Execute Javascript only on page load, not PostBack (SharePoint)
问题 I'm trying to execute some JavaScript on page load on a custom page on a SharePoint site (it populates the people picker with the current user). The problem is that the code executes on postback too, which I don't want as it will reset any changes to the people picker. I've tried using if(!IsPostBack) to no avail. Everything errors out at that point, giving SCRIPT5009: 'IsPostBack' is undefined. I can't find anything online to help with this. Any ideas? Thanks 回答1: You can create a function