WP Editor Meta Box e2e: wait for TinyMCE init#78631
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Mamaduka
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May 25, 2026
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Size Change: 0 B Total Size: 8.04 MB ℹ️ View Unchanged
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Flaky tests detected in 170bd47. 🔍 Workflow run URL: https://github.com/WordPress/gutenberg/actions/runs/26396843552
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Fixes #43174, a flaky test that fails extraordinarily often last few days.
The issue is that we "Publish" a new post (including metabox data) a very short time after switching TinyMCE from "Code" mode to "Visual", and at that time the Visual mode is still initializing. When TinyMCE loses focus too quickly, it crashes:
because a selection object is
null. The switch to "Visual" never finishes:The saved content then includes a "bookmark"
spanelement that TinyMCE inserts for a very short moment to preserve selection:I'm fixing this by adding a better wait after every switch to "Visual", one that checks
window.tinyMCE.get(id).initialized.