I have a web part that works for every browser but not in IE.
It seems to have troubles with "startsWith" which is a function that is not supported in IE11, fair enough. But when I changed the code for a one that is supported by IE11, I still get the same error. Only places where I could find non-supported functions for IE11 is in the temporary .js files. I have tried a gulp clean and run but it doesn't work. How can I make my code compatible/compiled to IE11 friendly code?