feel of a site. in CoreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. is [https://core.trac.wordpress.org/ticket/18909](https://core.trac.wordpress.org/ticket/18909) * In the meantime, there are some nice MP6 datepicker skins at [https://github.com/x-team/wp-jquery-ui-datepicker-skins](https://github.com/x-team/wp-jquery-ui-datepicker-skins) - ![](https://secure.gravatar.com/avatar/7494440b8266712d0056e4d6168491f9db747ab7588cd74f3057473b3201d559? s=32&d=mm&r=g) - [Scott Kingsley Clark](https://profiles.wordpress.org/sc0ttkclark/) 6: 05 pm _on_ February 26, 2016 - That ticket moving forward would make me soooo happy! 19. ![](https://secure.gravatar.com/avatar/763d6dcc1f54568cd88e00169f373ce26f7e022e67d1a25484bae726dd273c54? s=32&d=mm&r=g) 20. [IntellyWP](https://profiles.wordpress.org/intellywp/) 4:05 pm _on_ February 17, 2016 21. And also… please load your library only when you are seeing your pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory [https://wordpress.org/plugins/](https://wordpress.org/plugins/) or can be cost-based plugin from a third-party. pages and not always! And also… please display your notice only inside your plugin pages! 22. For this reason, we introduced in our latest plugin, at the beginning, some code check to remove other unnecessary plugins javascriptJavaScript JavaScript or JS is an object-oriented computer programming language commonly used to create interactive effects within web browsers. WordPress makes extensive use of JS for a better user experience. While PHP is executed on the server, JS executes within a user’s browser. [https://www.javascript.com](https://www.javascript.com/) library or css or displayed notice 🙁 23. * ![](https://secure.gravatar.com/avatar/1ed94af4a73102f21ffd49acfcc51e4034d54c8fec244054b393ab0b4554f587? s=32&d=mm&r=g) * [Joachim Jensen - Intox Studio](https://profiles.wordpress.org/intoxstudio/) 11:00 pm _on_ February 17, 2016 * I agree with loading scripts only when needed. I cannot believe that this is not standard practice by all developers, but everytime I see it (and I mostly see it because of code conflicts) I try to contact the developer. I’d say the response rate is about 50%. * Also, please register scripts by the actual library name. In the example from [@ipstenu](https://profiles.wordpress.org/ipstenu/), use “jquery-ui-datepicker”, _not_ “mytheme-cool-datepicker”. - ![](https://secure.gravatar.com/avatar/27180c82524020e7339e2b30818b6d8ab004c54f730f12b1434b1e365be0e175? s=32&d=mm&r=g) - [Ipstenu (Mika Epstein)](https://profiles.wordpress.org/ipstenu/) 11:01 pm _on_ February 17, 2016 - FWIW: We don’t enforce it with developers since about half the time it would require a lot of deep diving into how a pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress. org Plugin Directory [https://wordpress.org/plugins/](https://wordpress.org/plugins/) or can be cost-based plugin from a third-party. is made and why. I personally recommend only loading what has to be loaded when it must be loaded, but then again I’m also pretty snarky about not including demo folders in plugins. * ![](https://secure.gravatar.com/avatar/1ed94af4a73102f21ffd49acfcc51e4034d54c8fec244054b393ab0b4554f587? s=32&d=mm&r=g) * [Joachim Jensen - Intox Studio](https://profiles.wordpress.org/intoxstudio/) 11:50 pm _on_ February 17, 2016 * I understand, and enforcing such thing could also lead to false positives, e.g. if a pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory [https://wordpress.org/plugins/](https://wordpress.org/plugins/) or can be cost-based plugin from a third-party. really needed a script on each( admin) page. I think it would be more useful if it was written as a “ best practice” somewhere in docs (if it isn’t already). * By the way, I noticed that if you try to register two different versions of the same script, the first one registered is used, not the latest version. I know versioning is there mainly for cache reasons, but if wp_register_script is used correctly, wouldn’t it make sense to take it into consideration and always use latest version registered? Perhaps there already is a discussion for it somewhere? 24. ![](https://secure.gravatar.com/avatar/e94f3356b975fa6aa2f731991d83f9a959b63a34e0eeca117415765f3a9e0e8c? s=32&d=mm&r=g) 25. [A WP Life](https://profiles.wordpress.org/awordpresslife/) 5:35 pm _on_ February 17, 2016 26. Yehh! I found it. It’s very useful for every pluginPlugin A plugin is a piece of software containing a group of functions that can be added to a WordPress website. They can extend functionality or add new features to your WordPress websites. WordPress plugins are written in the PHP programming language and integrate seamlessly with WordPress. These can be free in the WordPress.org Plugin Directory [https://wordpress.org/plugins/](https://wordpress.org/plugins/) or can be cost-based plugin from a third-party. & theme developers. Comments are closed. # Post navigation [← On the Topic of Selling Your Plugins…](https://make.wordpress.org/plugins/2016/02/12/on-the-topic-of-selling-your-plugins/) [Re-thinking “Tags” in the Plugin Directory →](https://make.wordpress.org/plugins/2016/02/25/re-thinking-tags-in-the-plugin-directory/)