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第70天 html的a标签属性rel='nofollow'有什么作用?
The text was updated successfully, but these errors were encountered:
告诉爬虫,别往下走了,防止爬虫跳出自己的站点。 爬虫默认遇见链接,会继续爬取链接的内容。
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nofollow有两种用法: 1.用于meta元标签: <meta name="robots" content="nofollow" /> 告诉爬虫该页面上所有链接都无需追踪。 2.用于a标签: <a href="login.aspx" rel="nofollow">登录</a> 告诉爬虫该页面无需追踪
<meta name="robots" content="nofollow" />
<a href="login.aspx" rel="nofollow">登录</a>
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第70天 html的a标签属性rel='nofollow'有什么作用?
The text was updated successfully, but these errors were encountered: