diff options
Diffstat (limited to 'src/css.js')
| -rw-r--r-- | src/css.js | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/css.js b/src/css.js index aea0ef2c5..cc873994b 100644 --- a/src/css.js +++ b/src/css.js @@ -358,10 +358,14 @@ jQuery.each( [ "height", "width" ], function( i, dimension ) { set: function( elem, value, extra ) { var matches, styles = getStyles( elem ), - scrollBoxSize = support.scrollboxSize() === styles.position, + + // Only read styles.position if the test has a chance to fail + // to avoid forcing a reflow. + scrollboxSizeBuggy = !support.scrollboxSize() && + styles.position === "absolute", // To avoid forcing a reflow, only fetch boxSizing if we need it (gh-3991) - boxSizingNeeded = scrollBoxSize || extra, + boxSizingNeeded = scrollboxSizeBuggy || extra, isBorderBox = boxSizingNeeded && jQuery.css( elem, "boxSizing", false, styles ) === "border-box", subtract = extra ? @@ -376,7 +380,7 @@ jQuery.each( [ "height", "width" ], function( i, dimension ) { // Account for unreliable border-box dimensions by comparing offset* to computed and // faking a content-box to get border and padding (gh-3699) - if ( isBorderBox && scrollBoxSize ) { + if ( isBorderBox && scrollboxSizeBuggy ) { subtract -= Math.ceil( elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ] - parseFloat( styles[ dimension ] ) - |