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507 lines
15 KiB
Markdown
507 lines
15 KiB
Markdown
---
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id: navigations
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title: "Navigations"
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---
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Playwright can navigate to URLs and handle navigations caused by page interactions. This guide covers common scenarios
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to wait for page navigations and loading to complete.
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<!-- TOC -->
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## Navigation lifecycle
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Playwright splits the process of showing a new document in a page into **navigation** and **loading**.
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**Navigation starts** by changing the page URL or by interacting with the page (e.g., clicking a link).
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The navigation intent may be canceled, for example, on hitting an unresolved DNS address or transformed into a file download.
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**Navigation is committed** when the response headers have been parsed and session history is updated. Only after the
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navigation succeeds (is committed), the page starts **loading** the document.
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**Loading** covers getting the remaining response body over the network, parsing, executing the scripts and firing load
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events:
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- [`method: Page.url`] is set to the new url
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- document content is loaded over network and parsed
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- [`event: Page.DOMContentLoaded`] event is fired
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- page executes some scripts and loads resources like stylesheets and images
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- [`event: Page.load`] event is fired
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- page executes dynamically loaded scripts
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- `networkidle` is fired when no new network requests are made for 500 ms
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## Scenarios initiated by browser UI
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Navigations can be initiated by changing the URL bar, reloading the page or going back or forward in session history.
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### Auto-wait
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Navigating to a URL auto-waits for the page to fire the `load` event. If the page does a client-side redirect before
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`load`, [`method: Page.goto`] will auto-wait for the redirected page to fire the `load` event.
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```js
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// Navigate the page
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await page.goto('https://example.com');
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```
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```java
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// Navigate the page
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page.navigate("https://example.com");
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```
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```python async
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# Navigate the page
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await page.goto("https://example.com")
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```
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```python sync
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# Navigate the page
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page.goto("https://example.com")
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```
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```csharp
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// Navigate the page
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await page.GotoAsync("https://example.com");
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```
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### Custom wait
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Override the default behavior to wait until a specific event, like `networkidle`.
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```js
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// Navigate and wait until network is idle
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await page.goto('https://example.com', { waitUntil: 'networkidle' });
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```
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```java
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// Navigate and wait until network is idle
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page.navigate("https://example.com", new Page.NavigateOptions()
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.setWaitUntil(WaitUntilState.NETWORKIDLE));
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```
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```python async
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# Navigate and wait until network is idle
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await page.goto("https://example.com", wait_until="networkidle")
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```
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```python sync
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# Navigate and wait until network is idle
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page.goto("https://example.com", wait_until="networkidle")
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```
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```csharp
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// Navigate and wait until network is idle
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await page.GotoAsync("https://example.com", new PageGotoOptions { WaitUntil = WaitUntilState.NetworkIdle });
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```
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### Wait for element
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In lazy-loaded pages, it can be useful to wait until an element is visible with [`method: Locator.waitFor`].
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Alternatively, page interactions like [`method: Page.click`] auto-wait for elements.
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```js
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// Navigate and wait for element
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await page.goto('https://example.com');
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await page.locator('text=Example Domain').waitFor();
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// Navigate and click element
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// Click will auto-wait for the element
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await page.goto('https://example.com');
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await page.locator('text=Example Domain').click();
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```
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```java
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// Navigate and wait for element
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page.navigate("https://example.com");
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page.locator("text=Example Domain").waitFor();
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// Navigate and click element
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// Click will auto-wait for the element
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page.navigate("https://example.com");
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page.locator("text=Example Domain").click();
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```
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```python async
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# Navigate and wait for element
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await page.goto("https://example.com")
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await page.locator("text=example domain").wait_for()
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# Navigate and click element
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# Click will auto-wait for the element
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await page.goto("https://example.com")
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await page.locator("text=example domain").click()
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```
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```python sync
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# Navigate and wait for element
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page.goto("https://example.com")
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page.locator("text=example domain").wait_for()
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# Navigate and click element
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# Click will auto-wait for the element
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page.goto("https://example.com")
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page.locator("text=example domain").click()
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```
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```csharp
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// Navigate and wait for element
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await page.GotoAsync("https://example.com");
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await page.Locator("text=Example Domain").WaitForAsync();
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// Navigate and click element
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// Click will auto-wait for the element
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await page.GotoAsync("https://example.com");
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await page.Locator("text=Example Domain").ClickAsync();
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```
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### API reference
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- [`method: Page.goto`]
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- [`method: Page.reload`]
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- [`method: Page.goBack`]
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- [`method: Page.goForward`]
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## Scenarios initiated by page interaction
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In the scenarios below, [`method: Locator.click`] initiates a navigation and then waits for the navigation to complete.
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### Auto-wait
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By default, [`method: Locator.click`] will wait for the navigation step to complete. This can be combined with a page interaction on
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the navigated page which would auto-wait for an element.
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```js
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// Click will auto-wait for navigation to complete
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await page.locator('text=Login').click();
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// Fill will auto-wait for element on navigated page
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await page.locator('#username').fill('John Doe');
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```
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```java
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// Click will auto-wait for navigation to complete
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page.locator("text=Login").click();
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// Fill will auto-wait for element on navigated page
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page.locator("#username").fill("John Doe");
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```
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```python async
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# Click will auto-wait for navigation to complete
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await page.locator("text=Login").click()
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# Fill will auto-wait for element on navigated page
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await page.locator("#username").fill("John Doe")
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```
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```python sync
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# Click will auto-wait for navigation to complete
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page.locator("text=Login").click()
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# Fill will auto-wait for element on navigated page
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page.locator("#username").fill("John Doe")
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```
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```csharp
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// Click will auto-wait for navigation to complete
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await page.Locator("text=Login").ClickAsync();
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// Fill will auto-wait for element on navigated page
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await page.Locator("#username").FillAsync("John Doe");
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```
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### Custom wait
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`locator.click` can be combined with [`method: Page.waitForLoadState`] to wait for a loading event.
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```js
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await page.locator('button').click(); // Click triggers navigation
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await page.waitForLoadState('networkidle'); // This resolves after 'networkidle'
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```
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```java
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page.locator("button").click(); // Click triggers navigation
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page.waitForLoadState(LoadState.NETWORKIDLE); // This resolves after "networkidle"
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```
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```python async
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await page.locator("button").click(); # Click triggers navigation
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await page.wait_for_load_state("networkidle"); # This waits for the "networkidle"
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```
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```python sync
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page.locator("button").click(); # Click triggers navigation
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page.wait_for_load_state("networkidle"); # This waits for the "networkidle"
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```
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```csharp
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await page.Locator("button").ClickAsync(); // Click triggers navigation
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await page.WaitForLoadStateAsync(LoadState.NetworkIdle); // This resolves after "networkidle"
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```
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### Wait for element
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In lazy-loaded pages, it can be useful to wait until an element is visible with [`method: Locator.waitFor`].
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Alternatively, page interactions like [`method: Locator.click`] auto-wait for elements.
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```js
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// Click will auto-wait for the element and trigger navigation
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await page.locator('text=Login').click();
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// Wait for the element
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await page.locator('#username').waitFor();
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// Click triggers navigation
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await page.locator('text=Login').click();
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// Fill will auto-wait for element
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await page.locator('#username').fill('John Doe');
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```
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```java
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// Click will auto-wait for the element and trigger navigation
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page.locator("text=Login").click();
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// Wait for the element
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page.locator("#username").waitFor();
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// Click triggers navigation
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page.locator("text=Login").click();
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// Fill will auto-wait for element
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page.locator("#username").fill("John Doe");
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```
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```python async
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# Click will auto-wait for the element and trigger navigation
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await page.locator("text=Login").click()
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# Wait for the element
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await page.locator("#username").wait_for()
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# Click triggers navigation
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await page.locator("text=Login").click()
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# Fill will auto-wait for element
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await page.locator("#username").fill("John Doe")
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```
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```python sync
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# Click triggers navigation
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page.locator("text=Login").click()
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# Click will auto-wait for the element
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page.locator("#username").wait_for()
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# Click triggers navigation
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page.locator("text=Login").click()
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# Fill will auto-wait for element
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page.locator("#username").fill("John Doe")
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```
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```csharp
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// Click will auto-wait for the element and trigger navigation
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await page.Locator("text=Login").ClickAsync();
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// Wait for the element
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await page.Locator("#username").WaitForAsync();
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// Click triggers navigation
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await page.Locator("text=Login").ClickAsync();
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// Fill will auto-wait for element
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await page.Locator("#username").FillAsync("John Doe");
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```
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### Asynchronous navigation
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Clicking an element could trigger asynchronous processing before initiating the navigation. In these cases, it is
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recommended to explicitly call [`method: Page.waitForNavigation`]. For example:
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* Navigation is triggered from a `setTimeout`
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* Page waits for network requests before navigation
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```js
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// Note that Promise.all prevents a race condition
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// between clicking and waiting for a navigation.
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await Promise.all([
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// Waits for the next navigation.
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// It is important to call waitForNavigation before click to set up waiting.
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page.waitForNavigation(),
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// Triggers a navigation after a timeout.
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page.locator('div.delayed-navigation').click(),
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]);
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```
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```java
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// Using waitForNavigation with a callback prevents a race condition
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// between clicking and waiting for a navigation.
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page.waitForNavigation(() -> { // Waits for the next navigation
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page.locator("div.delayed-navigation").click(); // Triggers a navigation after a timeout
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});
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```
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```python async
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# Waits for the next navigation. Using Python context manager
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# prevents a race condition between clicking and waiting for a navigation.
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async with page.expect_navigation():
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# Triggers a navigation after a timeout
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await page.locator("div.delayed-navigation").click()
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```
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```python sync
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# Waits for the next navigation. Using Python context manager
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# prevents a race condition between clicking and waiting for a navigation.
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with page.expect_navigation():
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# Triggers a navigation after a timeout
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page.locator("a").click()
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```
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```csharp
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// Using waitForNavigation with a callback prevents a race condition
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// between clicking and waiting for a navigation.
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await page.RunAndWaitForNavigationAsync(async () =>
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{
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// Triggers a navigation after a timeout
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await page.Locator("div.delayed-navigation").ClickAsync();
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});
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```
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### Multiple navigations
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Clicking an element could trigger multiple navigations. In these cases, it is recommended to explicitly
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[`method: Page.waitForNavigation`] to a specific url. For example:
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* Client-side redirects issued after the `load` event
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* Multiple pushes to history state
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```js
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// Note that Promise.all prevents a race condition
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// between clicking and waiting for a navigation.
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await Promise.all([
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// It is important to call waitForNavigation before click to set up waiting.
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page.waitForNavigation({ url: '**/login' }),
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// Triggers a navigation with a script redirect.
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page.locator('text=Click me').click(),
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]);
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```
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```java
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// Running action in the callback of waitForNavigation prevents a race
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// condition between clicking and waiting for a navigation.
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page.waitForNavigation(new Page.WaitForNavigationOptions().setUrl("**/login"), () -> {
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page.locator("a").click(); // Triggers a navigation with a script redirect
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});
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```
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```python async
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# Using Python context manager prevents a race condition
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# between clicking and waiting for a navigation.
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async with page.expect_navigation(url="**/login"):
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# Triggers a navigation with a script redirect
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await page.locator("a").click()
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```
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```python sync
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# Using Python context manager prevents a race condition
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# between clicking and waiting for a navigation.
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with page.expect_navigation(url="**/login"):
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# Triggers a navigation with a script redirect
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page.locator("a").click()
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```
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```csharp
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// Running action in the callback of waitForNavigation prevents a race
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// condition between clicking and waiting for a navigation.
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await page.RunAndWaitForNavigationAsync(async () =>
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{
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// Triggers a navigation with a script redirect.
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await page.Locator("a").ClickAsync();
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}, new()
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{
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UrlString = "**/login"
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});
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```
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### Loading a popup
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When popup is opened, explicitly calling [`method: Page.waitForLoadState`] ensures that popup is loaded to the desired
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state.
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```js
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// Note that Promise.all prevents a race condition
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// between clicking and waiting for the popup.
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const [ popup ] = await Promise.all([
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// It is important to call waitForEvent before click to set up waiting.
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page.waitForEvent('popup'),
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// Opens popup.
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page.locator('a[target="_blank"]').click(),
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]);
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await popup.waitForLoadState('load');
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```
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```java
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Page popup = page.waitForPopup(() -> {
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page.locator("a[target='_blank']").click(); // Opens popup
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});
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popup.waitForLoadState(LoadState.LOAD);
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```
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```python async
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async with page.expect_popup() as popup_info:
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await page.locator('a[target="_blank"]').click() # Opens popup
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popup = await popup_info.value
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await popup.wait_for_load_state("load")
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```
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```python sync
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with page.expect_popup() as popup_info:
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page.locator('a[target="_blank"]').click() # Opens popup
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popup = popup_info.value
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popup.wait_for_load_state("load")
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```
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```csharp
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var popup = await page.RunAndWaitForPopupAsync(async () =>
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{
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await page.Locator("a[target='_blank']").ClickAsync(); // Opens popup
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});
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popup.WaitForLoadStateAsync(LoadState.Load);
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```
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### API reference
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- [`method: Locator.click`]
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- [`method: Page.waitForLoadState`]
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- [`method: Page.waitForNavigation`]
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- [`method: Page.waitForFunction`]
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## Advanced patterns
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For pages that have complicated loading patterns, [`method: Page.waitForFunction`] is a powerful and extensible approach
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to define a custom wait criteria.
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```js
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await page.goto('http://example.com');
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await page.waitForFunction(() => window.amILoadedYet());
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// Ready to take a screenshot, according to the page itself.
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await page.screenshot();
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```
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```java
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page.navigate("http://example.com");
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page.waitForFunction("() => window.amILoadedYet()");
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// Ready to take a screenshot, according to the page itself.
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page.screenshot();
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```
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```python async
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await page.goto("http://example.com")
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await page.wait_for_function("() => window.amILoadedYet()")
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# Ready to take a screenshot, according to the page itself.
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await page.screenshot()
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```
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```python sync
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page.goto("http://example.com")
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page.wait_for_function("() => window.amILoadedYet()")
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# Ready to take a screenshot, according to the page itself.
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page.screenshot()
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```
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```csharp
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await page.GotoAsync("http://example.com");
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await page.WaitForFunctionAsync("() => window.amILoadedYet()");
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// Ready to take a screenshot, according to the page itself.
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await page.ScreenshotAsync();
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```
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### API reference
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- [`method: Page.waitForFunction`]
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