Resolve the problem that the custom $of id method conflicts with the jquery selector $

Change your function name:

Save trouble is also simple, direct batch replacement can be.

Code first:

var $= function (id) { 
return "string" == typeof id ? document.getElementById(id) : id; 
}; 

This code is modeled after the jquery custom id selector method, but since the jquery selector also USES this "$", if you refer to jquery and use this method, the page will report an error.

ar getId = function (id) { 
return "string" == typeof id ? document.getElementById(id) : id; 
};