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[BUGFIX beta] Migrate autorun microtask queue to Promise.then #17618

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merged 1 commit into from
Feb 20, 2019

Commits on Feb 20, 2019

  1. [BUGFIX beta] Update Backburner.js to 2.5.0.

    The primary change in Backburner.js is to use the Promise microtask
    queue primarily and falling back to MutationObserver when Promise is not
    present.
    
    The test changes here are to migrate from `window.onerror` to
    `window.onunhandledrejection` hooks (due to moving the microtask
    delivery from `MutationObserver` to native `Promise`). The cross
    platform support for `onunhandledrejection` is a tad spotty (Chrome,
    Edge, and _soon_ Firefox), so I had to guard in other browsers.
    rwjblue committed Feb 20, 2019
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