1- Open the site and then go to site setting and select Add an app.
2- In the left navigation bar, there is two option for adding the app.
3- First is Apps you can add – Default apps available in site collection you select and add it.
4- Second From your Organization – a Custom app that is uploaded by you in the app catalog site.
5- Now select the app and add your site collection.
6- Click on Trust it and wait some time.
7- Now you able to use that app in your site collection.
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51 JSOM Examples in SharePoint Online
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About Navneet Singh
I am Navneet Singh, Working at C3it software solutions pvt. ltd. in Pune. My core skills are SharePoint 2013, Office 365, SharePoint 2010, SharePoint Designer, SharePoint Designer Workflow, Nintex Workflow, Infopath, Webpart, CSOM/SSOM, Power-shell, C#, ASP.NET and SQL Server.
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