---
url: /docs/guide/usage/linter/rules/jsdoc/require-param-type.md
---

### What it does

Requires that each `@param` tag has a type value (within curly brackets).

### Why is this bad?

The type of a parameter should be documented.

### Examples

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

```javascript
/** @param foo */
function quux(foo) {}
```

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

```javascript
/** @param {SomeType} foo */
function quux(foo) {}
```

## Configuration

This rule accepts a configuration object with the following properties:

### defaultDestructuredRootType

type: `string`

default: `"object"`

The type string to set by default for destructured roots. Defaults to "object".

### setDefaultDestructuredRootType

type: `boolean`

default: `false`

Whether to set a default destructured root type. For example, you may wish to avoid manually having to set the type for a `@param` corresponding to a destructured root object as it is always going to be an object. Uses `defaultDestructuredRootType` for the type string. Defaults to `false`.

## How to use

## Version

This rule was added in v0.4.4.

## References