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Kevin Phillips
15,693 PointsMight this be obtrusive CSS we're introducing?
Suppose JavaScript bits don't load in the page. Then by using the media query in CSS we prevent the user from seeing the navigation on mobile devices!
I think a better approach would be to use some if/else magic on $(window).width()<cutOffWidth and throwing in an event listener of the form $(window).resize(myResponsiveJSFn).
Anyone care to weigh in on the philosophy of Andrew's CSS approach versus a pure JavaScript approach?
Is there a chance JavaScript won't be available but CSS will?
3 Answers
Matthew Panton
15,228 PointsIt's much more likely that JavaScript will not be available that CSS. Using a $(window).resize() function is not really ideal because you then have to calculate the dimensions of the page each time it resizes (Note: you can't simply use $(window).width() ) because it will return a different value depending on the browser. Also If the function has to re-run each time the page is resized, this can make the page go all laggy and not good. I'd stick to using media queries but if you really wanted to use javascript, make sure you implement a debounce function to prevent the script from running more times than the browser can cope with.
Hop this helped :)
Kevin Phillips
15,693 PointsThanks Mathew!
What makes a media query faster than the JavaScript analog? Is the media query only run once and the result cached until needed?
Matthew Panton
15,228 PointsHi Kevin,
I don't know the complexities of how it all works but from experience I know media queries just work better.
Marko Paasila
6,313 PointsCan we add some css to the html or css file with jQuery? In that case the #menu li items would dissappear only if the .js file is loaded, and else be visible.