<div>
You can use these scripts<br />
<a href="https://github.com/mar10/fancytree" rel="ugc">https://github.com/mar10/fancytree</a><br />
<a href="http://wwwendt.de/tech/fancytree/demo/" rel="ugc">http://wwwendt.de/tech/fancytree/demo/</a><br />
<br />
<a href="http://jonmiles.github.io/bootstrap-treeview/" rel="ugc">http://jonmiles.github.io/bootstrap-treeview/</a><br />
<a href="https://github.com/jonmiles/bootstrap-treeview" rel="ugc">https://github.com/jonmiles/bootstrap-treeview</a><br />
<br />
<a href="https://xevin.ru/treemenu-js-examples/" rel="ugc">https://xevin.ru/treemenu-js-examples/</a><br />
<a href="https://github.com/xevin/jquery.treemenu.js" rel="ugc">https://github.com/xevin/jquery.treemenu.js</a>
</div>


You can use these scripts
https://github.com/mar10/fancytree [https://github.com/mar10/fancytree]
http://wwwendt.de/tech/fancytree/demo/ [http://wwwendt.de/tech/fancytree/demo/]

http://jonmiles.github.io/bootstrap-treeview/ [http://jonmiles.github.io/bootstrap-treeview/]
https://github.com/jonmiles/bootstrap-treeview [https://github.com/jonmiles/bootstrap-treeview]

https://xevin.ru/treemenu-js-examples/ [https://xevin.ru/treemenu-js-examples/]
https://github.com/xevin/jquery.treemenu.js [https://github.com/xevin/jquery.treemenu.js]

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I have a navigation bar on the left side of the product category per the attached image. There is a &nbsp;vertical scroll bar. Inside &nbsp;the bar, there are titles with arrows, when user clicks the arrows, and it will expand and see the contents. When user checks the checkbox, it will expand again. When users selects the checkbox, it will go to the linked page. On the linked page, the checkbox the users just selected should still be collapsed instead of hiding, with the check mark checked &nbsp; Any simple example?<br />
<a href="https://filedb.experts-exchange.com/incoming/2018/12_w49/1406542/Navigation-bar.jpg" target="_blank" class="file-inline" title="Navigation-bar.jpg (4 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Navigation-bar.jpg</a>
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Navigation-bar.jpg

I have a navigation bar on the left side of the product category per the attached image. There is a  vertical scroll bar. Inside  the bar, there are titles with arrows, when user clicks the arrows, and it will expand and see the contents. When user checks the checkbox, it will expand again. When users selects the checkbox, it will go to the linked page. On the linked page, the checkbox the users just selected should still be collapsed instead of hiding, with the check mark checked   Any simple example?

Navigation

Cascading Style Sheets (CSS) is a language used for describing the look and formatting of a document written in a markup language. Usually used to change web pages and user interfaces written in HTML, it can also be applied to any kind of XML document. CSS is designed primarily to distinguish the content of a document from its presentation.

HTML (HyperText Markup Language) is the main markup language for creating web pages and other information to be displayed in a web browser, providing both the structure and content for what is sent from a web server through the use of tags. The current implementation of the HTML specification is HTML5.

HTML

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.