Progressive Web Application Development by Example

Adding Headers

Headers can be added either in the constructor or via the append method. The following example uses the Headers constructor:

var httpHeaders = {  
'Content-Type' : 'image/jpeg',  
'Accept-Charset' : 'utf-8',  
'X-My-Custom-Header' : 'custom-value'  
}; 
var myHeaders = new Headers(httpHeaders); 

Headers can also be added using the append method:

var myHeaders = new Headers(); 
myHeaders.append('Content-Type', 'image/jpeg'); 
myHeaders.append('Accept-Charset', 'utf-8); 
myHeaders.append('X-My-Custom-Header', 'custom-value'); 

A final way to add headers is by using the set method:

var myHeaders = new Headers(); myHeaders.set('Content-Type', 'image/jpeg'); myHeaders.set('Accept-Charset', 'utf-8); myHeaders.set('X-My-Custom-Header', 'custom-value'); ...