Which JavaScript statement should you execute first to enable your program to send asynchronous requests to the server over HTTP?a.xhr.send(null);b.let myReq = XMLHttpRequest.open();c.let myReq = new httpRequest();d.let myReq = new XMLHttpRequest();

Answered: Which JavaScript statement should you…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Which JavaScript statement should you execute first to enable your program to send asynchronous requests to the server over HTTP?

xhr.send(null);

let myReq = XMLHttpRequest.open();

let myReq = new httpRequest();

let myReq = new XMLHttpRequest();

Expert Solution

Step 1

d. let myReq = new XMLHttpRequest();

Explanation:

Server communication involves XMLHttpRequest (XHR) objects. Without requiring a complete page refresh, you may get data from a URL. This makes it possible for a Web page to update a specific section without interfering with the user's activities. XMLHttpRequest enables JavaScript users to send HTTP queries. Three purposes drive the use of XMLHttpRequest in contemporary web development:

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