Add first parameter in the query string

Question

I have a url like " http://localhost:8080/myapp?age=12&add=mumbai&name=myname " Now I want to add one parameter(tel=12345) as the first parameter in the query string like " http://localhost:8080/myapp?tel=12345&age=12&add=mumbai&name=myname "

I have tried below snippet

var str = "http://localhost:8080/myapp?age=12&add=mumbai&name=myname";

var txt2 = str.slice(0, str.indexOf("?")) + "tel=12345&" + str.slice(str.indexOf("?"));
alert(txt2);

But the result is incorrect

http://localhost:8080/myapptel=12345&?age=12&add=mumbai&name=myname

Is there a better way???

Answer 1

Try this:

 var str = "http://localhost:8080/myapp?age=12&add=mumbai&name=myname"; var txt2 = str.slice(0, str.indexOf("?")) + "?" + "tel=12345&" // ^^^^^ + str.slice(str.indexOf("?") + 1); // ^^^ alert(txt2); 

Answer 2

You need to just increment index by 1 and this will work.

Eg:

var txt2 = str.slice(0, str.indexOf("?") + 1 ) + "tel=12345&" + str.slice(str.indexOf("?") + 1);

Answer 3

var txt2=str.split('?')[0]+'?tel=12345&'+str.split('?')[1];

只是一个变化。