Get current post/page properties and use it on your scripts through JSON (Wordpress)

get-current-postdata-through-json.php

<?php
// In your wp_enqueue_scripts, just declare it when you localise your script or include it in your ajax array
	add_action( 'wp_enqueue_scripts', 'wp_enqueue_child_scripts' );
	function wp_enqueue_child_scripts() {
  
		// Globalize post variable to get current post data
		global $post;
		
		// Enqueue child script used
		wp_enqueue_script( 'custom-name', get_stylesheet_directory_uri() . '/js/script.js', array( 'jquery' ) );
		
		// localized script used
		wp_localize_script(
					'custom-name',
					'custom_ajax_function_name',
						array(
							'ajaxurl'	=> admin_url( 'admin-ajax.php' ),
					// We use json_encode to convert arrays or object to JSON representation
							'page_data' => json_encode($post)
						)
				);
	}

script.js

// In your script, call data using JSON.parse() function
	jQuery(document).ready(function($){

		var data = JSON.parse(custom_ajax_function_name.page_data);
		
		//To get data list
		console.log(data);
		
		// Ex: Getting the post author ID
		var author_id = data.post_author;

	});