Fix bug where headings get duplicated #10
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khiga8
commented
Feb 14, 2022
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| appendAccessibilityInfo(); |
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This method will run on initial page load after DOM is complete.
From Content Script Chrome Docs:
Content scripts running at "document_idle" do not need to listen for the window.onload event, they are guaranteed to run after the DOM is complete. If a script definitely needs to run after window.onload, the extension can check if onload has already fired by using the document.readyState property.
khiga8
commented
Feb 14, 2022
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| chrome.runtime.onMessage.addListener(async (message) => { | ||
| document.querySelectorAll(".github-a11y-img-caption").forEach(el => el.remove()); | ||
| document.querySelectorAll(".github-a11y-heading-prefix").forEach(el => el.remove()); | ||
| appendAccessibilityInfo(); |
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We add event listener to listen for navigation events and clean up DOM & append elements again.
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This PR fixes a bug where the heading levels get appended multiple times to a page when using the back and forth button, or when clicking the tab of a page we're already on multiple times.
To prevent this, we should clean up the DOM whenever
onHistoryStateUpdatedevents are fired (indicating page navigation). We do not need to do this on initial page load.Screenshot of bug