wp-includes/interactivity-api/class-wp-interactivity-api.php:861Processes the data-wp-bind directive.
$pWP_Interactivity_API_Directives_Processor$modestring private function data_wp_bind_processor( WP_Interactivity_API_Directives_Processor $p, string $mode ) { if ( 'enter' === $mode ) { $all_bind_directives = $p->get_attribute_names_with_prefix( 'data-wp-bind--' ); foreach ( $all_bind_directives as $attribute_name ) { list( , $bound_attribute ) = $this->extract_prefix_and_suffix( $attribute_name ); if ( empty( $bound_attribute ) ) { return; } // Skip if the bound attribute is an event handler. if ( str_starts_with( $bound_attribute, 'on' ) ) { _doing_it_wrong( __METHOD__, sprintf( /* translators: %s: The directive, e.g. data-wp-on--click. */ __( 'Binding event handler attributes is not supported. Please use "%s" instead.' ), esc_attr( 'data-wp-on--' . substr( $bound_attribute, 2 ) ) ), '6.8.5' ); continue; } $attribute_value = $p->get_attribute( $attribute_name ); $result = $this->evaluate( $attribute_value ); if ( null !== $result && ( false !== $result || ( strlen( $bound_attribute ) > 5 && '-' === $bound_attribute[4] ) ) ) { /* * If the result of the evaluation is a boolean and the attribute is * `aria-` or `data-, convert it to a string "true" or "false". It * follows the exact same logic as Preact because it needs to * replicate what Preact will later do in the client: * https://github.com/preactjs/preact/blob/ea49f7a0f9d1ff2c98c0bdd66aa0cbc583055246/src/diff/props.js#L131C24-L136 */ if ( is_bool( $result ) && ( strlen( $bound_attribute ) > 5 && '-' === $bound_attribute[4] ) ) { $result = $result ? 'true' : 'false'; } $p->set_attribute( $bound_attribute, $result ); } else { $p->remove_attribute( $bound_attribute ); } } } }Introduced in 6.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/interactivity-api/class-wp-interactivity-api.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.