Hello everybody,
I am building an application in Elm and I need to call an external JS
library that interacts directly with the DOM (in my case, highlights a
<pre><code> section). I built a port to communicate from Elm to Javascript
and, on the Javascript side, I'd like to call my external library as soon
as the element appears on the page.
My first try was to use the port command in the init function on my Elm
application, but this doesn't seem to work, because when the JS callback is
executed, the element of the DOM I need to interact with is not present yet.
For the moment I solved it on the Javascript side, just by retrying until
the element is actually present, with something like this:
var highlightWhenReady = function () {
if (!document.getElementById("part-to-highlight")) {
window.requestAnimationFrame(highlightWhenReady);
}
hljs.highlightBlock(document.getElementById("part-to-highlight"));
};
but it seems really dirty, and certainly not the Elm way to do it.
What is the recommended way to do such things the Elm way? How could I know
when the DOM element actually got rendered in the page?
Thank you!
marco
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