I must add a JavaScript to Sharepoint 2013.
I must add by JavaScript dropdownlist with links. How could I add a Link to dropDownList which will work at site Sharepoint 2013.
you can reference scripts in the masterpage of this forma:
<SharePoint:ScriptLink language="javascript" name="custom.js" OnDemand="true" runat="server" Localizable="false" />
Referncing a java script inside my master page will not fire
You can either add directly into the sharepoint page where sharepoint list sits using content editor webpart, or use Script editor webpart. You can also inject javascript in list view webpart using JSlink.