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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 578 | |
| 579 | /** |
| 580 | * Calculate classes for the main <html> element. |
| 581 | * |
| 582 | * @since 1.0.0 |
| 583 | * |
| 584 | * @return void |
| 585 | */ |
| 586 | function twentytwentyone_the_html_classes() { |
| 587 | $classes = apply_filters( 'twentytwentyone_html_classes', '' ); |
| 588 | if ( ! $classes ) { |
| 589 | return; |
| 590 | } |
| 591 | echo 'class="' . esc_attr( $classes ) . '"'; |
| 592 | } |
| 593 | |
| 594 | /** |
| 595 | * Add "is-IE" class to body if the user is on Internet Explorer. |
| 596 | * |