Project import generated by Copybara.
GitOrigin-RevId: 63746295f1a5ab5a619056791995793d65529e62
diff --git a/node_modules/jquery/src/css/var/isHiddenWithinTree.js b/node_modules/jquery/src/css/var/isHiddenWithinTree.js
new file mode 100644
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+++ b/node_modules/jquery/src/css/var/isHiddenWithinTree.js
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+define( [
+ "../../core",
+ "../../core/isAttached"
+
+ // css is assumed
+], function( jQuery, isAttached ) {
+ "use strict";
+
+ // isHiddenWithinTree reports if an element has a non-"none" display style (inline and/or
+ // through the CSS cascade), which is useful in deciding whether or not to make it visible.
+ // It differs from the :hidden selector (jQuery.expr.pseudos.hidden) in two important ways:
+ // * A hidden ancestor does not force an element to be classified as hidden.
+ // * Being disconnected from the document does not force an element to be classified as hidden.
+ // These differences improve the behavior of .toggle() et al. when applied to elements that are
+ // detached or contained within hidden ancestors (gh-2404, gh-2863).
+ return function( elem, el ) {
+
+ // isHiddenWithinTree might be called from jQuery#filter function;
+ // in that case, element will be second argument
+ elem = el || elem;
+
+ // Inline style trumps all
+ return elem.style.display === "none" ||
+ elem.style.display === "" &&
+
+ // Otherwise, check computed style
+ // Support: Firefox <=43 - 45
+ // Disconnected elements can have computed display: none, so first confirm that elem is
+ // in the document.
+ isAttached( elem ) &&
+
+ jQuery.css( elem, "display" ) === "none";
+ };
+} );