MaterialMenu.prototype.init = function()

in website/css/mdl/material.js [1233:1301]
61 lines of code
13 McCabe index (conditional complexity)

MaterialMenu.prototype.init = function () {
    if (this.element_) {
        // Create container for the menu.
        var container = document.createElement('div');
        container.classList.add(this.CssClasses_.CONTAINER);
        this.element_.parentElement.insertBefore(container, this.element_);
        this.element_.parentElement.removeChild(this.element_);
        container.appendChild(this.element_);
        this.container_ = container;
        // Create outline for the menu (shadow and background).
        var outline = document.createElement('div');
        outline.classList.add(this.CssClasses_.OUTLINE);
        this.outline_ = outline;
        container.insertBefore(outline, this.element_);
        // Find the "for" element and bind events to it.
        var forElId = this.element_.getAttribute('for') || this.element_.getAttribute('data-for');
        var forEl = null;
        if (forElId) {
            forEl = document.getElementById(forElId);
            if (forEl) {
                this.forElement_ = forEl;
                forEl.addEventListener('click', this.handleForClick_.bind(this));
                forEl.addEventListener('keydown', this.handleForKeyboardEvent_.bind(this));
            }
        }
        var items = this.element_.querySelectorAll('.' + this.CssClasses_.ITEM);
        this.boundItemKeydown = this.handleItemKeyboardEvent_.bind(this);
        this.boundItemClick = this.handleItemClick_.bind(this);
        for (var i = 0; i < items.length; i++) {
            // Add a listener to each menu item.
            items[i].addEventListener('click', this.boundItemClick);
            // Add a tab index to each menu item.
            items[i].tabIndex = '-1';
            // Add a keyboard listener to each menu item.
            items[i].addEventListener('keydown', this.boundItemKeydown);
        }
        // Add ripple classes to each item, if the user has enabled ripples.
        if (this.element_.classList.contains(this.CssClasses_.RIPPLE_EFFECT)) {
            this.element_.classList.add(this.CssClasses_.RIPPLE_IGNORE_EVENTS);
            for (i = 0; i < items.length; i++) {
                var item = items[i];
                var rippleContainer = document.createElement('span');
                rippleContainer.classList.add(this.CssClasses_.ITEM_RIPPLE_CONTAINER);
                var ripple = document.createElement('span');
                ripple.classList.add(this.CssClasses_.RIPPLE);
                rippleContainer.appendChild(ripple);
                item.appendChild(rippleContainer);
                item.classList.add(this.CssClasses_.RIPPLE_EFFECT);
            }
        }
        // Copy alignment classes to the container, so the outline can use them.
        if (this.element_.classList.contains(this.CssClasses_.BOTTOM_LEFT)) {
            this.outline_.classList.add(this.CssClasses_.BOTTOM_LEFT);
        }
        if (this.element_.classList.contains(this.CssClasses_.BOTTOM_RIGHT)) {
            this.outline_.classList.add(this.CssClasses_.BOTTOM_RIGHT);
        }
        if (this.element_.classList.contains(this.CssClasses_.TOP_LEFT)) {
            this.outline_.classList.add(this.CssClasses_.TOP_LEFT);
        }
        if (this.element_.classList.contains(this.CssClasses_.TOP_RIGHT)) {
            this.outline_.classList.add(this.CssClasses_.TOP_RIGHT);
        }
        if (this.element_.classList.contains(this.CssClasses_.UNALIGNED)) {
            this.outline_.classList.add(this.CssClasses_.UNALIGNED);
        }
        container.classList.add(this.CssClasses_.IS_UPGRADED);
    }
};