POST, PUT, dan DELETE dengan Axios
Kirim data ke API menggunakan POST dan PUT dari Axios, tangani respons untuk memperbarui keadaan lokal, lalu terapkan tindakan DELETE yang menghapus item dari server dan daftar.
POST, PUT, dan DELETE dengan Axios adalah pelajaran React Native Academy gratis di CoddyKit. Ini adalah pelajaran 4 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar React Native Academy, dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus React Native Academy mencakup 4 pelajaran total.
Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.
CRUD Operations with Axios
Beyond fetching data, most apps need to create, update, and delete resources on a server. Axios provides axios.post, axios.put, axios.patch, and axios.delete methods that map directly to HTTP verbs. Each method returns a Promise resolving to the server's response.
POST: Creating a New Resource
axios.post(url, data) sends a request body as JSON to create a new resource. The second argument is the request body object — Axios automatically serializes it to JSON and sets the Content-Type: application/json header. The server typically responds with the created resource including its assigned ID.
const createPost = async (title, body) => {
const response = await axios.post(
'https://jsonplaceholder.typicode.com/posts',
{ title, body, userId: 1 }
);
console.log('Created:', response.data);
// { id: 101, title: '...', body: '...', userId: 1 }
return response.data;
};Adding a New Item to State After POST
After a successful POST, add the returned item to your local state array to reflect the creation without a full re-fetch. Use the functional form of setState to safely merge the new item with the existing array. The server-assigned ID is used as the unique key in subsequent renders.
const handleCreate = async (formData) => {
try {
const response = await axios.post('/posts', formData);
const newPost = response.data;
setPosts((prev) => [newPost, ...prev]);
} catch (err) {
setError('Failed to create post');
}
};PUT: Replacing a Full Resource
axios.put(url, data) replaces an entire resource with the provided data. Include the resource's ID in the URL and send all fields in the body. PUT is idempotent — calling it multiple times with the same data produces the same result. Use PUT when you are replacing the complete resource, not just updating a few fields.
const updatePost = async (postId, updatedData) => {
const response = await axios.put(
'/posts/' + postId,
updatedData
);
return response.data;
};PATCH: Partial Update
axios.patch(url, data) sends only the changed fields instead of the entire resource. This is more efficient than PUT when you are updating a single field (like a user's avatar or a post's title). Many REST APIs support both PUT and PATCH — check the API documentation to see which one is expected.
// Only update the title, leave other fields untouched
const patchPostTitle = async (postId, newTitle) => {
const response = await axios.patch(
'/posts/' + postId,
{ title: newTitle }
);
return response.data;
};Updating State After PUT/PATCH
After a successful update, replace the old item in the state array with the server's returned version. Use Array.map to iterate over the state and swap the matching item. This keeps the local state in sync with the server without a full re-fetch.
const handleUpdate = async (postId, updatedData) => {
try {
const response = await axios.put('/posts/' + postId, updatedData);
const updatedPost = response.data;
setPosts((prev) =>
prev.map((p) => (p.id === postId ? updatedPost : p))
);
} catch (err) {
setError('Failed to update post');
}
};DELETE: Removing a Resource
axios.delete(url) removes the resource at the given URL. Most APIs return a 200 or 204 (No Content) response on successful deletion. Unlike POST and PUT, DELETE does not send a request body. The third argument to axios.delete can pass config options like auth headers.
const deletePost = async (postId) => {
await axios.delete('/posts/' + postId);
console.log('Post deleted');
};Removing the Item from State After DELETE
After a successful DELETE, filter the item out of your local state array with Array.filter. The UI updates immediately without a round-trip to re-fetch the full list. If the DELETE fails, the error is caught and the item remains in state — showing the user an error message.
const handleDelete = async (postId) => {
try {
await axios.delete('/posts/' + postId);
setPosts((prev) => prev.filter((p) => p.id !== postId));
} catch (err) {
setError('Failed to delete post');
}
};Optimistic Updates
Optimistic updates update the local state immediately (before the server confirms) to make the UI feel instant. If the request fails, revert to the original state and show an error. This pattern is used by Twtter's like button and Gmail's delete — the action feels instant even over a slow connection.
const handleDelete = async (postId) => {
const originalPosts = posts;
// Update immediately
setPosts((prev) => prev.filter((p) => p.id !== postId));
try {
await axios.delete('/posts/' + postId);
} catch (err) {
// Revert on failure
setPosts(originalPosts);
setError('Delete failed. Please try again.');
}
};Uploading Files with FormData
To upload an image or file via POST, create a FormData object, append the file using the React Native URI format, and pass it to axios.post. Set the Content-Type header to multipart/form-data so the server parses it correctly as a file upload rather than JSON.
const uploadAvatar = async (imageUri) => {
const formData = new FormData();
formData.append('avatar', {
uri: imageUri,
name: 'avatar.jpg',
type: 'image/jpeg',
});
const response = await axios.post('/user/avatar', formData, {
headers: { 'Content-Type': 'multipart/form-data' },
});
return response.data.avatarUrl;
};Chaining Mutations: Create Then Navigate
After a successful POST or PUT, you often want to navigate the user to the newly created resource's detail screen. Chain the navigation call after the state update in the success path of your try/catch. Pass the new resource's ID or the full object as navigation params.
const handleCreatePost = async (formData) => {
try {
const response = await axios.post('/posts', formData);
const newPost = response.data;
setPosts((prev) => [newPost, ...prev]);
navigation.navigate('PostDetail', { postId: newPost.id });
} catch (err) {
setError('Failed to create post');
}
};Quick Check
Test your understanding of POST, PUT, and DELETE requests with Axios from this lesson.
Lesson Recap
In this lesson you learned: axios.post sends a JSON body to create a resource and returns the created item from the server, axios.put/patch replaces or partially updates a resource — update state with Array.map after success, and axios.delete removes a resource — update state with Array.filter and use optimistic updates for a snappy UX. Next up we explore Redux Toolkit for managing complex application state.
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Pertanyaan yang Sering Diajukan
Apakah pelajaran “POST, PUT, dan DELETE dengan Axios” gratis?
Ya — teks lengkap “POST, PUT, dan DELETE dengan Axios” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus React Native Academy, upgrade ke CoddyKit PRO. Kursus React Native Academy mencakup 4 pelajaran total.
Apa yang akan aku pelajari di “POST, PUT, dan DELETE dengan Axios”?
Kirim data ke API menggunakan POST dan PUT dari Axios, tangani respons untuk memperbarui keadaan lokal, lalu terapkan tindakan DELETE yang menghapus item dari server dan daftar. Kamu berlatih React Native Academy dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.
Apakah aku perlu pengalaman untuk memulai React Native Academy?
Tidak diperlukan pengalaman sebelumnya. React Native Academy di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 4 dari 4.
Berapa lama pelajaran “POST, PUT, dan DELETE dengan Axios” memakan waktu?
Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.
Bisakah aku menulis dan menjalankan kode dalam pelajaran React Native Academy ini?
Ya. Setiap pelajaran React Native Academy menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.
Semua pelajaran dalam kursus ini
- Hook useEffect dan Array Dependensi
- Membuat Permintaan GET dengan Axios
- Menangani Keadaan Pemuatan dan Kesalahan
- POST, PUT, dan DELETE dengan Axios