POST, PUT e DELETE com Axios
Envie dados a uma API usando Axios POST e PUT, gerencie a resposta para atualizar o estado local e implemente uma ação de exclusão que remova um item tanto do servidor quanto da lista.
POST, PUT e DELETE com Axios é uma aula grátis de React Native Academy no CoddyKit. Esta é a aula 4 de 4. Você pode ler a aula completa abaixo gratuitamente — depois pratica ao vivo no navegador com um editor de código integrado e um tutor de IA 24/7. Faz parte do caminho de aprendizado de React Native Academy, e seu progresso é sincronizado entre a web e o app CoddyKit. O curso de React Native Academy inclui 4 aulas no total.
Partes desta aula ainda não foram traduzidas e aparecem em inglês.
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.
Perguntas Frequentes
A aula “POST, PUT e DELETE com Axios” é grátis?
Sim — o texto completo de “POST, PUT e DELETE com Axios” é grátis para ler aqui na web. Para praticá-la interativamente (um editor de código integrado e um tutor de IA 24/7) e desbloquear o restante do curso de React Native Academy, atualize para CoddyKit PRO. O curso de React Native Academy inclui 4 aulas no total.
O que vou aprender em “POST, PUT e DELETE com Axios”?
Envie dados a uma API usando Axios POST e PUT, gerencie a resposta para atualizar o estado local e implemente uma ação de exclusão que remova um item tanto do servidor quanto da lista. Você pratica React Native Academy com código prático que executa diretamente no navegador, e um tutor de IA 24/7 responde suas dúvidas enquanto trabalha na aula.
Preciso ter experiência prévia para começar React Native Academy?
Nenhuma experiência prévia é necessária. React Native Academy no CoddyKit é estruturado para alunos iniciantes até avançados, então você pode começar aqui ou desde o início e aprender no seu ritmo. Esta é a aula 4 de 4.
Quanto tempo leva a aula “POST, PUT e DELETE com Axios”?
A maioria das aulas CoddyKit leva cerca de 5–10 minutos. Cada uma é compacta e interativa, então você faz progresso constante e retoma exatamente de onde parou entre web e app.
Posso escrever e executar código nesta aula de React Native Academy?
Sim. Cada aula de React Native Academy inclui um editor de código integrado, então você escreve e executa código real direto no navegador e recebe feedback de IA instantaneamente — nenhuma configuração local necessária.
Todas as aulas deste curso
- O hook useEffect e matrizes de dependências
- Fazendo solicitações GET com Axios
- Gerenciando estados de carregamento e erro
- POST, PUT e DELETE com Axios