--- title: Bitovi Academy - DOM and jQuery description: Learn jQuery and the DOM APIs by building your own version of jQuery and using it to make a basic tabs widget. 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Send ### Contact Us (312) 620-0386contact@bitovi.com - [ Advanced JavaScript ](https://www.bitovi.com/academy/learn-advanced-javascript.html?hsLang=en-us) - [ DOM and jQuery ](https://www.bitovi.com/academy/learn-dom-jquery.html?hsLang=en-us) - [ Functional Utilities ](https://www.bitovi.com/academy/learn-dom-jquery/functional-utilities.html?hsLang=en-us) - [ Finding Elements ](https://www.bitovi.com/academy/learn-dom-jquery/finding-elements.html?hsLang=en-us) - [ Traversing Elements ](https://www.bitovi.com/academy/learn-dom-jquery/traversing-elements.html?hsLang=en-us) - [ Attributes and Properties ](https://www.bitovi.com/academy/learn-dom-jquery/attributes-and-properties.html?hsLang=en-us) - [ Layout ](https://www.bitovi.com/academy/learn-dom-jquery/layout.html?hsLang=en-us) - [ Events Part 1 ](https://www.bitovi.com/academy/learn-dom-jquery/events-part-1.html?hsLang=en-us) - [ Events Part 2 ](https://www.bitovi.com/academy/learn-dom-jquery/events-part-2.html?hsLang=en-us) - [ Fn Plugins ](https://www.bitovi.com/academy/learn-dom-jquery/fn-plugins.html?hsLang=en-us) - [ Tabs Widget ](https://www.bitovi.com/academy/learn-dom-jquery/tabs-widget.html?hsLang=en-us) - [ Debug JavaScript ](https://www.bitovi.com/academy/learn-to-debug-javascript.html?hsLang=en-us) - [ Learn TypeScript ](https://www.bitovi.com/academy/learn-typescript.html?hsLang=en-us) - [ Learn React Native ](https://www.bitovi.com/academy/learn-react-native.html?hsLang=en-us) - [ Learn Web Components ](https://www.bitovi.com/academy/learn-web-components.html?hsLang=en-us) - [ Agile Program Management With Jira ](https://www.bitovi.com/academy/learn-agile-program-management-with-jira.html?hsLang=en-us) - [ Learn RxJS ](https://www.bitovi.com/academy/learn-rxjs.html?hsLang=en-us) - [ Giving a Training ](https://www.bitovi.com/academy/training.html?hsLang=en-us) - [ Learn Technology Consulting ](https://www.bitovi.com/academy/learn-technology-consulting.html?hsLang=en-us) - [ Learn React ](https://www.bitovi.com/academy/learn-react.html?hsLang=en-us) - [ Learn NgRx ](https://www.bitovi.com/academy/learn-ngrx.html?hsLang=en-us) - [ Learn Graphql ](https://www.bitovi.com/academy/learn-graphql.html?hsLang=en-us) - [ Learn Docker ](https://www.bitovi.com/academy/learn-docker.html?hsLang=en-us) - [ Learn CanJS ](https://www.bitovi.com/academy/learn-canjs.html?hsLang=en-us) - [ Learn Angular ](https://www.bitovi.com/academy/learn-angular.html?hsLang=en-us) - [ Advanced TypeScript ](https://www.bitovi.com/academy/advanced-typescript.html?hsLang=en-us) [View More Courses](https://www.bitovi.com/academy/#courses) [ ] # DOM and jQuery `page` Learn jQuery and the DOM APIs by building your own version of jQuery and using it to make a basic tabs widget. We strongly suggest finishing [Advanced JavaScript](https://www.bitovi.com/academy/learn-advanced-javascript.html?hsLang=en-us) prior to starting this course. ## Before you begin [![](https://bitovi.github.io/academy/static/img/discord.png) Click here to join the Bitovi Community Discord ](https://discord.gg/J7ejFsZnJ4) Join the Bitovi Community Discord to get help on Bitovi Academy courses or other Angular, React, CanJS and JavaScript problems. Please ask questions related to jQuery and the DOM in the [JS and DOM chat room](https://discord.gg/qxqgyGquk7). If you find bugs in this training or have suggestions, create an [issue](https://github.com/bitovi/academy/issues) or email `contact@bitovi.com`. ## Overview The end result of this training is to build a basic, [progressively enhanced](https://en.wikipedia.org/wiki/Progressive_enhancement) tabs widget that looks like: ![](https://bitovi.github.io/academy/static/img/dog-tabs.png) We will be creating simple versions of many of jQuery’s most useful methods: ``` $ = function (selector) { /*...*/ }; $.extend($.prototype, { html: function (string) { /*...*/ }, val: function (value) { /*...*/ }, text: function (string) { /*...*/ }, find: function (el) { /*...*/ }, next: function () { /*...*/ }, prev: function () { /*...*/ }, parent: function () { /*...*/ }, children: function () { /*...*/ }, attr: function (attr, val) { /*...*/ }, css: function (style, val) { /*...*/ }, width: function () { /*...*/ }, hide: function () { /*...*/ }, show: function () { /*...*/ }, }); ``` Then we will write a tabs widget: ``` $.fn.tabs = function () { /*...*/ }; ``` ## Prerequisites Creating jQuery requires meta programming (functions that take functions that return functions). We encourage participants to finish the [Advanced JavaScript](https://www.bitovi.com/academy/learn-advanced-javascript.html?hsLang=en-us) course before beginning this training. ## Next steps ✏️ Head over to the [first lesson](https://www.bitovi.com/academy/learn-dom-jquery/functional-utilities.html?hsLang=en-us) to get set up and start learning about functional utilities. ###### On this page... ###### Get help If you need [help](https://discord.gg/J7ejFsZnJ4) with an exercise, please reach out to us on [Discord](https://discord.gg/J7ejFsZnJ4) If you find a bug, please [create an issue](https://github.com/bitovi/academy/issues/new) or email [contact@bitovi.com](mailto:contact@bitovi.com?Subject=Training%20Suggestion) ## Join the Bitovi Newsletter Do you want to receive updates about new Bitovi Academy courses, Bitovi open source projects, and dev community news? If so, please provide your email. We won’t spam you or give it away for any reason! *By providing your email you agree to receive communications from Bitovi* ![](https://bitovi.github.io/academy/static/img/close.svg) ```json { "@context": "http://schema.org", "@type": "Organization", "mainEntityOfPage":{ "@type":"WebPage", "@id":"https://www.bitovi.com/academy/learn-dom-jquery.html", "description": "Learn jQuery and the DOM APIs by building your own version of jQuery and using it to make a basic tabs widget. We strongly suggest finishing [learn-advanced-javascript] prior to starting this course. " }, "url": "http://bitovi.com", "logo": "https://www.bitovi.com/hubfs/bitovi-logo-23-1.svg", "image": "https://www.bitovi.com/hubfs/bitovi-logo-x2.png", "name": "Bitovi Web App Consulting", "alternateName": "Bitovi", "naics": "541511", "description": "Bitovi is a UX, UI design and front-end JavaScript development consulting company", "address": { "@type": "PostalAddress", "streetAddress": "1134 Pine Tree Lane ", "addressLocality": "Libertyville", "addressRegion": "IL", "addressCountry": "United States", "postalCode": "60048" }, "areaServed": { "@type": "GeoCircle", "geoMidpoint": { "@type": "GeoCoordinates", "latitude": "41.8781", "longitude": "87.6298" }, "geoRadius": "5000 km" }, "telephone": "312-620-0386", "email": "contact@bitovi.com", "sameAs": [ "https://www.facebook.com/BitoviLLC/", "https://twitter.com/bitovi", "https://www.linkedin.com/company/bitovi" ] } ```