背景
首个版本
修改意见
鉴于单个 H 标签设置比较贫苦纠结,而且有主题用户反应,干脆改成能够分级的啦
代码
var count_ti = count_in = count_ar = count_sc = count_hr = count_e = 1;
var offset = new Array;
$('.article-content h3').each(function () { //each猎取h3内容
$('#article-index').html($('#article-index').html() + '<li id="ti' + (count_ti++) +
'"><a onclick="$(\'body\').animate({ scrollTop: $(\'#in' + (count_hr++) +
'\').offset().top - 100 }, 500);"><i class="czs-circle-l"></i> ' + $(this).eq(0).html() +
'</a></li>');
$(this).eq(0).attr('id', 'in' + (count_in++)); //h3增加id
offset[0] = 0;
offset[count_ar++] = $(this).eq(0).offset().top; //h3位置存入数组
count_e++
});
if (count_e !== 1) { //若存在h3标签
$(window).scroll(function () { //滑动窗口时
var scroH = $(this).scrollTop() + 130;
var navH = offset[count_sc]; //从1最先猎取当前h3位置
var navH_prev = offset[count_sc - 1]; //猎取上一个h3位置(以备回滑)
if (scroH >= navH) { //滑过当前h3位置
$('#ti' + (count_sc - 1)).attr('class', '');
$('#ti' + count_sc).attr('class', 'active');
count_sc++; //调至下一个h3位置
}
if (scroH <= navH_prev) { //滑回上一个h3位置,调至上一个h3位置
$('#ti' + (count_sc - 2)).attr('class', 'active');
count_sc--;
$('#ti' + count_sc).attr('class', '');
}
});
} else {
$('.index-div').css('display', 'none')
}
↑ JavaScript 代码
讲明
$(“:header”)
能够猎取题目标签(Hx)
prop(“tagName”).replace(‘H’, ”)
能够猎取到标签级别