Ok, I think I get it, 'canvas' will end up bound to the value returned by
the function call, not the function itself so it is indeed a way to call an
'init' function once! Is that about right?
On Thursday, March 31, 2022 at 1:34:41 PM UTC+13 Mark Sibly wrote:
> Hi,
>
> I'm a little confused by this code in index.html:
> ```
> canvas: (function() {
>
> var canvas = document.getElementById('canvas');
> canvas.addEventListener("webglcontextlost", function(e) {
> alert('WebGL context lost. You will need to reload the page.');
> e.preventDefault(); }, false);
>
> return canvas;
> })(),
> ```
> What's the deal with the weird `(function(){...})();` syntax? Other
> functions in index.html don't seem to do this.
>
> Is it something to do with only running the function code once? Otherwise
> it seems like a weglcontextlost listener would be added each time canvas()
> was called!
>
> Bye,
> Mark
>
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