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comparison default/node_modules/jquery/src/css/support.js @ 0:1d038bc9b3d2 default tip

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Up:default
author Liny <dev@neowd.com>
date Sat, 31 May 2025 09:21:51 +0800
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-1:000000000000 0:1d038bc9b3d2
1 define( [
2 "../core",
3 "../var/document",
4 "../var/documentElement",
5 "../var/support"
6 ], function( jQuery, document, documentElement, support ) {
7
8 "use strict";
9
10 ( function() {
11
12 // Executing both pixelPosition & boxSizingReliable tests require only one layout
13 // so they're executed at the same time to save the second computation.
14 function computeStyleTests() {
15
16 // This is a singleton, we need to execute it only once
17 if ( !div ) {
18 return;
19 }
20
21 container.style.cssText = "position:absolute;left:-11111px;width:60px;" +
22 "margin-top:1px;padding:0;border:0";
23 div.style.cssText =
24 "position:relative;display:block;box-sizing:border-box;overflow:scroll;" +
25 "margin:auto;border:1px;padding:1px;" +
26 "width:60%;top:1%";
27 documentElement.appendChild( container ).appendChild( div );
28
29 var divStyle = window.getComputedStyle( div );
30 pixelPositionVal = divStyle.top !== "1%";
31
32 // Support: Android 4.0 - 4.3 only, Firefox <=3 - 44
33 reliableMarginLeftVal = roundPixelMeasures( divStyle.marginLeft ) === 12;
34
35 // Support: Android 4.0 - 4.3 only, Safari <=9.1 - 10.1, iOS <=7.0 - 9.3
36 // Some styles come back with percentage values, even though they shouldn't
37 div.style.right = "60%";
38 pixelBoxStylesVal = roundPixelMeasures( divStyle.right ) === 36;
39
40 // Support: IE 9 - 11 only
41 // Detect misreporting of content dimensions for box-sizing:border-box elements
42 boxSizingReliableVal = roundPixelMeasures( divStyle.width ) === 36;
43
44 // Support: IE 9 only
45 // Detect overflow:scroll screwiness (gh-3699)
46 div.style.position = "absolute";
47 scrollboxSizeVal = div.offsetWidth === 36 || "absolute";
48
49 documentElement.removeChild( container );
50
51 // Nullify the div so it wouldn't be stored in the memory and
52 // it will also be a sign that checks already performed
53 div = null;
54 }
55
56 function roundPixelMeasures( measure ) {
57 return Math.round( parseFloat( measure ) );
58 }
59
60 var pixelPositionVal, boxSizingReliableVal, scrollboxSizeVal, pixelBoxStylesVal,
61 reliableMarginLeftVal,
62 container = document.createElement( "div" ),
63 div = document.createElement( "div" );
64
65 // Finish early in limited (non-browser) environments
66 if ( !div.style ) {
67 return;
68 }
69
70 // Support: IE <=9 - 11 only
71 // Style of cloned element affects source element cloned (#8908)
72 div.style.backgroundClip = "content-box";
73 div.cloneNode( true ).style.backgroundClip = "";
74 support.clearCloneStyle = div.style.backgroundClip === "content-box";
75
76 jQuery.extend( support, {
77 boxSizingReliable: function() {
78 computeStyleTests();
79 return boxSizingReliableVal;
80 },
81 pixelBoxStyles: function() {
82 computeStyleTests();
83 return pixelBoxStylesVal;
84 },
85 pixelPosition: function() {
86 computeStyleTests();
87 return pixelPositionVal;
88 },
89 reliableMarginLeft: function() {
90 computeStyleTests();
91 return reliableMarginLeftVal;
92 },
93 scrollboxSize: function() {
94 computeStyleTests();
95 return scrollboxSizeVal;
96 }
97 } );
98 } )();
99
100 return support;
101
102 } );