Uncaught Typeerror: Url Is Not A Constructor In Javascript

my code let url = new URL('http://www.test.com/t.html?a=1&b=3&c=m2-m3-m4-m5'); let searchParams = new URLSearchParams(url.search); console.log(searchParams.get('c')); //

Solution 1:

The only thing that would cause this error in any recent version of Chrome (at least since 2014's v32) would be if you had some other code that overwrote the URL symbol.

For example

constURL = 'I am now a string'// later...let url = newURL('http://www.test.com/t.html?a=1&b=3&c=m2-m3-m4-m5');

If you're having trouble locating the code that's overwriting URL, you could start by simply adding

console.log(URL)

to your code. The value logged may give you a hint. Otherwise, see this post ~ How to know in which file that defined a js global var in chrome console?

---

Solutions:

• Try not to use global object names in your variables.
• Don't assign global variables if you can help it.

On that last note, you could avoid this problem like this

(function() {
  constURL = 'I am a string but not window.URL'// later...let url = newwindow.URL('http://www.test.com/t.html?a=1&b=3&c=m2-m3-m4-m5');
  console.info(url.search)
})()

Solution 2:

The problem occurs because url.URL is undefined (read more in this comment).