WP_Dependencies::add_data( string $handle, string $key, mixed $value ): bool

Source

public function add_data( $handle, $key, $value ) {
	if ( ! isset( $this->registered[ $handle ] ) ) {
		return false;
	}
	if ( 'conditional' === $key && '_required-conditional-dependency_' !== $value ) {
		_deprecated_argument(
			'WP_Dependencies->add_data()',
			'6.9.0',
			__( 'IE conditional comments are ignored by all supported browsers.' )
		);
	}

	return $this->registered[ $handle ]->add_data( $key, $value );
}

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