![]() Forced reflow while executing javascript windows#Since there are three gaps with no layout shifts, there are three session windows in the example. When the next layout shift occurs, a new session window starts. A session window starts with the first layout shift and continues to expand until there is a gap with no layout shifts. You'll notice above that the blue bars have different heights those represent the score of each individual layout shift. In the example above, many layout shifts occur over time as the user views the page. To review session windows, here's an example: Example of a session window. The feedback we received from developers overwhelmingly favored the session window strategy because it groups the layout shifts together most intuitively. In our earlier post, we covered a few different windowing strategies for grouping together layout shifts while ensuring the score doesn't grow unbounded. Decision points # Why a session window? # So there is no need to be concerned that this change will worsen the scores for your site.
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