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04 September 2013

Another example of web development these days

These properties don't interact correctly in Android Chrome or Android WebView:

background-attachment: fixed
background-size: covered

Work-arounds (like a position-fixed div) also don't work because of mobile Chrome's scrolling behavior:
  • When you scroll up, the tabs disappear, causing the whole viewport to shift upwards.
  • The viewport shift happens before the position fixed background updates, causing your page's background-color to be painted in the rectangle the tabs used to occupy.
  • However, the content of the page smoothly scrolls upwards, leaving a "half background image, half background color" look to your page.

Only take-away: Never use "fixed" positioning under any circumstances. You need to use JavaScript and handle scroll events.

Relevant bug threads here: Chrome, WebView
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