![]() Thus I could not test these effects in WebViews.Įven more oddly, although full browsers generally support the changing of the meta viewport in JavaScript, all Android WebViews refuse to do so. It has a fixed toolbar that never disappears, and if you change the device orientation it resets to the default page. I use the HTML5 Test Android app for WebView tests. For instance, some browsers have fixed toolbars, which makes it both pointless and impossible to run the toolbar test. Untestable or ?: The browser or device does not support the action involved. We need an event that fires when the user zooms. In general browsers agree that incoming or exiting toolbars cause a resize, but zooming does not. All these actions change the dimensions of the visual viewport. I tested orientationchange, zoom, and showing and hiding the browser bar and the software keyboard. Visual viewportĬhanges to the visual viewport are a problem. Browsers seem to agree that this is a true resize. In general, the event fires in these circumstances. ![]() The layout viewport’s dimensions are changed when the contents of the meta viewport tag are changed or the device changes orientation. ![]() See this page for a visualisation of the visual and layout viewports. The question is whether their resizing triggers a resize event. Resizing takes place all the time, but we have to distinguish between the visual and the layout viewport, both of which may be resized by user actions. ![]() But which viewport? Browsers generally support the resizing of the layout viewport, but it seems visual viewport resize support is on the way out. The resize event fires when a viewport is resized. Here are the results of my research into the firing of the resize event in the mobile browsers. ![]()
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