wp-admin/includes/misc.php:1094Displays the viewport meta in the admin.
One hook fires while wp_admin_viewport_meta() runs, in this order:
Filters the viewport meta in the admin.
function wp_admin_viewport_meta() { /** * Filters the viewport meta in the admin. * * @since 5.5.0 * * @param string $viewport_meta The viewport meta. */ $viewport_meta = apply_filters( 'admin_viewport_meta', 'width=device-width,initial-scale=1.0' ); if ( empty( $viewport_meta ) ) { return; } echo '<meta name="viewport" content="' . esc_attr( $viewport_meta ) . '">';}Introduced in 5.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/misc.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.