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Hey there, As in my experiment it is very important that stimuli will be presented in the same size for all subjects, I was wondering whether there is any way to disable browser zooming during the experiment. I'm using the 'resize' plugin and 'fullscreen' plugin, but as long that zoom is enabled I can't be really sure about the stimuli size. Thanks! |
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Replies: 2 comments 2 replies
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Hi @yuvalharr, Not that I know of. I suspect it is not possible because that would get in the way of accessibility, which browsers are interested in maintaining. You can detect zoom events though: var zoom_event = [];
window.onresize = function(){
console.log(window.devicePixelRatio);
zoom_event.push({timestamp: performance.now(), zoom_ratio: window.devicePixelRatio});
}
// add this trial to your timeline near the end of the experiment
// this will store the zoom_event data in the data for this trial.
var record_zoom_events = {
type: 'call-function',
func: function(){
return JSON.stringify(zoom_event);
}
}I'd suggest:
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Edit: My suggestion below to add the viewport settings in a I think this is possible using a <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">But from this page I see that some browsers might choose to ignore the |
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I'm not sure, but this may only work on mobile (and only some mobile browsers may honor it). When I tried using this tag on a Chrome desktop I was still able to zoom in and out. |
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Ah, yes, you're absolutely right! Apparently the meta viewport settings only apply to mobile devices and are ignored by desktop browsers. I'll edit my response. |
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Hi @yuvalharr,
Not that I know of. I suspect it is not possible because that would get in the way of accessibility, which browsers are interested in maintaining.
You can detect zoom events though:
I'd suggest: