a.indexOf()

TypeError: a.indexOf is not a function blogger

This error might be caused by the jQuery event-aliases like .load(), .unload() or .error() that all methods are deprecated since jQuery 1.8.

Please check these aliases methods in your code and replace them with the .on() method instead.

As an Example,

Replace the following deprecated excerpt:

$(window).load(function(){
    //TODO
});

With the following:

$(window).on('load'function(){ 
    //TODO
});

I hope these solutions will help you a lots.
ANIL SINGH

Anil Singh is an author, tech blogger, and software programmer. Book writing, tech blogging is something do extra and Anil love doing it. For more detail, kindly refer to this link..
My Blogs - https://code-sample.com and https://code-sample.xyz
My Book1 - BEST SELLING ANGULAR BOOK (INCLUDING ALL VERSIONS 2, 4, 5, 6, 7)
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