yew/website/docs/concepts/basic-web-technologies/html.mdx

---
title: 'HTML with html!'
description: 'Its HTML but not quite!'
comment: 'Keep this file as short and simple as possible. Its purpose is to ease the reader into components in Yew instead of providing proper API docs'
---

import Tabs from '@theme/Tabs'
import TabItem from '@theme/TabItem'

You can write expressions resembling HTML with the `html!` macro. Behind the scenes, Yew turns
it into rust code representing the DOM to generate.

```rust
use yew::prelude::*;

let my_header: Html = html! {
    <img src="img_girl.jpg" alt="Girl in a jacket" width="500" height="600" />
};
```

Similar to format expressions, there is an easy way to embed values from the surrounding
context into the HTML by applying curly brackets:

```rust
use yew::prelude::*;

let header_text = "Hello world".to_string();
let header_html: Html = html! {
    <h1>{header_text}</h1>
};

let count: usize = 5;
let counter_html: Html = html! {
    <p>{"My age is: "}{count}</p>
};

let combined_html: Html = html! {
    <div>{header_html}{counter_html}</div>
};
```

One major rule comes with the use of `html!` - you can only return 1 wrapping node.
To render a list of multiple elements, `html!` allows fragments. Fragments are tags
without a name, that produce no HTML element by themselves.

<Tabs>
<TabItem value="Invalid" label="Invalid">

```rust , compile_fail
use yew::html;

// error: only one root HTML element allowed
html! {

    <div></div>
    <p></p>

};
```

</TabItem>
<TabItem value="Valid" label="Valid">

```rust
use yew::html;

// fixed: using HTML fragments
html! {
    <>
        <div></div>
        <p></p>
    </>
};
```

</TabItem>
</Tabs>

We will introduce Yew and HTML further in depth in [more HTML](concepts/html/introduction.mdx).