Membangun aplikasi web di era modern memerlukan pondasi yang kokoh. Framework modern memberikan fleksibilitas luar biasa bagi developer untuk menghadirkan fitur kompleks secara cepat tanpa mengabaikan aspek keamanan dan keandalan sistem.
Tahapan Implementasi & Walkthrough Kode
Berikut adalah langkah demi langkah teknis yang dapat Anda ikuti langsung pada codebase Anda:
Tahap 1: Penulisan Kode & Konfigurasi
//import hook useState
import { useState } from 'react';
//import router
import Router from 'next/router';
//import layout
import Layout from '../../../components/layout';
//import axios
import axios from "axios";
function PostCreate() {
//state
const [image, setImage] = useState('');
const [title, setTitle] = useState('');
const [content, setContent] = useState('');
//state validation
const [validation, setValidation] = useState({});
//function "handleFileChange"
const handleFileChange = (e) => {
//define variable for get value image data
const imageData = e.target.files[0]
//check validation file
if (!imageData.type.match('image.*')) {
//set state "image" to null
setImage('');
return
}
//assign file to state "image"
setImage(imageData);
}
//method "storePost"
const storePost = async (e) => {
e.preventDefault();
//define formData
const formData = new FormData();
//append data to "formData"
formData.append('image', image);
formData.append('title', title);
formData.append('content', content);
//send data to server
await axios.post(`${process.env.NEXT_PUBLIC_API_BACKEND}/api/posts`, formData)
.then(() => {
//redirect
Router.push('/posts')
})
.catch((error) => {
//assign validation on state
setValidation(error.response.data);
})
};
return (
<Layout>
<div className="container" style={{ marginTop: '80px' }}>
<div className="row">
<div className="col-md-12">
<div className="card border-0 rounded shadow-sm">
<div className="card-body">
<form onSubmit={ storePost }>
<div className="form-group mb-3">
<label className="form-label fw-bold">Image</label>
<input type="file" className="form-control" onChange={handleFileChange}/>
</div>
{validation.image && (
<div className="alert alert-danger">
{validation.image}
</div>
)}
<div className="form-group mb-3">
<label className="form-label fw-bold">TITLE</label>
<input className="form-control" type="text" value={title} onChange={(e) => setTitle(e.target.value)} placeholder="Masukkan Title" />
</div>
{
validation.title &&
<div className="alert alert-danger">
{validation.title}
</div>
}
<div className="form-group mb-3">
<label className="form-label fw-bold">CONTENT</label>
<textarea className="form-control" rows={3} value={content} onChange={(e) => setContent(e.target.value)} placeholder="Masukkan Content" />
</div>
{
validation.content &&
<div className="alert alert-danger">
{validation.content}
</div>
}
<button className="btn btn-primary border-0 shadow-sm" type="submit">
SIMPAN
</button>
</form>
</div>
</div>
</div>
</div>
</div>
</Layout>
);
}
export default PostCreate
Tahap 2: Penulisan Kode & Konfigurasi
//import hook useState
import { useState } from 'react';
Tahap 3: Penulisan Kode & Konfigurasi
//import router
import Router from 'next/router';
Tahap 4: Penulisan Kode & Konfigurasi
//import layout
import Layout from '../../../components/layout';
Tahap 5: Penulisan Kode & Konfigurasi
//import axios
import axios from "axios";
Tahap 6: Penulisan Kode & Konfigurasi
//state
const [image, setImage] = useState('');
const [title, setTitle] = useState('');
const [content, setContent] = useState('');
Tahap 7: Penulisan Kode & Konfigurasi
//state validation
const [validation, setValidation] = useState({});
Tahap 8: Penulisan Kode & Konfigurasi
//function "handleFileChange"
const handleFileChange = (e) => {
//define variable for get value image data
const imageData = e.target.files[0]
//check validation file
if (!imageData.type.match('image.*')) {
//set state "image" to null
setImage('');
return
}
//assign file to state "image"
setImage(imageData);
}
Tahap 9: Penulisan Kode & Konfigurasi
<form onSubmit={ storePost }>
//...
</form>
Tahap 10: Penulisan Kode & Konfigurasi
//method "storePost"
const storePost = async (e) => {
//...
}
Tahap 11: Penulisan Kode & Konfigurasi
//define formData
const formData = new FormData();
Tahap 12: Penulisan Kode & Konfigurasi
//append data to "formData"
formData.append('image', image);
formData.append('title', title);
formData.append('content', content);
Tahap 13: Penulisan Kode & Konfigurasi
//send data to server
await axios.post(`${process.env.NEXT_PUBLIC_API_BACKEND}/api/posts`, formData)
Tahap 14: Penulisan Kode & Konfigurasi
//redirect
Router.push('/posts')
Tahap 15: Penulisan Kode & Konfigurasi
//assign validation on state
setValidation(error.response.data);
Selalu gunakan pendekatan deklaratif, validasi input seawal mungkin di boundary layer, dan lakukan logging terstruktur untuk memudahkan observability ketika sistem dijalankan di lingkungan cloud produksi.
Kesimpulan
Dengan mengikuti langkah-langkah terstruktur di atas, implementasi modul Anda akan jauh lebih rapi, aman dari bug umum, serta siap diskalakan ke lingkungan produksi.
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