Change Content Type of Multiple files using JSOM

Question

I have a Document Library with classic Experience with a lot of file who's content type I want to change automatically in bulk

Due to the fact that I dont have access to PowerShell I was wondering is there is any way I can change the content type of multiple files using JSOM:

Answer 1

As we talked yesterday, here is the modified code snippet to update multiple file item content type:

<script type="text/javascript">
    ExecuteOrDelayUntilScriptLoaded(getItemsToBeUpdated, "sp.js");
    var collListItemToBeUpdated = "";
    var listItemToBeUpdated = "";
    function getItemsToBeUpdated() 
    {
         var clientContext = new SP.ClientContext.get_current();
         var oList = clientContext.get_web().get_lists().getByTitle('doc2');
         var camlQuery = new SP.CamlQuery();
         camlQuery.set_viewXml('<View><Query><Where><Eq>' +
            '<FieldRef Name=\'FSObjType\'/><Value Type=\'Integer\'>0</Value>' +
            '</Eq></Where></Query></View>');
         collListItemToBeUpdated = oList.getItems(camlQuery);
         clientContext.load(collListItemToBeUpdated);
         clientContext.executeQueryAsync(getItemsToBeUpdatedSuccess, getItemsToBeUpdatedFailed);
    }
    function getItemsToBeUpdatedSuccess()
    {
         ListItemToBeUpdated= collListItemToBeUpdated.getEnumerator();
         updateMultipleListItems();
    }
    function getItemsToBeUpdatedFailed(sender, args)
    {
        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
    }

    function updateMultipleListItems()
    {   
        var itemArray = [];
        var clientContext = SP.ClientContext.get_current();
        var oList = clientContext.get_web().get_lists().getByTitle('doc2');

         while(ListItemToBeUpdated.moveNext())
         {
            var oItem = ListItemToBeUpdated.get_current();
            var oListItem = oList.getItemById(oItem.get_id());
            oListItem.set_item('ContentTypeId', '0x0101009148F5A04DDD49CBA7127AADA5FB792B00AADE34325A8B49CDA8BB4DB53328F2140047E654AF66AF2C4699BC331533868D61');  
            oListItem.update();
            itemArray.push(oListItem);
            clientContext.load(itemArray[itemArray.length-1]);
         }  
        clientContext.executeQueryAsync(updateMultipleListItemsSuccess, updateMultipleListItemsFailed);
    }
    function updateMultipleListItemsSuccess() 
    {    
        alert('Items Updated');
    }

    function updateMultipleListItemsFailed(sender, args) 
    {    
        alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
    }
    </script>

In the code snippet, pass content type Id and list Title we talked yesterday, here is the test result: