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  <pre class="prettyprint lang-js"><span id='Ext-dom-AbstractQuery'>/**
</span> * @class Ext.dom.AbstractQuery
 * @private
 */
Ext.define('Ext.dom.AbstractQuery', {
<span id='Ext-dom-AbstractQuery-method-select'>    /**
</span>     * Selects a group of elements.
     * @param {String} selector The selector/xpath query (can be a comma separated list of selectors)
     * @param {HTMLElement/String} [root] The start of the query (defaults to document).
     * @return {HTMLElement[]} An Array of DOM elements which match the selector. If there are
     * no matches, and empty Array is returned.
     */
    select: function(q, root) {
        var results = [],
            nodes,
            i,
            j,
            qlen,
            nlen;

        root = root || document;

        if (typeof root == 'string') {
            root = document.getElementById(root);
        }

        q = q.split(&quot;,&quot;);

        for (i = 0,qlen = q.length; i &lt; qlen; i++) {
            if (typeof q[i] == 'string') {
                
                //support for node attribute selection
                if (typeof q[i][0] == '@') {
                    nodes = root.getAttributeNode(q[i].substring(1));
                    results.push(nodes);
                } else {
                    nodes = root.querySelectorAll(q[i]);

                    for (j = 0,nlen = nodes.length; j &lt; nlen; j++) {
                        results.push(nodes[j]);
                    }
                }
            }
        }

        return results;
    },

<span id='Ext-dom-AbstractQuery-method-selectNode'>    /**
</span>     * Selects a single element.
     * @param {String} selector The selector/xpath query
     * @param {HTMLElement/String} [root] The start of the query (defaults to document).
     * @return {HTMLElement} The DOM element which matched the selector.
     */
    selectNode: function(q, root) {
        return this.select(q, root)[0];
    },

<span id='Ext-dom-AbstractQuery-method-is'>    /**
</span>     * Returns true if the passed element(s) match the passed simple selector (e.g. div.some-class or span:first-child)
     * @param {String/HTMLElement/Array} el An element id, element or array of elements
     * @param {String} selector The simple selector to test
     * @return {Boolean}
     */
    is: function(el, q) {
        if (typeof el == &quot;string&quot;) {
            el = document.getElementById(el);
        }
        return this.select(q).indexOf(el) !== -1;
    }

});
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