File size: 13,025 Bytes
1e92f2d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 |
---
title: useSearchParams
description: API Reference for the useSearchParams hook.
---
`useSearchParams` is a **Client Component** hook that lets you read the current URL's **query string**.
`useSearchParams` returns a **read-only** version of the [`URLSearchParams`](https://developer.mozilla.org/docs/Web/API/URLSearchParams) interface.
```tsx filename="app/dashboard/search-bar.tsx" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// URL -> `/dashboard?search=my-project`
// `search` -> 'my-project'
return <>Search: {search}</>
}
```
```jsx filename="app/dashboard/search-bar.js" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// URL -> `/dashboard?search=my-project`
// `search` -> 'my-project'
return <>Search: {search}</>
}
```
## Parameters
```tsx
const searchParams = useSearchParams()
```
`useSearchParams` does not take any parameters.
## Returns
`useSearchParams` returns a **read-only** version of the [`URLSearchParams`](https://developer.mozilla.org/docs/Web/API/URLSearchParams) interface, which includes utility methods for reading the URL's query string:
- [`URLSearchParams.get()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/get): Returns the first value associated with the search parameter. For example:
| URL | `searchParams.get("a")` |
| -------------------- | --------------------------------------------------------------------------------------------------------------- |
| `/dashboard?a=1` | `'1'` |
| `/dashboard?a=` | `''` |
| `/dashboard?b=3` | `null` |
| `/dashboard?a=1&a=2` | `'1'` _- use [`getAll()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/getAll) to get all values_ |
- [`URLSearchParams.has()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/has): Returns a boolean value indicating if the given parameter exists. For example:
| URL | `searchParams.has("a")` |
| ---------------- | ----------------------- |
| `/dashboard?a=1` | `true` |
| `/dashboard?b=3` | `false` |
- Learn more about other **read-only** methods of [`URLSearchParams`](https://developer.mozilla.org/docs/Web/API/URLSearchParams), including the [`getAll()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/getAll), [`keys()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/keys), [`values()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/values), [`entries()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/entries), [`forEach()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/forEach), and [`toString()`](https://developer.mozilla.org/docs/Web/API/URLSearchParams/toString).
> **Good to know**:
>
> - `useSearchParams` is a [Client Component](/docs/app/getting-started/server-and-client-components) hook and is **not supported** in [Server Components](/docs/app/getting-started/server-and-client-components) to prevent stale values during [partial rendering](/docs/app/getting-started/linking-and-navigating#client-side-transitions).
> - If you want to fetch data in a Server Component based on search params, it's often a better option to read the [`searchParams` prop](/docs/app/api-reference/file-conventions/page#searchparams-optional) of the corresponding Page. You can then pass it down by props to any component (Server or Client) within that Page.
> - If an application includes the `/pages` directory, `useSearchParams` will return `ReadonlyURLSearchParams | null`. The `null` value is for compatibility during migration since search params cannot be known during pre-rendering of a page that doesn't use `getServerSideProps`
## Behavior
### Static Rendering
If a route is [statically rendered](/docs/app/getting-started/partial-prerendering#static-rendering), calling `useSearchParams` will cause the Client Component tree up to the closest [`Suspense` boundary](/docs/app/api-reference/file-conventions/loading#examples) to be client-side rendered.
This allows a part of the route to be statically rendered while the dynamic part that uses `useSearchParams` is client-side rendered.
We recommend wrapping the Client Component that uses `useSearchParams` in a `<Suspense/>` boundary. This will allow any Client Components above it to be statically rendered and sent as part of initial HTML. [Example](/docs/app/api-reference/functions/use-search-params#static-rendering).
For example:
```tsx filename="app/dashboard/search-bar.tsx" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// This will not be logged on the server when using static rendering
console.log(search)
return <>Search: {search}</>
}
```
```jsx filename="app/dashboard/search-bar.js" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// This will not be logged on the server when using static rendering
console.log(search)
return <>Search: {search}</>
}
```
```tsx filename="app/dashboard/page.tsx" switcher
import { Suspense } from 'react'
import SearchBar from './search-bar'
// This component passed as a fallback to the Suspense boundary
// will be rendered in place of the search bar in the initial HTML.
// When the value is available during React hydration the fallback
// will be replaced with the `<SearchBar>` component.
function SearchBarFallback() {
return <>placeholder</>
}
export default function Page() {
return (
<>
<nav>
<Suspense fallback={<SearchBarFallback />}>
<SearchBar />
</Suspense>
</nav>
<h1>Dashboard</h1>
</>
)
}
```
```jsx filename="app/dashboard/page.js" switcher
import { Suspense } from 'react'
import SearchBar from './search-bar'
// This component passed as a fallback to the Suspense boundary
// will be rendered in place of the search bar in the initial HTML.
// When the value is available during React hydration the fallback
// will be replaced with the `<SearchBar>` component.
function SearchBarFallback() {
return <>placeholder</>
}
export default function Page() {
return (
<>
<nav>
<Suspense fallback={<SearchBarFallback />}>
<SearchBar />
</Suspense>
</nav>
<h1>Dashboard</h1>
</>
)
}
```
> **Good to know**: In development, all pages are rendered on-demand, so `useSearchParams` doesn't suspend. However, pre-rendering a [static page](/docs/app/getting-started/partial-prerendering#static-rendering) that worked in development will fail the build if `useSearchParams` is used in a Client Component that isn’t directly or indirectly wrapped in a `Suspense` boundary.
### Dynamic Rendering
If a route is [dynamically rendered](/docs/app/getting-started/partial-prerendering#dynamic-rendering), `useSearchParams` will be available on the server during the initial server render of the Client Component.
For example:
```tsx filename="app/dashboard/search-bar.tsx" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// This will be logged on the server during the initial render
// and on the client on subsequent navigations.
console.log(search)
return <>Search: {search}</>
}
```
```jsx filename="app/dashboard/search-bar.js" switcher
'use client'
import { useSearchParams } from 'next/navigation'
export default function SearchBar() {
const searchParams = useSearchParams()
const search = searchParams.get('search')
// This will be logged on the server during the initial render
// and on the client on subsequent navigations.
console.log(search)
return <>Search: {search}</>
}
```
```tsx filename="app/dashboard/page.tsx" switcher
import SearchBar from './search-bar'
export const dynamic = 'force-dynamic'
export default function Page() {
return (
<>
<nav>
<SearchBar />
</nav>
<h1>Dashboard</h1>
</>
)
}
```
```jsx filename="app/dashboard/page.js" switcher
import SearchBar from './search-bar'
export const dynamic = 'force-dynamic'
export default function Page() {
return (
<>
<nav>
<SearchBar />
</nav>
<h1>Dashboard</h1>
</>
)
}
```
> **Good to know**: Setting the [`dynamic` route segment config option](/docs/app/api-reference/file-conventions/route-segment-config#dynamic) to `force-dynamic` can be used to force dynamic rendering.
### Server Components
#### Pages
To access search params in [Pages](/docs/app/api-reference/file-conventions/page) (Server Components), use the [`searchParams`](/docs/app/api-reference/file-conventions/page#searchparams-optional) prop.
#### Layouts
Unlike Pages, [Layouts](/docs/app/api-reference/file-conventions/layout) (Server Components) **do not** receive the `searchParams` prop. This is because a shared layout is [not re-rendered during navigation](/docs/app/getting-started/linking-and-navigating#client-side-transitions) which could lead to stale `searchParams` between navigations. View [detailed explanation](/docs/app/api-reference/file-conventions/layout#query-params).
Instead, use the Page [`searchParams`](/docs/app/api-reference/file-conventions/page) prop or the [`useSearchParams`](/docs/app/api-reference/functions/use-search-params) hook in a Client Component, which is re-rendered on the client with the latest `searchParams`.
## Examples
### Updating `searchParams`
You can use [`useRouter`](/docs/app/api-reference/functions/use-router) or [`Link`](/docs/app/api-reference/components/link) to set new `searchParams`. After a navigation is performed, the current [`page.js`](/docs/app/api-reference/file-conventions/page) will receive an updated [`searchParams` prop](/docs/app/api-reference/file-conventions/page#searchparams-optional).
```tsx filename="app/example-client-component.tsx" switcher
'use client'
export default function ExampleClientComponent() {
const router = useRouter()
const pathname = usePathname()
const searchParams = useSearchParams()
// Get a new searchParams string by merging the current
// searchParams with a provided key/value pair
const createQueryString = useCallback(
(name: string, value: string) => {
const params = new URLSearchParams(searchParams.toString())
params.set(name, value)
return params.toString()
},
[searchParams]
)
return (
<>
<p>Sort By</p>
{/* using useRouter */}
<button
onClick={() => {
// <pathname>?sort=asc
router.push(pathname + '?' + createQueryString('sort', 'asc'))
}}
>
ASC
</button>
{/* using <Link> */}
<Link
href={
// <pathname>?sort=desc
pathname + '?' + createQueryString('sort', 'desc')
}
>
DESC
</Link>
</>
)
}
```
```jsx filename="app/example-client-component.js" switcher
'use client'
export default function ExampleClientComponent() {
const router = useRouter()
const pathname = usePathname()
const searchParams = useSearchParams()
// Get a new searchParams string by merging the current
// searchParams with a provided key/value pair
const createQueryString = useCallback(
(name, value) => {
const params = new URLSearchParams(searchParams)
params.set(name, value)
return params.toString()
},
[searchParams]
)
return (
<>
<p>Sort By</p>
{/* using useRouter */}
<button
onClick={() => {
// <pathname>?sort=asc
router.push(pathname + '?' + createQueryString('sort', 'asc'))
}}
>
ASC
</button>
{/* using <Link> */}
<Link
href={
// <pathname>?sort=desc
pathname + '?' + createQueryString('sort', 'desc')
}
>
DESC
</Link>
</>
)
}
```
## Version History
| Version | Changes |
| --------- | ----------------------------- |
| `v13.0.0` | `useSearchParams` introduced. |
|