Attribute selector

The attribute selector ([attr]) targets elements with this specific attribute.

Estimated Support About

39.02% + 34.15% = 73.17%

Apple Mail

macOS

14.0

iOS

14.3

Gmail

Desktop Webmail

2020-12
5
2023-02
5

iOS

2020-12
5 6
2023-02
5 6

Android

2020-12
5 6
2023-02
5 6

Mobile Webmail

2020-02

Outlook

Windows

2007
2010
2013
2016
2019

Windows Mail

2020-12

macOS

2011
2016
16.80
1 2 3

Outlook.com

2020-12
1 2 3
2024-01
1 2 3

iOS

2020-12
1 2

Android

2020-12
1 2

Yahoo! Mail

Desktop Webmail

2020-12
4

iOS

2020-12
4

Android

2020-12
4

AOL

Desktop Webmail

2020-12
4

iOS

2020-12
4

Android

2020-12
4

Samsung Email

Android

6.0

Mozilla Thunderbird

macOS

78.5

ProtonMail

Desktop Webmail

2020-03

iOS

2020-03

Android

2020-03

Fastmail

Desktop Webmail

2021-07

HEY

Desktop Webmail

2020-06

Orange

Desktop Webmail

2020-12
2021-03

iOS

2020-12

Android

2020-12

LaPoste.net

Desktop Webmail

2021-08

SFR

Desktop Webmail

2020-12

iOS

2020-12

Android

2020-12

GMX

Desktop Webmail

2022-06

iOS

2022-06

Android

2022-06

1&1

Desktop Webmail

2022-06

Android

2022-06

Mail.ru

Desktop Webmail

2020-10
4

WEB.DE

Desktop Webmail

2022-06

iOS

2022-06

Android

2022-06

WP.pl

Desktop Webmail

2025-09

Notes

This page reflects support for different syntaxes: [attr], [attr="value"], [attr~="value"], [attr|="value"], [attr^="value"], [attr$="value"], [attr*="value"].

  • 1

    Partial. Can not be used with a class selector (.test[class]). Must be used solo ([class]) or with an element selector (td[class]).

  • 2

    Partial. Only supports [attr], [attr=value], [attr~=value], [attr|=value] syntaxes.

  • 3

    Buggy. A class="test" in the HTML is prefixed class="x_test", but an attribute selector stays unprefixed [class="test"].

  • 4

    Partial. Only supports [attr=value] syntax.

  • 5

    Partial. Only supports [attr~=value] syntax. Only class as an attribute name is known to be supported.

  • 6

    Partial. Doesn’t work with non Google accounts.

Resources

Sponsor

Resend

Sponsored by Resend. Email for developers. The best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale.

Know something we don't?

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Test it yourself

This feature was last tested on December 15, 2020.

If you want to test this feature in the same conditions as we did, you can get our test code and run a test by yourself. Make sure to follow our testing recommendations first.

View the test code