My ribbon page menu suddenly stopped working this afternoon. Clicking the page menu gave me the loading icon without any progress.
After some investigation I found out that the code which I added this morning is the problem.
String.prototype.startsWith = function(str){
return (this.toLowerCase().indexOf(str) == 0);
}
Apparently “startsWith” is a reserved word so changing the function name into another name fixed the problem.
A friend of mine told me “SharePoint keeps you young by forcing you to learn new stuffs almost everyday”.
And he is right J
