Is there a function similar to q=sort& or q=created:& to limit number of results from a JavaScript fetch?
fetch('https://jsonplaceholder.typicode.com/posts')
.then((res) => res.json())
.then((data) => { }
3 Answers
The best solution, of course, is if the https://jsonplaceholder.typicode.com/posts endpoint documents a limit or filter parameter you can send it.
Assuming the result is an array, or contains an array, the very-much-second-best solution is to filter the result (to apply criteria) and/or slice the result (to just apply a limit):
fetch('https://jsonplaceholder.typicode.com/posts')
.then((res) => res.json())
.then((data) => {
data = data.filter(entry => entry.created > someValue) // Created after X
.slice(0, 1000); // Limit to 1000
// ...use data...
})
.catch(error => { // <=== Don't forget to handle errors
// Handle error...
});
Note: Your fetch call is missing a check on res.ok (it's not just you, a lot of people make that mistake so many that I wrote it up on my anemic little blog):
fetch('https://jsonplaceholder.typicode.com/posts')
.then((res) => { // ***
if (!res.ok) { // ***
throw new Error("HTTP error " + res.status); // ***
} // ***
}) // ***
.then((res) => res.json())
.then((data) => {
data = data.filter(entry => entry.created > someValue)
.slice(0, 1000);
// ...use data...
})
.catch(error => {
// Handle error...
});
Comments
fetch(`http://localhost:3000/services?_page=${page}&_limit=3`)
You can add a payload to the body of the fetch, see above.
Comments
From https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch:
postData(`http://example.com/answer`, {answer: 42})
.then(data => console.log(JSON.stringify(data))) // JSON-string from `response.json()` call
.catch(error => console.error(error));
function postData(url = ``, data = {}) {
// Default options are marked with *
return 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; charset=utf-8",
// "Content-Type": "application/x-www-form-urlencoded",
},
redirect: "follow", // manual, *follow, error
referrer: "no-referrer", // no-referrer, *client
body: JSON.stringify(data), // body data type must match "Content-Type" header
})
.then(response => response.json()); // parses response to JSON
}
Not sure what exactly you want so here are 3 possibilities:
You can add a payload to the body of the fetch, see above.
You could simply url-encode it.
On res.json()) .then((data) => { } ... You can filter the data you want.
Hope this helps.
.filter?