async vs await javascript
async function myFetch() {
let response = await fetch('coffee.jpg');
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
let myBlob = await response.blob();
let objectURL = URL.createObjectURL(myBlob);
let image = document.createElement('img');
image.src = objectURL;
document.body.appendChild(image);
}
}
myFetch()
.catch(e => {
console.log('There has been a problem with your fetch operation: ' + e.message);
});async vs await javascript
fetch('coffee.jpg')
.then(response => {
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
return response.blob();
})
.then(myBlob => {
let objectURL = URL.createObjectURL(myBlob);
let image = document.createElement('img');
image.src = objectURL;
document.body.appendChild(image);
})
.catch(e => {
console.log('There has been a problem with your fetch operation: ' + e.message);
});async await vs then
async function fancyShowRainbow(){
const response = await fetch("rainbow.jpg");
const blob = await response.blob();
document.querySelector(".my-image").src = URL.createObjectURL(blob);
}
function showRainbow(){
fetch("rainbow.jpg")
.then(res => {
console.log(res);
return res.blob();
})
.then(blob => {
document.querySelector(".my-image").src = URL.createObjectURL(blob);
console.log(blob);
})
.catch(error => {
console.log("ERROR!!");
console.error(error);
});
}async vs await javascript
async function myFetch() {
let response = await fetch('coffee.jpg');
if (!response.ok) {
throw new Error(`HTTP error! status: ${response.status}`);
}
return await response.blob();
}
myFetch().then((blob) => {
let objectURL = URL.createObjectURL(blob);
let image = document.createElement('img');
image.src = objectURL;
document.body.appendChild(image);
}).catch(e => console.log(e));Copyright © 2021 Codeinu
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