---
url: https://sugarat.top/bigWeb/performance/dnsPre.md
---

# DNS 预解析

DNS预解析是浏览器试图在用户访问链接之前解析域名

## 如何启用?

**X-DNS-Prefetch-Control**:`on`|`off`

```html
<meta http-equiv="x-dns-prefetch-control" content="off">
```

## 使用示例

```html
<!-- 打开DNS预解析 -->
<meta http-equiv="x-dns-prefetch-control" content="no">
<!-- 强制查询特定主机名 -->
<link rel="dns-prefetch" href="//sugarat.top">
```