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1 define( [
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2 "../../core",
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3 "../../selector"
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4
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5 // css is assumed
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6 ], function( jQuery ) {
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7 "use strict";
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8
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9 // isHiddenWithinTree reports if an element has a non-"none" display style (inline and/or
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10 // through the CSS cascade), which is useful in deciding whether or not to make it visible.
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11 // It differs from the :hidden selector (jQuery.expr.pseudos.hidden) in two important ways:
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12 // * A hidden ancestor does not force an element to be classified as hidden.
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13 // * Being disconnected from the document does not force an element to be classified as hidden.
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14 // These differences improve the behavior of .toggle() et al. when applied to elements that are
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15 // detached or contained within hidden ancestors (gh-2404, gh-2863).
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16 return function( elem, el ) {
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17
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18 // isHiddenWithinTree might be called from jQuery#filter function;
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19 // in that case, element will be second argument
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20 elem = el || elem;
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21
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22 // Inline style trumps all
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23 return elem.style.display === "none" ||
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24 elem.style.display === "" &&
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25
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26 // Otherwise, check computed style
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27 // Support: Firefox <=43 - 45
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28 // Disconnected elements can have computed display: none, so first confirm that elem is
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29 // in the document.
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30 jQuery.contains( elem.ownerDocument, elem ) &&
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31
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32 jQuery.css( elem, "display" ) === "none";
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33 };
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34 } );
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