mirror of
https://github.com/puppeteer/puppeteer
synced 2024-06-14 14:02:48 +00:00
30 lines
1.8 KiB
Markdown
30 lines
1.8 KiB
Markdown
|
---
|
||
|
|
sidebar_label: Accessibility
|
||
|
|
---
|
||
|
|
|
||
|
|
# Accessibility class
|
||
|
|
|
||
|
|
The Accessibility class provides methods for inspecting Chromium's accessibility tree. The accessibility tree is used by assistive technology such as [screen readers](https://en.wikipedia.org/wiki/Screen_reader) or [switches](https://en.wikipedia.org/wiki/Switch_access).
|
||
|
|
|
||
|
|
**Signature:**
|
||
|
|
|
||
|
|
```typescript
|
||
|
|
export declare class Accessibility
|
||
|
|
```
|
||
|
|
|
||
|
|
## Remarks
|
||
|
|
|
||
|
|
Accessibility is a very platform-specific thing. On different platforms, there are different screen readers that might have wildly different output.
|
||
|
|
|
||
|
|
Blink - Chrome's rendering engine - has a concept of "accessibility tree", which is then translated into different platform-specific APIs. Accessibility namespace gives users access to the Blink Accessibility Tree.
|
||
|
|
|
||
|
|
Most of the accessibility tree gets filtered out when converting from Blink AX Tree to Platform-specific AX-Tree or by assistive technologies themselves. By default, Puppeteer tries to approximate this filtering, exposing only the "interesting" nodes of the tree.
|
||
|
|
|
||
|
|
The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the `Accessibility` class.
|
||
|
|
|
||
|
|
## Methods
|
||
|
|
|
||
|
|
| Method | Modifiers | Description |
|
||
|
|
| ---------------------------------------------------------- | --------- | -------------------------------------------------------------------------------------------------------------------------- |
|
||
|
|
| [snapshot(options)](./puppeteer.accessibility.snapshot.md) | | Captures the current state of the accessibility tree. The returned object represents the root accessible node of the page. |
|