引导3导航崩溃不起作用。

I have referred to a number of articles and I cannot figure out why my collapse function (and any other js i insert) is not working. I have included both .js and jquery links in my header. I have also scanned and scanned my code. I will put in my code for the nav and if needed provide a link to the whole codepen.I have referred to a number of articles and I c