The JS function has the same name as the variable

Console.log (a); var a = 3; function A () {}

The result of the output is: [Function:a]

Pay attention to the time to know why!

1) function declaration is pinned
2) Variable declaration will also be pinned
3) function declaration is more sticky than variable declaration :)
4) Variables and assignment statements are written together, in the JS engine parsing, it will be split into declaration and assignment 2 parts, the declaration of the top , the assignment is retained in the original position
5) declared variables are not repeated

By the above rule code is equivalent to

function A () {} var A; // actual Invalid  = 3;

The JS function has the same name as the variable