websupporter

$.ajax( {
    url: wpApiSettings.root + 'wp/v2/posts/1',
    method: 'POST',
    beforeSend: function ( xhr ) {
        xhr.setRequestHeader( 'X-WP-Nonce', wpApiSettings.nonce );
    },
    data:{
        'title' : 'Hello Moon'
    }
} ).done( function ( response ) {

websupporter

<?php
/**
 * Plugin Name: WordPress REST API filter query
 * Description: This plugin adds a "filter" query parameter to API collections to filter returned results based on arbitrary WP_Query parameters, adding back the "filter" parameter that was removed from the API when it was merged into WordPress core.
 * Author: WP REST API Team
 * Author URI: http://v2.wp-api.org
 * Version 0.1
 * License: GPL2+
 **/

websupporter

<?php
function only_allow_logged_in_rest_access( $access ) {
        if( ! is_user_logged_in() ) {
                return new WP_Error( 'rest_cannot_access', 'Du kannst nur eingeloggt die REST API nutzen.', array( 'status' => rest_authorization_required_code() ) );
        }

        return $access;
}
add_filter( 'rest_authentication_errors', 'only_allow_logged_in_rest_access' );

websupporter

<?php
add_action( 'after_setup_theme', 'add_frontkit_support' );
function add_frontkit_support() {

	add_theme_support( 'frontkit', array(
			'title'           => '.single-post .entry-title',
			'content'         => '.single-post .entry-content',
	) );
}

websupporter

<?php

add_filter( 'the_content', function( $content, $post_id ) {

	// Run only on blog posts.
	if ( 'post' !== get_post_type( $post_id ) ) {
		return $content;
	}

	// Do not run on the old blog posts, where we already have placed our author bio.

websupporter

<?php
/**
 * Plugin Name: Nonces in der REST API Not working
 * Author: Websupporter
 * Plugin URL: http://websupporter.net/blog/de/nonces-in-der-rest-api/
 * Licence: GPL
 **/


add_action( 'wp_ajax_nonce-test', 'ajax_nonce_test' );

websupporter

<?php

/**
 * Plugin Name: Nonces in der REST API
 * Author: Websupporter
 * Plugin URL: http://websupporter.net/blog/de/nonces-in-der-rest-api/
 * Licence: GPL
 **/

websupporter

<?php
add_action( 'after_setup_theme', 'theme_start_content' );
function theme_starter_content() {

	add_theme_support( 'starter-content', array(
		'widgets' => array(
			'sidebar-1' => array(
				'text_business_info',
				'search',
			),

websupporter

<?php
add_action( 'after_setup_theme', 'theme_start_content' );
function theme_starter_content() {

	add_theme_support( 'starter-content', array(
		'widgets' => array(
			'sidebar-1' => array(
				'text_business_info',
				'search',
				array(

websupporter

<?php

class Mein_Widget extends WP_Widget {

	function __construct() {
		// Instantiate the parent object
		parent::__construct( 'meine-base-id', _x( 'My widget', 'theme-slug' ) );
	}

	function widget( $args, $instance ) {