shot-scraper accessibility URL command for dumping accessibility tree

[simonw]

Via Twitter I found out that Playwright has a utility function for dumping out the accessibility tree for a page: https://playwright.dev/python/docs/api/class-accessibility

I'm going to add this as a feature of shot-scraper.

[simonw]

I added this to the automated tests:

shot-scraper/.github/workflows/test.yml

Line 49 in f7f3d73

shot-scraper accessibility https://datasette.io/ > examples/datasette-accessibility.json

Here's the output from the most recent actions test run: https://gist.github.com/simonw/431e9075441463236850bab042b9d20d

I think this justifies the inclusion of this in a tool called shot-scraper - there's something potentially interesting about scraping the accessibility tree and storing it in a GitHub repository, since then you can use diffs to track changes made to that accessibility tree over time.

[simonw]

Here's a fun trick:

shot-scraper accessibility https://datasette.io \
    | jq .children | sqlite-utils insert \
    /tmp/accessibility.db nodes - --alter
open /tmp/accessibility.db