参考链接：

JS获取B站视频选集目录 Week6 - 知乎

代码

var x = document.getElementsByClassName("clickitem");
var i;
for (i = 0; i < x.length; i++) {
	var page_num = x[i].getElementsByClassName("page-num")[0].innerText;
	var part = x[i].getElementsByClassName("part")[0].innerText;
	var duration = x[i].getElementsByClassName("duration")[0].innerText;
	var line = page_num + ' ' + part + ' ' + duration;
    console.log(line);
}