Ajax

Setting Up Ajax Request

1. Setup the Request

var httpRequest = new XMLHttpRequest();

2. Method type

var method = 'GET'

3. URL or location of local file

-var url = 'filename.txt'
-var url = 'https://jsonplaceholder.typicode.com/posts';

4. Open the connection

httpRequest.open(method, url, true)

The 'true' argument is whether its asynchronous, other arguments that can be passed are Usernames and Passwords.

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Ready States Codes

• 0
• 1 Loading
• 2 Loaded
• 3 Interacting
• 4 Complete

Sample Code

Get Data

var xhttp = new XMLHttpRequest();
var url = 'https://jsonplaceholder.typicode.com/posts';
var method = 'GET';
xhttp.open(method, url);

xhttp.onreadystatechange = function(){
  if(xhttp.readyState == 4 && xhttp.status == 200){
    console.log(JSON.parse(xhttp.responseText));
    
  } else if(xhttp.readyState === XMLHttpRequest.DONE && xhttp.status !== 200)
  {
    console.log(xhttp.status);
  }
  
};

xhttp.send();