How to use Sizzle.attr method in Cypress

1/*!2Copyright (c) 2011, 2012 Julien Wajsberg <felash@gmail.com>3All rights reserved.4Official repository: https://github.com/julienw/jquery-trap-input5License is there: https://github.com/julienw/jquery-trap-input/blob/master/LICENSE6This is version 1.2.0.7*/8(function( $, undefined ){9/*10(this comment is after the first line of code so that uglifyjs removes it)11Redistribution and use in source and binary forms, with or without12modification, are permitted without condition.13Although that's not an obligation, I would appreciate that you provide a14link to the official repository.15THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS16IS" AND ANY EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED.17*/18/*jshint boss: true, bitwise: true, curly: true, expr: true, newcap: true, noarg: true, nonew: true, latedef: true, regexdash: true */19    var DATA_ISTRAPPING_KEY = "trap.isTrapping";20    function onkeypress(e) {21        if (e.keyCode === 9) {22            var goReverse = !!(e.shiftKey);23            if (processTab(this, e.target, goReverse)) {24                e.preventDefault();25                e.stopPropagation();26            }27        }28    }29    // will return true if we could process the tab event30    // otherwise, return false31    function processTab(container, elt, goReverse) {32        var $focussable = getFocusableElementsInContainer(container),33            curElt = elt,34            index, nextIndex, prevIndex, lastIndex;35        do {36            index = $focussable.index(curElt);37            nextIndex = index + 1;38            prevIndex = index - 1;39            lastIndex = $focussable.length - 1;40            switch(index) {41                case -1:42                    return false; // that's strange, let the browser do its job43                case 0:44                    prevIndex = lastIndex;45                    break;46                case lastIndex:47                    nextIndex = 0;48                    break;49            }50            if (goReverse) {51                nextIndex = prevIndex;52            }53            curElt = $focussable.get(nextIndex);54            if (!curElt || curElt === elt) { return true; }55            try {56                curElt.focus();57            } catch(e) { // IE sometimes throws when an element is not visible58                return true;59            }60        } while ($focussable.length > 1 && elt === elt.ownerDocument.activeElement);61        return true;62    }63    function filterKeepSpeciallyFocusable() {64        return this.tabIndex > 0;65    }66    function filterKeepNormalElements() {67        return !this.tabIndex; // true if no tabIndex or tabIndex == 068    }69    function sortFocusable(a, b) {70        return (a.t - b.t) || (a.i - b.i);71    }72    function getFocusableElementsInContainer(container) {73        var $container = $(container);74        var result = [],75            cnt = 0;76        fixIndexSelector.enable && fixIndexSelector.enable();77        // leaving away command and details for now78        $container.find("a[href], link[href], [draggable=true], [contenteditable=true], :input:enabled, [tabindex=0]")79            .filter(":visible")80            .filter(filterKeepNormalElements)81            .each(function(i, val) {82                result.push({83                    v: val, // value84                    t: 0, // tabIndex85                    i: cnt++ // index for stable sort86                });87            });88        $container89            .find("[tabindex]")90            .filter(":visible")91            .filter(filterKeepSpeciallyFocusable)92            .each(function(i, val) {93                result.push({94                    v: val, // value95                    t: val.tabIndex, // tabIndex96                    i: cnt++ // index97                });98            });99        fixIndexSelector.disable && fixIndexSelector.disable();100        result = $.map(result.sort(sortFocusable), // needs stable sort101            function(val) {102                return val.v;103            }104        );105        return $(result);106    }107    function trap() {108        this.keydown(onkeypress);109        this.data(DATA_ISTRAPPING_KEY, true);110        return this;111    }112    function untrap() {113        this.unbind('keydown', onkeypress);114        this.removeData(DATA_ISTRAPPING_KEY);115        return this;116    }117    function isTrapping() {118        return !!this.data(DATA_ISTRAPPING_KEY);119    }120    $.fn.extend({121        trap: trap,122        untrap: untrap,123        isTrapping: isTrapping124    });125    // jQuery 1.6.x tabindex attr hooks management126    // this triggers problems for tabindex attribute127    // selectors in IE7-128    // see https://github.com/julienw/jquery-trap-input/issues/3129   var fixIndexSelector = {};130   if ($.find.find && $.find.attr !== $.attr) {131        // jQuery uses Sizzle (this is jQuery >= 1.3)132        // sizzle uses its own attribute handling (in jq 1.6.x and below)133       (function() {134            var tabindexKey = "tabindex";135            var sizzleAttrHandle = $.expr.attrHandle;136            // this function comes directly from jQuery 1.7.2 (propHooks.tabIndex.get)137            // we have to put it here if we want to support jQuery < 1.6 which138            // doesn't have an attrHooks object to reference.139            function getTabindexAttr(elem) {140                // elem.tabIndex doesn't always return the correct value when it hasn't been explicitly set141                // http://fluidproject.org/blog/2008/01/09/getting-setting-and-removing-tabindex-values-with-javascript/142                var attributeNode = elem.getAttributeNode(tabindexKey);143                return attributeNode && attributeNode.specified ?144                    parseInt( attributeNode.value, 10 ) :145                    undefined;146            }147            function fixSizzleAttrHook() {148                // in jQ <= 1.6.x, we add to Sizzle the attrHook from jQuery's attr method149                sizzleAttrHandle[tabindexKey] = sizzleAttrHandle.tabIndex = getTabindexAttr;150            }151            function unfixSizzleAttrHook() {152                delete sizzleAttrHandle[tabindexKey];153                delete sizzleAttrHandle.tabIndex;154            }155            fixIndexSelector = {156                enable: fixSizzleAttrHook,157                disable: unfixSizzleAttrHook158            };159        })();160    }...

...14	// Set it again for good measure15	el.setAttribute( "checked", "checked" );16	el.setAttribute( "id", "id" );17	el.setAttribute( "value", "on" );18	strictEqual( Sizzle.attr( el, "nonexistent" ), null, "nonexistent" );19	strictEqual( Sizzle.attr( el, "id" ), "id", "existent" );20	strictEqual( Sizzle.attr( el, "value" ), "on", "value" );21	strictEqual( Sizzle.attr( el, "checked" ), "checked", "boolean" );22	strictEqual( Sizzle.attr( el, "href" ), null, "interpolation risk" );23	strictEqual( Sizzle.attr( el, "constructor" ), null,24		"Object.prototype property \"constructor\" (negative)" );25	strictEqual( Sizzle.attr( el, "watch" ), null,26		"Gecko Object.prototype property \"watch\" (negative)" );27	el.setAttribute( "constructor", "foo" );28	el.setAttribute( "watch", "bar" );29	strictEqual( Sizzle.attr( el, "constructor" ), "foo",30		"Object.prototype property \"constructor\"" );31	strictEqual( Sizzle.attr( el, "watch" ), "bar",32		"Gecko Object.prototype property \"watch\"" );33}34test("Sizzle.attr (HTML)", function() {35	testAttr();36});37test("Sizzle.attr (XML)", function() {38	testAttr( jQuery.parseXML("<root/>") );39});40test("Sizzle.contains", function() {41	expect( 16 );42	var container = document.getElementById("nonnodes"),43		element = container.firstChild,44		text = element.nextSibling,45		nonContained = container.nextSibling,...