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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 |
|---|---|
| 1738 | * Filters whether to add the `loading` attribute to the specified tag in the specified context. |
| 1739 | * |
| 1740 | * @since 5.5.0 |
| 1741 | * |
| 1742 | * @param bool $default Default value. |
| 1743 | * @param string $tag_name The tag name. |
| 1744 | * @param string $context Additional context, like the current filter name |
| 1745 | * or the function name from where this was called. |
| 1746 | */ |
| 1747 | return (bool) apply_filters( 'wp_lazy_loading_enabled', $default, $tag_name, $context ); |
| 1748 | } |
| 1749 | |
| 1750 | /** |
| 1751 | * Filters specific tags in post content and modifies their markup. |
| 1752 | * |
| 1753 | * Modifies HTML tags in post content to include new browser and HTML technologies |
| 1754 | * that may not have existed at the time of post creation. These modifications currently |
| 1755 | * include adding `srcset`, `sizes`, and `loading` attributes to `img` HTML tags, as well |
| 1756 | * as adding `loading` attributes to `iframe` HTML tags. |