Updated: Mar 18, 2019
In this article you will see how to check in a file to a document library in SharePoint 2010 using ECMAScript. I have a document library named "Shared Documents" which has the following document which is checked out.
I am going to check in that document using ECMAScript.
Navigate to the SharePoint site (I have a site page created in my site where I am going to add the content editor web part).
Go to Site Actions, click on Edit Page.
Click on the Insert tab in the ribbon interface and then click on Web Part button.
Select Media and Content in the Categories section and then click on Content Editor.