Html: How to access outer javascript code from an iframe

Question

Before i explain the problem please understand that i am not trying to access a DOM element but rather some js code from inside the iframe.

Consider my structure

<body>
    <script>
      class PlayerClient{
          constructor(){
              alert('Successfuly called')
          }
      }
    </script>

 <section id="The-Big-Picture">
    <iframe src="/app/explore/sp/home" frameborder="0" width="100%" height="91%">
        Sorry your browser does not support inline frames.
    </iframe>
 </section>
</body>

This iframe is SAMEORIGIN and all i'm trying todo is to instantiate the class PlayerClient from inside the iframe like so new window.parent.PlayerClient(). Why would i want to do this? Because i found it to be DRYer declaring the class in one location only.

Here is an image of the HTML structure

The blue highlight returns undefined

dunhuang · Accepted Answer · 2020-10-24 16:04:22Z

1

Because you can't access window.PlayerClient even in the parent window. In this aspect, class is just like let or const, unlike var. You can get the explanation as Global constants do not become properties of the window object, unlike var variables. go https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const

answered Oct 24, 2020 at 16:04

dunhuang

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Comments

vitkarpov · Accepted Answer · 2020-10-24 15:34:38Z

0

Could that be because scripts haven't been loaded yet in the parent window?

answered Oct 24, 2020 at 15:34

vitkarpov

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1 Comment

vitkarpov Over a year ago

I guess it's not the case if your script is inline though.

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