Dimensions: fall back to offsetWidth/Height for border-box in IE

- Use getClientRects() to explicitly detect hidden/disconnected
  elements

Close gh-4223
Fixes gh-4102

src/css.js

@@ -1,9 +1,7 @@
 define( [
 	"./core",
-	"./var/pnum",
 	"./core/access",
 	"./core/camelCase",
-	"./var/document",
 	"./var/rcssNum",
 	"./css/var/rnumnonpx",
 	"./css/var/cssExpand",
@@ -18,7 +16,7 @@ define( [
 	"./core/init",
 	"./core/ready",
 	"./selector" // contains
-], function( jQuery, pnum, access, camelCase, document, rcssNum, rnumnonpx, cssExpand,
+], function( jQuery, access, camelCase, rcssNum, rnumnonpx, cssExpand,
 	getStyles, swap, curCSS, adjustCSS, addGetHookIf, support, finalPropName ) {
 
 "use strict";
@@ -122,7 +120,8 @@ function getWidthOrHeight( elem, dimension, extra ) {
 	var styles = getStyles( elem ),
 		val = curCSS( elem, dimension, styles ),
 		isBorderBox = jQuery.css( elem, "boxSizing", false, styles ) === "border-box",
-		valueIsBorderBox = isBorderBox;
+		valueIsBorderBox = isBorderBox,
+		offsetProp = "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 );
 
 	// Support: Firefox <=54
 	// Return a confounding non-pixel value or feign ignorance, as appropriate.
@@ -133,22 +132,26 @@ function getWidthOrHeight( elem, dimension, extra ) {
 		val = "auto";
 	}
 
-	// Check for style in case a browser which returns unreliable values
-	// for getComputedStyle silently falls back to the reliable elem.style
-	valueIsBorderBox = valueIsBorderBox &&
-		( support.boxSizingReliable() || val === elem.style[ dimension ] );
 
 	// Fall back to offsetWidth/offsetHeight when value is "auto"
 	// This happens for inline elements with no explicit setting (gh-3571)
 	// Support: Android <=4.1 - 4.3 only
 	// Also use offsetWidth/offsetHeight for misreported inline dimensions (gh-3602)
-	if ( val === "auto" ||
-		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) {
-
-		val = elem[ "offset" + dimension[ 0 ].toUpperCase() + dimension.slice( 1 ) ];
-
-		// offsetWidth/offsetHeight provide border-box values
-		valueIsBorderBox = true;
+	// Support: IE 9-11 only
+	// Also use offsetWidth/offsetHeight for when box sizing is unreliable
+	// We use getClientRects() to check for hidden/disconnected.
+	// In those cases, the computed value can be trusted to be border-box
+	if ( ( isBorderBox && !support.boxSizingReliable() || val === "auto" ||
+		!parseFloat( val ) && jQuery.css( elem, "display", false, styles ) === "inline" ) &&
+		elem.getClientRects().length ) {
+
+		// Where available, offsetWidth/offsetHeight approximate border box dimensions.
+		// Where not available (e.g., SVG), assume unreliable box-sizing and interpret the
+		// retrieved value as a content box dimension.
+		valueIsBorderBox = offsetProp in elem;
+		if ( valueIsBorderBox ) {
+			val = elem[ offsetProp ];
+		}
 	}
 
 	// Normalize "" and auto

test/data/testsuite.css

@@ -142,3 +142,7 @@ section { background:#f0f; display:block; }
 	padding: 0;
 	margin: 0;
 }
+
+.border-box, .border-box * {
+	box-sizing: border-box;
+}

test/unit/dimensions.js

@@ -659,7 +659,9 @@ QUnit.test( "interaction with scrollbars (gh-3589)", function( assert ) {
 		parent = jQuery( "<div/>" )
 			.css( { position: "absolute", width: "1000px", height: "1000px" } )
 			.appendTo( "#qunit-fixture" ),
-		fraction = jQuery( "<div style='width:4.5px;'/>" ).appendTo( parent ).width() % 1,
+		fraction = jQuery.support.boxSizingReliable() ?
+			jQuery( "<div style='width:4.5px;'/>" ).appendTo( parent ).width() % 1 :
+			0,
 		borderWidth = 1,
 		padding = 2,
 		size = 100 + fraction,
@@ -695,10 +697,8 @@ QUnit.test( "interaction with scrollbars (gh-3589)", function( assert ) {
 			borderBox[ 0 ].offsetWidth;
 
 	if ( borderBoxLoss > 0 ) {
-		borderBox.css( {
-			width: ( size + borderBoxLoss ) + "px",
-			height: ( size + borderBoxLoss ) + "px"
-		} );
+		borderBox[ 0 ].style.width = ( size + borderBoxLoss ) + "px";
+		borderBox[ 0 ].style.height = ( size + borderBoxLoss ) + "px";
 	}
 
 	for ( i = 0; i < 3; i++ ) {
@@ -750,4 +750,26 @@ QUnit.test( "interaction with scrollbars (gh-3589)", function( assert ) {
 	}
 } );
 
+QUnit.test( "outerWidth/Height for table cells and textarea with border-box in IE 11 (gh-4102)", function( assert ) {
+	assert.expect( 5 );
+	var $table = jQuery( "<table class='border-box' style='border-collapse: separate' />" ).appendTo( "#qunit-fixture" ),
+		$thead = jQuery( "<thead />" ).appendTo( $table ),
+		$firstTh = jQuery( "<th style='width: 200px;padding: 5px' />" ),
+		$secondTh = jQuery( "<th style='width: 190px;padding: 5px' />" ),
+		$thirdTh = jQuery( "<th style='width: 180px;padding: 5px' />" ),
+		$td = jQuery( "<td style='height: 20px;padding: 5px;border: 1px solid'>text</td>" ),
+		$tbody = jQuery( "<tbody />" ).appendTo( $table ),
+		$textarea = jQuery( "<textarea style='height: 0;padding: 2px;border: 1px solid;box-sizing: border-box' />" ).appendTo( "#qunit-fixture" );
+	jQuery( "<tr />" ).appendTo( $thead ).append( $firstTh );
+	jQuery( "<tr />" ).appendTo( $thead ).append( $secondTh );
+	jQuery( "<tr />" ).appendTo( $thead ).append( $thirdTh );
+	jQuery( "<tr><td></td></tr>" ).appendTo( $tbody ).append( $td );
+
+	assert.strictEqual( $firstTh.outerWidth(), 200, "First th has outerWidth 200." );
+	assert.strictEqual( $secondTh.outerWidth(), 200, "Second th has outerWidth 200." );
+	assert.strictEqual( $thirdTh.outerWidth(), 200, "Third th has outerWidth 200." );
+	assert.strictEqual( $td.outerHeight(), 30, "outerHeight of td with border-box should include padding." );
+	assert.strictEqual( $textarea.outerHeight(), 6, "outerHeight of textarea with border-box should include padding and border." );
+} );
+
 } )();