I have SharePoint on-premises 2013, where inside some site collections, I define JSLINKs as follow, to disable site columns inside the quick edit grids:-

(function () {     var overrideContext = {};     overrideContext.Templates = overrideContext.Templates || {};     overrideContext.Templates.OnPreRender = function(ctx) {         var statusField = ctx.ListSchema.Field.filter(function(f) {             return f.Name === 'ItemNumber';         });         if (statusField.length>0) {             statusField[0].AllowGridEditing = false;         }     }     SPClientTemplates.TemplateManager.RegisterTemplateOverrides(overrideContext); })(); 

then I associate the site columns with the above JSLINK using this PowerShell:

$  web = Get-SPWeb http://~******/ $  field = $  web.Fields["Item Number"] $  field.JSLink = "~siteCollection/Style Library/JS/HideItemNumberInQuickEdit.js" $  field.update($  true) 

now I have migrated my site collections from SharePoint 2013 on-premises to office 365, using a third part tool. but I have noted that the site columns were enabled inside the quick grid edit, inside SP online. so I am not sure, if there is a way to reassign the jslink to my online sitecolumns? of course the JSLINK file HideItemNumberInQuickEdit.js itself were migrated correctly.

second question. if I manage to re-assign the JSLINK, then will my above JSLINK be able to disable the site column inside the quick edit grid even on the modern user interface inside SharePoint 365?

thanks