Urlsearchparams interface Definition processing URL parameter string

The basic use method is as follows

/** Urlsearchparams Attribute * @ Syntax: new urlsearchparams (parameter);*/(function(){    varstr = "http://www.domain.com/?user=Alan&id=123&id=456"; varSearchparams =Newurlsearchparams (str); //let...of Syntax (Iteration object)     for(let p of Searchparams) {//Console.log (p);    }/** Urlsearchparams.append () * @ Add new key/value to URL*/Searchparams.append ("City", encodeURIComponent ("Shenzhen"));/** Urlsearchparams.has () * @ query is present, returns a Boolean value*/Searchparams.has ("id");//true/** Urlsearchparams.get () * @ Returns the first value associated*/Searchparams.get ("id");//123/** Urlsearchparams.getall () * @ Returns all values of the same key*/Searchparams.getall ("id");//["123", "456"]/** Urlsearchparams.set () * @ Sets the value of key, if there are multiple, delete the other*/Searchparams.set ("id", "789");/** Searchparams.delete () * @ Delete all parameter lists key and value values, duplicate keys are deleted*/Searchparams.Delete("id");/** searchparams.entries () * @ returns all key-value pairs Key/value*/     for(Let pair of searchparams.entries ()) {Console.log (pair[0]+ ', ' + pair[1]); }/** Searchparams.keys () * @ return all keys key*/     for(Let key of Searchparams.keys ()) {Console.log (key); }/** searchparams.values () * @ return all values*/     for(Let value of Searchparams.values ()) {Console.log (value); }/** searchparams.tostring () * @ return the modified URL*/searchparams.tostring (); Console.log (Searchparams.tostring ());} ());

JS write function resolves all parameters from the following URL string

http://www.domain.com/?user=anonymous&id=123&id=456&city=%E5%8C%97%E4%BA%AC&d &enabled

The expected return result format is as follows:

{  ' anonymous ',  ID: [123, 456],     ///  repeat key to assemble an array, which can be converted into a number type City  : ' Beijing ',        // English  true,      //  the key contract value of unspecified value is true}

Make sure you know the problem before you start. How do you figure out the problem? To clearly enter the characteristics, whether there will be a variety of strange input

Defensive programming, detecting if it is a string

functionParse (str) {if(typeofSTR!== "string"){            return; }        varParamobj = {}; vardecode = decodeuricomponent (str);//Decode First        varParsepart = Decode.split ("? #") [Decode.split ("? #"). Length-1];//truncation does not require part        varParamarr = Parsepart.split ("&");  for(vari = 0; i < paramarr.length; i++){            varTMP = paramarr[i].split ("="); varKey = Tmp[0]; varValue = Tmp[1] | |true; //console.log ("keyword is:" + key, "value is:" + value);            if(typeofParamobj[key] = = = "undefined") {Paramobj[key]=value; }Else{                varNewValue = Paramobj[key] + "," + value;//There are multiple duplicate first connection strings before splitting openParamobj[key] = Newvalue.split (","); }        }        //Console.log (paramobj);}

Urlsearchparams interface Definition processing URL parameter string