How to Use the JavaScript Fetch API to Get Data
fetch('http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0002/?gameid=221380')
.then(function(response) {
return response.json();
})
.then(function(myJson) {
console.log(JSON.stringify(myJson));
});get data from fetch api into variable
<script>
function getFromAPI(url, callback){
var obj;
fetch(url)
.then(res => res.json())
.then(data => obj = data)
.then(() => callback(obj))
}
getFromAPI('https://jsonplaceholder.typicode.com/posts', getData);
function getData(arrOfObjs){
var results = "";
arrOfObjs.forEach( (x) => {
results += "<p> Id: " + x.id + "<ul>"
Object.keys(x).forEach( (p) => {
results += "<li>" + (p + ": " + x[p]) + "</li>";
});
results += "</ul> </p> <hr>"
})
results += "";
document.getElementById("myDiv").innerHTML = results;
}
</script>get data from api in javascript
const GetData = [];
useEffect(() => {
fetch(API_URL)
.then((res) => res.json())
.then((data) => {
GetModesData.push(...data);
setDataState(GetData.map((d) => d.modeName));
});
}, []);fetch suntax
fetch('http://example.com/movies.json')
.then((response) => {
return response.json();
})
.then((data) => {
console.log(data);
});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
});Copyright © 2021 Codeinu
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