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Already on GitHub? Sign in to your account adds "Joyful Animations" #59

hteumeuleu opened this issue Apr 9, 2019 · 0 comments


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commented Apr 9, 2019

About six months ago, Microsoft introduced a new feature in called "Joyful Animations". It is turned on by default but can be turned off per user settings. According to Microsoft:

Outlook automatically shows a celebratory burst of colorful shapes in the reading pane when you open a message that includes words like Happy Birthday and Congratulations.

Screenshot of settings showing the Joyful Animations option

The feature highlights certain keywords with a different background color and text color. When hovering the keywords, a confetti animation appears.

An example of confetti animation in

Based on the owa.ReadingPane.mail.js file on, this only applies to three expressions (not case sensitive):

  • Happy Birthday
  • Congrats
  • Congratulations

The following code in an email:

<h1 class="foo">Congratulations</h1>

…will be transformed by into:

<h1 class="x_foo"><span data-markjs="true" class="markim8ebdahz _2Th5e9ZyZUAFfXZXt-uLkQ">Congratulations</span></h1>

I haven't found a way to prevent this transformation. However, the styles can be overrided by adding the following rule:

[class="x_foo"] span { background: inherit !important; color:inherit !important; }

@hteumeuleu hteumeuleu added the feature label Apr 11, 2019

@hteumeuleu hteumeuleu added Outlook and removed feature labels Jul 10, 2019

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