Class: Playwright::Accessibility

Inherits:
PlaywrightApi show all
Defined in:
lib/playwright_api/accessibility.rb

Overview

The Accessibility class provides methods for inspecting Chromium's accessibility tree. The accessibility tree is used by assistive technology such as [screen readers](en.wikipedia.org/wiki/Screen_reader) or [switches](en.wikipedia.org/wiki/Switch_access).

Accessibility is a very platform-specific thing. On different platforms, there are different screen readers that might have wildly different output.

Rendering engines of Chromium, Firefox and WebKit have a concept of “accessibility tree”, which is then translated into different platform-specific APIs. Accessibility namespace gives access to this Accessibility Tree.

Most of the accessibility tree gets filtered out when converting from internal browser AX Tree to Platform-specific AX-Tree or by assistive technologies themselves. By default, Playwright tries to approximate this filtering, exposing only the “interesting” nodes of the tree.

Instance Method Summary collapse

Methods inherited from PlaywrightApi

#initialize, unwrap, wrap

Constructor Details

This class inherits a constructor from Playwright::PlaywrightApi

Instance Method Details

#snapshot(interestingOnly: nil, root: nil) ⇒ Object

Captures the current state of the accessibility tree. The returned object represents the root accessible node of the page.

> NOTE: The Chromium accessibility tree contains nodes that go unused on most platforms and by most screen readers. Playwright will discard them as well for an easier to process tree, unless `interestingOnly` is set to `false`.

An example of dumping the entire accessibility tree:

“`python sync snapshot = page.accessibility.snapshot() print(snapshot) “`

An example of logging the focused node's name:

“`python sync def find_focused_node(node):

if (node.get("focused"))
    return node
for child in (node.get("children") or []):
    found_node = find_focused_node(child)
    return found_node
return None

snapshot = page.accessibility.snapshot() node = find_focused_node(snapshot) if node:

print(node["name"])

“`



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# File 'lib/playwright_api/accessibility.rb', line 46

def snapshot(interestingOnly: nil, root: nil)
  wrap_impl(@impl.snapshot(interestingOnly: unwrap_impl(interestingOnly), root: unwrap_impl(root)))
end