锚点链接以及hash属性_html/css_WEB-ITnose
相信大家挺经常见过这样一个效果。有一个很长很长的页面，分成好几部分，目录中一点击，就能定位到页面某个位置。
例如：有这样一个目录，例如你点击一下“HTML”，就会直接跳转到“HTML”的页面位置
这就是锚点链接（也叫书签链接），常常用于那些内容庞大繁琐的网页，通过点击命名锚点，不仅让我们能指向文档，还能指向页面里的特定段落，更能当作"精准链接"的便利工具。
在长页面中，用锚点定位本页面的某个位置，那用锚点链接就可以了。用法很简单，代码demo如下：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Document</title></head><body><a href="#5F">点击我，会锚点定位到某个地方</a></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br> <a name="5F">某个地方哈哈哈哈</href></body></html>
接下来，要讲的hash属性的锚点链接，实用性蛮高的。
在一次建站的过程中，遇到我遇到了这样一个问题，
在首页的导航中，我准备点击about下拉菜单的joinus,但是跳到about页面后的tab还是已经停留在news的版块，并不是joinus的版块。如图所示：
面对这种情况，我采用的是hash属性锚点链接，思路是这样的，先在index.html的导航四个链接中，先设置hash值，然后等到跳转到about.html的时候，再用var tab_hash=window.location.hash,去获取后面的hash值，才进行逻辑判断。
简单点说：其实还是跟普通的跳转一样，只不过在跳转的url后面加多了一个信息，让页面跳转后，再把信息拿下来使用。
一个小小实用性的属性，分享给大家，顺祝码祺！
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