Function _getUndoList

static/wangEditor/js/wangEditor.js:800–805

(editor)

        return editor._redoList;
    }
    function _getUndoList(editor) {
        if (editor._undoList == null) {
            editor._undoList = [];
        }
        return editor._undoList;
    }

    // 数据处理
    function _handle(editor, data, type) {