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Accessibility

The Accessibility class provides methods for inspecting Chromium's accessibility tree. The accessibility tree is used by assistive technology such as screen readers or switches.

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.


Deprecated

snapshot

Added in: v1.8 accessibility.snapshot
Deprecated

This method is deprecated. Please use other libraries such as Axe if you need to test page accessibility. See our Node.js guide for integration with Axe.

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 interesting_only is set to false.

Usage

An example of dumping the entire accessibility tree:

snapshot = page.accessibility.snapshot()
print(snapshot)

An example of logging the focused node's name:

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

snapshot = page.accessibility.snapshot()
node = find_focused_node(snapshot)
if node:
print(node["name"])

Arguments

  • interesting_only bool (optional)#

    Prune uninteresting nodes from the tree. Defaults to true.

  • root ElementHandle (optional)#

    The root DOM element for the snapshot. Defaults to the whole page.

Returns

  • NoneType|Dict#
    • role str

      The role.

    • name str

      A human readable name for the node.

    • value str|float

      The current value of the node, if applicable.

    • description str

      An additional human readable description of the node, if applicable.

    • keyshortcuts str

      Keyboard shortcuts associated with this node, if applicable.

    • roledescription str

      A human readable alternative to the role, if applicable.

    • valuetext str

      A description of the current value, if applicable.

    • disabled bool

      Whether the node is disabled, if applicable.

    • expanded bool

      Whether the node is expanded or collapsed, if applicable.

    • focused bool

      Whether the node is focused, if applicable.

    • modal bool

      Whether the node is modal, if applicable.

    • multiline bool

      Whether the node text input supports multiline, if applicable.

    • multiselectable bool

      Whether more than one child can be selected, if applicable.

    • readonly bool

      Whether the node is read only, if applicable.

    • required bool

      Whether the node is required, if applicable.

    • selected bool

      Whether the node is selected in its parent node, if applicable.

    • checked bool|"mixed"

      Whether the checkbox is checked, or "mixed", if applicable.

    • pressed bool|"mixed"

      Whether the toggle button is checked, or "mixed", if applicable.

    • level int

      The level of a heading, if applicable.

    • valuemin float

      The minimum value in a node, if applicable.

    • valuemax float

      The maximum value in a node, if applicable.

    • autocomplete str

      What kind of autocomplete is supported by a control, if applicable.

    • haspopup str

      What kind of popup is currently being shown for a node, if applicable.

    • invalid str

      Whether and in what way this node's value is invalid, if applicable.

    • orientation str

      Whether the node is oriented horizontally or vertically, if applicable.

    • children List[Dict]

      Child nodes, if any, if applicable.