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Header built-in object

2022-04-23 17:15:00 【MiMenge】

effect

in the light of Request header perhaps Response head Do something

establish

Constructor creation

let headers = new Header();

During the creation process, you can add initialized header data to it

let header = new Header({
    
	'Content-Type' : 'application/json',
	----------------------------------
	"Content-Type' : 'text/html',
	·········
 });

Apis

Method	describe
append()	towards header Object key,value data Such as `header.append('Content-Type'. 'image/jpg');`
delete() ! Use with caution	Delete the specified header
entries	Iterate header information using iterators
has()	Check whether the header contains a key, Returns a Boolean value
get()	Get the specified header information
set()	Create header information key value
keys()	Traversal header information key
values()	Traversal header information value

Use

combination fetch Use

let header = new Headers({
    
	'Content-Type': 'application/json'
});

fetch('http://xxx/xxx/xx', {
    
	method: 'post',
	header,
	body: JSON.stringify({
    uname: 'Tom', age: 123});
}).then(data => data.text())
.then(value => console.log(value)).catch(err => console.error(err));