Function createPopup

js/mui.popup.js:50–124

(html, callback)

    };

    var createPopup = function(html, callback) {
        var popupElement = document.createElement('div');
        popupElement.className = CLASS_POPUP;
        popupElement.innerHTML = html;
        var removePopupElement = function() {
            popupElement.parentNode && popupElement.parentNode.removeChild(popupElement);
            popupElement = null;
        };
        popupElement.addEventListener($.EVENT_MOVE, $.preventDefault);
        popupElement.addEventListener('webkitTransitionEnd', function(e) {
            if (popupElement && e.target === popupElement && popupElement.classList.contains(CLASS_POPUP_OUT)) {
                removePopupElement();
            }
        });
        popupElement.style.display = 'block';
        document.body.appendChild(popupElement);
        popupElement.offsetHeight;
        popupElement.classList.add(CLASS_POPUP_IN);

        if (!backdrop.classList.contains(CLASS_ACTIVE)) {
            backdrop.style.display = 'block';
            document.body.appendChild(backdrop);
            backdrop.offsetHeight;
            backdrop.classList.add(CLASS_ACTIVE);
        }
        var btns = $.qsa('.' + CLASS_POPUP_BUTTON, popupElement);
        var input = popupElement.querySelector('.' + CLASS_POPUP_INPUT + ' input');
        var popup = {
            element: popupElement,
            close: function(index, animate) {
                if (popupElement) {
                    var result = callback && callback({
                        index: index || 0,
                        value: input && input.value || ''
                    });
                    if (result === false) { //返回false则不关闭当前popup
                        return;
                    }
                    if (animate !== false) {
                        popupElement.classList.remove(CLASS_POPUP_IN);
                        popupElement.classList.add(CLASS_POPUP_OUT);
                    } else {
                        removePopupElement();
                    }
                    popupStack.pop();
                    //如果还有其他popup，则不remove backdrop
                    if (popupStack.length) {
                        popupStack[popupStack.length - 1]['show'](animate);
                    } else {
                        backdrop.classList.remove(CLASS_ACTIVE);
                    }
                }
            }
        };
        var handleEvent = function(e) {
            popup.close(btns.indexOf(e.target));
        };
        $(popupElement).on('tap', '.' + CLASS_POPUP_BUTTON, handleEvent);