wp-includes/block-supports/typography.php:308Renders typography styles/content to the block wrapper.
$block_contentstring$blockarraystringfunction wp_render_typography_support( $block_content, $block ) { if ( ! isset( $block['attrs']['style']['typography']['fontSize'] ) ) { return $block_content; } $custom_font_size = $block['attrs']['style']['typography']['fontSize']; $fluid_font_size = wp_get_typography_font_size_value( array( 'size' => $custom_font_size ) ); /* * Checks that $fluid_font_size does not match $custom_font_size, * which means it's been mutated by the fluid font size functions. */ if ( ! empty( $fluid_font_size ) && $fluid_font_size !== $custom_font_size ) { // Replaces the first instance of `font-size:$custom_font_size` with `font-size:$fluid_font_size`. return preg_replace( '/font-size\s*:\s*' . preg_quote( $custom_font_size, '/' ) . '\s*;?/', 'font-size:' . esc_attr( $fluid_font_size ) . ';', $block_content, 1 ); } return $block_content;}Introduced in 6.1.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/block-supports/typography.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.