Error page viewport missing initial-scale=1

[kkmuffme]

​https://github.com/WordPress/wordpress-develop/blob/trunk/src/wp-includes/functions.php#L3871
The viewport meta should inclue initial-scale=1.0 to ensure high DPI/mobile display works as expected.

See why here:
​https://css-tricks.com/probably-use-initial-scale1/
​https://www.sitepoint.com/community/t/is-it-necessary-to-include-initial-scale-1-0-in-the-meta-viewport-tag/455119/2

Trac ticket: https://core.trac.wordpress.org/ticket/61988

add initial-scale=1.0

Trac ticket: https://core.trac.wordpress.org/ticket/61988

De-duping with #7294 which was created first

[swissspidy]

Looks reasonable, thanks for the ticket & PR!

[SergeyBiryukov]

Thanks for the ticket! Should this also be added in a few other places where it's currently missing?

• wp-admin/maint/repair.php​
• wp-admin/install.php​
• wp-admin/setup-config.php​
• wp-admin/upgrade.php​
• wp-login.php​

[mukesh27]

Some of the default themes also missing

[SergeyBiryukov]

Replying to mukesh27:

Some of the default themes also missing

Indeed, from Twenty Eleven to Twenty Fifteen.

[sabernhardt]

I gave the bundled themes changes a separate ticket: #61993.

@swissspidy please reopen, and close the other one, bc the other one is wrong. It expects a float 1.0 according to docs, not 1 (besides the fact I'm the OP of the trac ticket)

[sabernhardt]

The wp-includes directory has another viewport tag in wp-includes/functions.php​ (added in [32501]).

---

It expects a float 1.0 according to docs, not 1

I did not find a requirement to include the decimal, though it may be preferable.

• ​W3C's current draft does not mention values.
• ​W3C's 2016 draft shows the values 1, 0.1, 1.0, 2.0, and 10.
• ​MDN web docs mentions the default 1, minimum 0.1, and maximum 10.
• Both ​Safari Web Content Guide and ​Chrome for Developers suggest 1.0.
• ​Android Developers is the only resource I found that mentions "float" (in float_value), and its example uses 1.0.
• ​CSS Tricks recommends 1, and one of the commenters says that there is no difference between 1.0 and 1.

[sabernhardt]

#61993 was marked as a duplicate.

[SergeyBiryukov]

In 59026:

Bundled Themes: Add missing initial-scale value in viewport meta tag.

The viewport meta should include initial-scale=1.0 to ensure that high DPI/mobile display works as expected.

Includes standardizing on 1.0 vs. 1 for consistency.

References:

• ​CSS-Tricks: Probably Use initial-scale=1
• ​SitePoint Forums: Is it necessary to include initial-scale=1.0 in the meta viewport tag?

Props dhruvang21, sabernhardt, kkmuffme, mukesh27, swissspidy, SergeyBiryukov.
See #61988.

[SergeyBiryukov]

In 59027:

General: Add missing initial-scale value in viewport meta tags.

The viewport meta should include initial-scale=1.0 to ensure that high DPI/mobile display works as expected.

References:

• ​CSS-Tricks: Probably Use initial-scale=1
• ​SitePoint Forums: Is it necessary to include initial-scale=1.0 in the meta viewport tag?

Follow-up to [59026].

Props dhruvang21, sabernhardt, kkmuffme, mukesh27, narenin, swissspidy, SergeyBiryukov.
Fixes #61988.

Thanks for the PR! Merged in r59027.

Thanks for the PR! Merged in r59026 and 59027.