Only enqueue Contact Form 7 scripts when there is a form in the page

contact-form-7.php

/**
 * Contact Form 7 only enqueue scripts when there is a form in the page
 */

// Disable contact-form-7 recaptcha enqueue action
remove_action( 'wp_enqueue_scripts', 'wpcf7_recaptcha_enqueue_scripts', 20 );

// Dequeue contact-form-7 scripts
function contact_form_7_dequeue_scripts() {
	wp_dequeue_script( 'contact-form-7' );
}
add_action( 'wpcf7_enqueue_scripts', 'contact_form_7_dequeue_scripts' );

// Dequeue contact-form-7 styles
function contact_form_7_dequeue_styles() {
	wp_dequeue_style( 'contact-form-7' );
	wp_dequeue_style( 'contact-form-7-rtl' );
}
add_action( 'wpcf7_enqueue_styles', 'contact_form_7_dequeue_styles' );

// Trigger contact-form-7 enqueue actions when form shortcode is executed
function contact_form_7_enqueue_scripts( $out ) {

	// Remove dequeue actions
	remove_action( 'wpcf7_enqueue_scripts', 'contact_form_7_dequeue_scripts' );
	remove_action( 'wpcf7_enqueue_styles', 'contact_form_7_dequeue_styles' );

	// Enqueue contact-form-7 assets
	if ( wpcf7_load_js() ) {
		wpcf7_enqueue_scripts();
	}
	if ( wpcf7_load_css() ) {
		wpcf7_enqueue_styles();
	}
	wpcf7_recaptcha_enqueue_scripts();

	return $out;

}
add_filter( 'shortcode_atts_wpcf7', 'contact_form_7_enqueue_scripts' );