Get and Set User in Client People Picker using Javascript Client Object Model

Hi Readers,

There is a unique scenario where I have to pick user from a Custom People Picker on a Custom Form and then Push that User to a Client People Picker of a List Item using Javascript Client Object Model.

InOrder to achieve this functionality, I first tried to fetch the User from the Custom People Picker on the Form using JQuery,

 var displayName = $("span.ms-entity-resolved div:first-child").attr("displaytext");

Problem is I do not get the ID of this User normally. So inorder to get the 'Id' of this User I searched this User into UserInformation List and then picked the ID of this User.

 function AddItems(displayName) {

        var userInfoList = siteObjects.web.get_siteUserInfoList();
        var query = new SP.CamlQuery();
        query.set_viewXml("<View><Query><Where><Eq><FieldRef Name='Title' /><Value Type='Text'>" + displayName + "</Value></Eq></Where></Query></View>");
        siteObjects.UserCollListItem = userInfoList.getItems(query);
        siteObjects.ctx.load(siteObjects.UserCollListItem);
        siteObjects.ctx.executeQueryAsync(Function.createDelegate(null, AddItemsSuccess), Function.createDelegate(null, AddItemsFailure));
    }

Then I fetched the List Item ID :  userID = currentItem.get_item("ID");

Once I got the User ID , I can easily convert this String Type User into User Type using below code :

  var userFV = new SP.FieldUserValue();
  userFV.set_lookupId(userID);

and can easily set the People Picker List Item now

siteObjects.UserCourselistItem.set_item('UserName', userFV);

This is something very unique requirement and can be helpful for many.