fetch API

This chapter shows you how to make HTTP AJAX requests from the browser.

The Fetch API

Web APIs provide you with a way to make HTTP requests from JavaScript in the browser. This is done using the fetch function. fetch expects to be called with the URL as the first argument. It sends off the HTTP request and gives you back the response.

The fetch call below is used to fetch the weather for Boston. An if statement is then used to either print the forecast or the error message.

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fetch('http://localhost:3000/weather?address=Boston').then((response) => {
 response.json().then((data) => {
 if (data.error) {
 console.log(data.error)
 } else {
 console.log(data.location)
 console.log(data.forecast)
 }
 })
})

reference : Udemy ‘The Complete Node.js Developer course’ by Andrew Mead