我如何设置查询字符串是否确实不是

Question

How can I make a javascript if function where if the query string does show as something other than undefined. Here is the code:

    var getQueryString = window.location.href.split("?")[1];
alert(getQueryString);  

Basically I wanted to do an if function in javascript. Here is the code:

    if (getQueryString = 1){
          //add code
    }

How can I set my javascript function?

Answer 1

I would use location.search and check it's length instead of your approach.

if (window.location.search.slice(1).length > 0) {
  doSomething();
}

Currently, your code will always execute because you're setting getQueryString to 1 instead of comparing it. Even if you were comparing it, it would still be false since getQueryString is a string and not a number.

Answer 2

The bellow code should work for you

var getQueryString = window.location.href.split("?")[1];

if (typeof getQueryString !== 'undefined')
{
    //Your code goes here
} else [
  alert("Query String not set");
}