Source

File: wp-includes/l10n.php

function load_script_translations( $file, $handle, $domain ) {
	/**
	 * Pre-filters script translations for the given file, script handle and text domain.
	 *
	 * Returning a non-null value allows to override the default logic, effectively short-circuiting the function.
	 *
	 * @since 5.0.2
	 *
	 * @param string|false|null $translations JSON-encoded translation data. Default null.
	 * @param string|false      $file         Path to the translation file to load. False if there isn't one.
	 * @param string            $handle       Name of the script to register a translation domain to.
	 * @param string            $domain       The text domain.
	 */
	$translations = apply_filters( 'pre_load_script_translations', null, $file, $handle, $domain );

	if ( null !== $translations ) {
		return $translations;
	}

	/**
	 * Filters the file path for loading script translations for the given script handle and text domain.
	 *
	 * @since 5.0.2
	 *
	 * @param string|false $file   Path to the translation file to load. False if there isn't one.
	 * @param string       $handle Name of the script to register a translation domain to.
	 * @param string       $domain The text domain.
	 */
	$file = apply_filters( 'load_script_translation_file', $file, $handle, $domain );

	if ( ! $file || ! is_readable( $file ) ) {
		return false;
	}

	$translations = file_get_contents( $file );

	/**
	 * Filters script translations for the given file, script handle and text domain.
	 *
	 * @since 5.0.2
	 *
	 * @param string $translations JSON-encoded translation data.
	 * @param string $file         Path to the translation file that was loaded.
	 * @param string $handle       Name of the script to register a translation domain to.
	 * @param string $domain       The text domain.
	 */
	return apply_filters( 'load_script_translations', $translations, $file, $handle, $domain );
}