Can use pushState

Question

Does anyone know of a library that determines if pushState can be used?

I was using this:

if(window.history.pushState){
    window.history.pushState(         


        

Answer 1

pushState is part of the HTML5 History API. You can test for support using regular JavaScript like so:

if (typeof history.pushState !== "undefined") {
    // pushState is supported!
}

Alternatively, you can use the Modernizr library:

if (Modernizr.history) {
     // pushState is supported!
}

Answer 2

Looking at the Modernizer source code this is how it checks for push state:

  tests['history'] = function() {
      return !!(window.history && history.pushState);
  };

So a simple way for you would just be:

var hasPushstate = !!(window.history && history.pushState);

One must first check for the existence of window.history before going two levels deep and that's probably why you were experiencing an error.