{} and function(){} use empty objects {} to store keyValue_javascript techniques

If you try too hard, you will lose. I wrote a js tool class for manipulating URLs. This class has an attribute called queryString. My original approach was to let queryString=function(){}.

The idea is to be able to queryString Both writing methods [key] or queryString(key[,value]) are supported. Calling the key through queryString[key] is case-sensitive

and queryString(key) can be case-insensitive.

Today I found that the name parameter in the URL could not be set up. Suddenly I remembered that queryString is an anonymous function, and attributes such as name and length are read-only.

I changed it anyway. Into queryString = {}; Use another param(key[,value]) to implement the case-independent function.

I came to the conclusion today that it is best not to use function(){} to store keyValue in a field that already has built-in attributes.