Function restoreSelection

notes.js:403–409

()

        
        // 恢复选区的函数
        function restoreSelection() {
            if (savedRange) {
                const selection = window.getSelection();
                selection.removeAllRanges();
                selection.addRange(savedRange);
            }
        }
        
        // 为工具栏添加mousedown事件监听器
        bar.addEventListener('mousedown', (e) => {