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