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docs: touch events guide improvements (#34903)
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yury-s authored Feb 24, 2025
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2 changes: 1 addition & 1 deletion docs/src/api/class-locator.md
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## async method: Locator.tap
* since: v1.14

Perform a tap gesture on the element matching the locator.
Perform a tap gesture on the element matching the locator. For examples of emulating other gestures by manually dispatching touch events, see the [emulating legacy touch events](../touch-events.md) page.

**Details**

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2 changes: 2 additions & 0 deletions docs/src/api/class-touchscreen.md
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The Touchscreen class operates in main-frame CSS pixels relative to the top-left corner of the viewport. Methods on the
touchscreen can only be used in browser contexts that have been initialized with `hasTouch` set to true.

This class is limited to emulating tap gestures. For examples of other gestures simulated by manually dispatching touch events, see the [emulating legacy touch events](../touch-events.md) page.

## async method: Touchscreen.tap
* since: v1.8

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14 changes: 4 additions & 10 deletions docs/src/touch-events.md
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---
id: touch-events
title: "Emulating touch events"
title: "Emulating legacy touch events"
---

## Introduction

Mobile web sites may listen to [touch events](https://developer.mozilla.org/en-US/docs/Web/API/Touch_events) and react to user touch gestures such as swipe, pinch, tap etc. To test this functionality you can manually generate [TouchEvent]s in the page context using [`method: Locator.evaluate`].
Web applications that handle [touch events](https://developer.mozilla.org/en-US/docs/Web/API/Touch_events) to respond to gestures like swipe, pinch, and tap can be tested by manually dispatching [TouchEvent](https://developer.mozilla.org/en-US/docs/Web/API/TouchEvent/TouchEvent)s to the page. The examples below demonstrate how to use [`method: Locator.dispatchEvent`] and pass [Touch](https://developer.mozilla.org/en-US/docs/Web/API/Touch) points as arguments.

If your web application relies on [pointer events](https://developer.mozilla.org/en-US/docs/Web/API/Pointer_events) instead of touch events, you can use [`method: Locator.click`] and raw [`Mouse`] events to simulate a single-finger touch, and this will trigger all the same pointer events.

### Dispatching TouchEvent

You can dispatch touch events to the page using [`method: Locator.dispatchEvent`]. [Touch](https://developer.mozilla.org/en-US/docs/Web/API/Touch) points can be passed as arguments, see examples below.

#### Emulating pan gesture
### Emulating pan gesture

In the example below, we emulate pan gesture that is expected to move the map. The app under test only uses `clientX/clientY` coordinates of the touch point, so we initialize just that. In a more complex scenario you may need to also set `pageX/pageY/screenX/screenY`, if your app needs them.

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});
```
#### Emulating pinch gesture
### Emulating pinch gesture
In the example below, we emulate pinch gesture, i.e. two touch points moving closer to each other. It is expected to zoom out the map. The app under test only uses `clientX/clientY` coordinates of touch points, so we initialize just that. In a more complex scenario you may need to also set `pageX/pageY/screenX/screenY`, if your app needs them.
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6 changes: 5 additions & 1 deletion packages/playwright-client/types/types.d.ts
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}): Promise<void>;

/**
* Perform a tap gesture on the element matching the locator.
* Perform a tap gesture on the element matching the locator. For examples of emulating other gestures by manually
* dispatching touch events, see the [emulating legacy touch events](https://playwright.dev/docs/touch-events) page.
*
* **Details**
*
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/**
* The Touchscreen class operates in main-frame CSS pixels relative to the top-left corner of the viewport. Methods on
* the touchscreen can only be used in browser contexts that have been initialized with `hasTouch` set to true.
*
* This class is limited to emulating tap gestures. For examples of other gestures simulated by manually dispatching
* touch events, see the [emulating legacy touch events](https://playwright.dev/docs/touch-events) page.
*/
export interface Touchscreen {
/**
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6 changes: 5 additions & 1 deletion packages/playwright-core/types/types.d.ts
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Expand Up @@ -14426,7 +14426,8 @@ export interface Locator {
}): Promise<void>;

/**
* Perform a tap gesture on the element matching the locator.
* Perform a tap gesture on the element matching the locator. For examples of emulating other gestures by manually
* dispatching touch events, see the [emulating legacy touch events](https://playwright.dev/docs/touch-events) page.
*
* **Details**
*
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/**
* The Touchscreen class operates in main-frame CSS pixels relative to the top-left corner of the viewport. Methods on
* the touchscreen can only be used in browser contexts that have been initialized with `hasTouch` set to true.
*
* This class is limited to emulating tap gestures. For examples of other gestures simulated by manually dispatching
* touch events, see the [emulating legacy touch events](https://playwright.dev/docs/touch-events) page.
*/
export interface Touchscreen {
/**
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