Usage no npm install needed!

<script type="module">
  import crossDomainEvents from 'https://cdn.skypack.dev/cross-domain-events';
</script>

README

cross-domain-events

An event-like interface to postMessage for cross domain communication.

postMessage was implemented in Internet Explorer 8, but only supports sending text strings. Modern browsers can send objects, but if you want to listen for different kind of objects you have to implement your own delegation.

Example

// notify parent about page size
xde.sendTo(window.top, "resize", {
    width: iframe.clientWidth,
    height: iframe.clientHeight
});

// parent page
xde.on("resize", function (evt) {
    var iframe = document.getElementById("theiframe");
    iframe.style.width = evt.data.width;
    iframe.style.height = evt.data.height;
});

Works in IE8 & IE9 as long as you have ES5-shim (for Array.prototype.filter) and JSON.js already.

License

MIT