# Source: https://github.com/jsx-eslint/eslint-plugin-react/blob/master/docs/rules/jsx-one-expression-per-line.md

# Require one JSX element per line (`react/jsx-one-expression-per-line`)

🔧 This rule is automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix).

<!-- end auto-generated rule header -->

This option limits every line in JSX to one expression each.

Note: The fixer will insert line breaks between any expression that are on the same line.

## Rule Details

Examples of **incorrect** code for this rule:

```jsx
<App><Hello /></App>

<App><Hello />
</App>

<App>
  <Hello>
  </Hello></App>

<App>
  <Hello /> World
</App>

<App>
  <Hello /> { 'World' }
</App>

<App>
  <Hello /> { this.world() }
</App>

<App>
  { 'Hello' }{ ' ' }{ 'World' }
</App>

<App
  foo
><Hello />
</App>

<App><Hello
  foo
/>
</App>

<App><Hello1 />
     <Hello2 />
     <Hello3 />
</App>
```

Examples of **correct** code for this rule:

```jsx
<App>
  <Hello />
</App>

<App>
  <Hello>
  </Hello>
</App>

<App>
  <Hello />
  World
</App>

<App>
  <Hello />
  { 'World' }
</App>

<App>
  <Hello />
  { this.world() }
</App>

<App>
  { 'Hello' }
  { ' ' }
  { 'World' }
</App>

<App
  foo
>
  <Hello />
</App>

<App>
  <Hello
    foo
  />
</App>

<App>
  <Hello1 />
  <Hello2 />
  <Hello3 />
</App>
```

## Rule Options

```js
...
"react/jsx-one-expression-per-line": [<enabled>, { "allow": "none"|"literal"|"single-child" }]
...
```

### `allow`

Defaults to `none`.

Examples of **correct** code for this rule, when configured as `"literal"`:

```jsx
<App>Hello</App>
```

Examples of **correct** code for this rule, when configured as `"single-child"`:

```jsx
<App>Hello</App>

<App>{"Hello"}</App>

<App><Hello /></App>
```

Examples of **correct** code for this rule, when configured as `"non-jsx"`:

```jsx
<App>Hello {someVariable}</App>

<App>Hello {<Hello />} there!</App>
```