JS how to calculate the number of occurrences of a character in a string

JS how to calculate the number of occurrences of a character in a string:
In practice, you might want to calculate the number of occurrences of a character in a string, and there are many ways to do this, and here's a very simple way to do it.
The code example is as follows:

function func (str,char) {  var str=str;   var num= (Str.split (char)). Length-1;   return Num}document.write (func ("Abcdefga", "a"));

The code above can be implemented to calculate the number of occurrences of a specified character in a string.
Related reading:
The split () function can be found in the J The split () method of the Avascript string Object a chapter.

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JS how to calculate the number of occurrences of a character in a string