请问老师，我的这个前端大标题怎么居中，而且怎么去掉大标题的边框

来源：2-4 编程练习

慕虎1507818

2021-01-27 20:43:28

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>模版字符串</title>
</head>

<body>
    <script type="text/javascript">
    const tmpl = function() {
        return {
            title: "前端",
            data: [{
                title: '布局基础',
                date: ["html", "css"]
            }, {
                title: '网页特效',
                date: ["javascript", "jquery"]
            }, {
                title: '框架',
                date: ["bootstrap", "vue"]
            }]
        }
    }
    // 补充代码
    const {title , data: listData} = tmpl();
    let arr = [];
    arr.push(title);
    listData.forEach(function({ title , date:[a,b] }){
        arr.push(
            `<tr><td>${title}</td><td>${a}</td><td>${b}</td></tr>`
            );
    });
    let table = document.createElement('table');
    table.innerHTML = arr.join('');
    document.body.appendChild(table);
    table.border = '1px';
    </script>
</body>
</html>