Loads Javascript and CSS of Contact Form 7 plugin only when necessary.

cf7-js-css.php

<?php
/**
 * Removes Javascript and styles of Contact Form 7 plugin.
 * Put this function in your theme's functions.php file.
 *
 * @see https://contactform7.com/loading-javascript-and-stylesheet-only-when-it-is-necessary/
 */
function my_theme_setup() {
	add_filter( 'wpcf7_load_js', '__return_false' );
	add_filter( 'wpcf7_load_css', '__return_false' );
}
add_action( 'after_setup_theme', 'my_theme_setup', 11 );

/**
 * Enqueue Javascript and styles of Contact Form 7 plugin only when necessary.
 * Change $my_contact_page as required.
 * Put this function in your theme's functions.php file.
 *
 * @see https://contactform7.com/loading-javascript-and-stylesheet-only-when-it-is-necessary/
 */
function aldolat_scripts() {
	$my_contact_page = array(
		'Contact',
		'My Page',
		'My Other Page',
		// add here other pages...
	);
	if ( is_page( $my_contact_page ) ) {
		if ( function_exists( 'wpcf7_enqueue_scripts' ) ) {
			wpcf7_enqueue_scripts();
		}
		if ( function_exists( 'wpcf7_enqueue_styles' ) ) {
			wpcf7_enqueue_styles();
		}
	}
}
add_action( 'wp_enqueue_scripts', 'aldolat_scripts' );