How to Get current loggedin user in Sharepoint using Javascript

This a script that gets the current logged-in user’s name from the welcome menu and populates it in a People Picker control.

Firstly, to run the function on page sharepoint load user spBodyOnLoadFunctionNames something like below.

_spBodyOnLoadFunctionNames.push(“AddCurrentUserToPP”);

Next add this script in any content editor webpart or just on your custom page.

function AddCurrentUserToPP()
 {
 var currentUser = GetUser();
 if(currentUser != null)
 {
 var pp = GetPeoplePickerText(document.getElementById(‘PeoplePickerId’).parentNode);
 
//set the People picker field to current user
 if(pp != null)
 pp.innerText = currentUser;
 }
 }
 
function GetUser()
 {
 var tags = document.getElementsByTagName(‘a’);
 for (var i=0; i < tags.length; i++)
 {
 if(tags[i].innerText.substr(0,7) == ‘Welcome’)
 {
 return tags[i].innerText.substr(8,tags[i].innerText.length);
 }
 }
 
}
 
function GetPeoplePickerText(container)
 {
 var result  = “”;
 
var _divs = container.getElementsByTagName(“DIV”);
 for(var k=0; k < divs.length; k++)
 {
 if(divs[k].id.indexOf(identifier) > 0 && divs[k].id.indexOf(“UserField_upLevelDiv”) > 0)
 {
 result = divs[k];
 break;
 // You can also access the text in the control by using the below
 var innerSpans = divs[k].getElementsByTagName(“SPAN”);
 for(var j=0; j < innerSpans.length; j++)
 { if(innerSpans[j].id == ‘content’)
 { return innerSpans[j].innerHTML;}
 }
 
}
 return result;
 }