How many email clients support display:grid?

It works in 18 of 21, partial in 2, not supported in Outlook Classic.

Does display:grid work in Gmail iOS?

display:grid is partly supported in Gmail iOS. Closest to Gmail: Gmail iOS, which agrees on 251 of the 300 features both are tested on.

display:grid in Gmail

Works display:grid works in Gmail.

Works in 18 of 21 · partial in 2 · not supported in 1

Which clients

Works: Gmail, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, AOL Mail, Fastmail, Superhuman
Partial: Gmail Android, Gmail iOS
Not supported: Outlook Classic

The fix for the clients that need it

Needed in 3 of 21: Outlook Classic, Gmail Android and Gmail iOS.

Replace CSS Grid with table layout for email compatibility

after

11 lines

<table role="presentation" width="100%" cellpadding="0"
  cellspacing="0" border="0">
  <tr>
    <td width="50%" style="padding: 8px;" valign="top">
      Item 1
    </td>
    <td width="50%" style="padding: 8px;" valign="top">
      Item 2
    </td>
  </tr>
</table>

Show the original

before

5 lines

<div style="display: grid;
            grid-template-columns: 1fr 1fr; gap: 16px;">
  <div>Item 1</div>
  <div>Item 2</div>
</div>

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Every feature in Gmail · display:grid in every client

Questions

How many email clients support display:grid?: It works in 18 of 21, partial in 2, not supported in Outlook Classic.
Does display:grid work in Gmail iOS?: display:grid is partly supported in Gmail iOS. Closest to Gmail: Gmail iOS, which agrees on 251 of the 300 features both are tested on.

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