CSP nonce for WordPress scripts (≥ v.5.7)

<?php

/**
 * Plugin or functions.php
 */

function mxd_csp_nonce() {
	// generate nonce here
	return 'sha384-7TB/burIFPND3rU7p38KUmP8C6LhM+Ybd8yzSEb1FvUgyJd9TMJ9HqWP3q+sFZOM';
}


function mxd_wp_script_attributes( $attr ) {
	if ( ! isset( $attr['nonce'] ) ) {
		$attr['nonce'] = mxd_csp_nonce();
	}

	$attr['source'] = external;

	return $attr;
};
add_filter( 'wp_script_attributes', 'mxd_wp_script_attributes' );



function mxd_wp_inline_script_attributes( $attr ) {
	if ( ! isset( $attr['nonce'] ) ) {
		$attr['nonce'] = mxd_csp_nonce();
	}

	$attr['source'] = inline;

	return $attr;
};
add_filter( 'wp_inline_script_attributes', 'mxd_wp_inline_script_attributes' );


/**
 * footer.php
 */

wp_print_inline_script_tag(
	'document.createElement("video");',
	array(
		'id'    => 'create-video-js',
		'async' => true,
	)
);

wp_print_script_tag(
	array(
		'id'        => 'jquery-"js"-2.3.4',
		'integrity' => 'sha384-long_hash',
		'src'       => esc_url( 'https://domain.tld/jquery-2.3.4.min.js' ),
	)
 );