My customer want a FAQ page like in this link https://www.microsoft.com/en-in/download/faq.aspx
Pls suggest how can I achieve these Drop downs in SharePoint.
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You can use jQuery UI accordion for this. See: https://jqueryui.com/accordion
I hope this link could help you, all you need is Accordion Menu. ACCORDION JQUERY
Please check the link below where you can find a step-by-step sample of using CSR to show your SharePoint List View using Accordion control:
Another simple out of box solution will be to create Group by view for your FAQ list.
Steps will be as below
Here is video tutorial on creating group by view: https://www.youtube.com/watch?v=XWHiRCJ7fVM
Follow this example : Source code is avaialbe : Hope this helps