Mathew Kurian mathew-kurian

## what-forces-layout.md

      
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                mathew-kurian
                / what-forces-layout.md
            
            
              Created
              January 9, 2017 09:03
                — forked from paulirish/what-forces-layout.md
            
              
                What forces layout/reflow. The comprehensive list.
              
          
    What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Element

Box metrics


elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
elem.getClientRects(), elem.getBoundingClientRect()