Answers for "fetch api with form data"

4

fetch get request

// Example POST method implementation:
async function postData(url = '', data = {}) {
  // Default options are marked with *
  const response = await fetch(url, {
    method: 'POST', // *GET, POST, PUT, DELETE, etc.
    mode: 'cors', // no-cors, *cors, same-origin
    cache: 'no-cache', // *default, no-cache, reload, force-cache, only-if-cached
    credentials: 'same-origin', // include, *same-origin, omit
    headers: {
      'Content-Type': 'application/json'
      // 'Content-Type': 'application/x-www-form-urlencoded',
    },
    redirect: 'follow', // manual, *follow, error
    referrerPolicy: 'no-referrer', // no-referrer, *no-referrer-when-downgrade, origin, origin-when-cross-origin, same-origin, strict-origin, strict-origin-when-cross-origin, unsafe-url
    body: JSON.stringify(data) // body data type must match "Content-Type" header
  });
  return response.json(); // parses JSON response into native JavaScript objects
}

postData('https://example.com/answer', { answer: 42 })
  .then(data => {
    console.log(data); // JSON data parsed by `data.json()` call
  });
Posted by: Guest on September-13-2020
-1

fetch post form data

// It's almost copy paste ajax function,
// just select the right Form and set the right URL

document.getElementById('submitBtn').onclick = ajax

function ajax(e){
	e.preventDefault()

	// Get form element and create a formData object
	const form = document.getElementsByTagName('form')[0]
	const formData = {}

	// Get all input elements inside a form
    // and create key:value pairs inside formData
	form.querySelectorAll('input').forEach(element => {
		formData[element.name] = element.value
	})

	// Send data to your backend
	fetch(url, {
		method: "POST",
    	headers: {
    		"Content-Type": "application/json"
    	},
    	body: JSON.stringify(formData)
	})
}
Posted by: Guest on July-28-2021

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