Function morphAttrs

plugins/Sidebar/media/all.js:1326–1360

* Loop over all of the attributes on the target node and make sure the * original DOM node has the same attributes. If an attribute * found on the original node is not on the new node then remove it from * the original node * @param {HTMLElement} fromNode * @param {HTMLElement} toNode

(fromNode, toNode)

 * @param  {HTMLElement} toNode
 */
function morphAttrs(fromNode, toNode) {
    var attrs = toNode.attributes;
    var i;
    var attr;
    var attrName;
    var attrValue;
    var foundAttrs = {};

    for (i=attrs.length-1; i>=0; i--) {
        attr = attrs[i];
        if (attr.specified !== false) {
            attrName = attr.name;
            attrValue = attr.value;
            foundAttrs[attrName] = true;

            if (fromNode.getAttribute(attrName) !== attrValue) {
                fromNode.setAttribute(attrName, attrValue);
            }
        }
    }

    // Delete any extra attributes found on the original DOM element that weren't
    // found on the target element.
    attrs = fromNode.attributes;

    for (i=attrs.length-1; i>=0; i--) {
        attr = attrs[i];
        if (attr.specified !== false) {
            attrName = attr.name;
            if (!foundAttrs.hasOwnProperty(attrName)) {
                fromNode.removeAttribute(attrName);
            }
        }
    }
}

/**
 * Copies the children of one DOM element to another DOM element