apply_filters( ‘gallery_style’, string $gallery_style )

Filters the gallery shortcode’s default CSS styles and opening HTML div container.

Description

To remove the CSS entirely, use the use_default_gallery_style filter instead:

add_filter( 'use_default_gallery_style', '__return_false' );

$gallery_stylestring: Default CSS styles and opening HTML div container for the gallery shortcode output.

$output = apply_filters( 'gallery_style', $gallery_style . $gallery_div );

Used by	Description
gallery_shortcode()`wp-includes/media.php`	Builds the Gallery shortcode output.

Version	Description
7.0.0	Removed the `type` attribute for any theme.
5.3.0	Removed the `type` attribute for `style` tags when the theme supports HTML5 style, and changed the quotes from single to double for other themes.
3.1.0	Added classes for number of columns and size to opening div.
2.5.0	Introduced.

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