Directive v-for digunakan untuk merender daftar elemen berulang berdasarkan data array atau objek JavaScript.
v-for="(item, index) in koleksi".:key: Selalu berikan key unik (seperti ID database) agar algoritma Virtual DOM Vue dapat melacak identitas tiap elemen secara optimal saat terjadi penambahan atau penghapusan.v-for="n in 5".<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
<style>
body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
background: #f8fafc;
color: #1e293b;
padding: 24px;
margin: 0;
line-height: 1.6;
}
.vue-app-container {
background: white;
border-radius: 12px;
padding: 24px;
max-width: 520px;
margin: 0 auto;
box-shadow: 0 4px 15px rgba(0,0,0,0.06);
border-top: 4px solid #42b883;
}
.vue-header {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 18px;
padding-bottom: 12px;
border-bottom: 1px solid #f1f5f9;
}
.vue-title {
font-weight: 700;
color: #0d2e5c;
font-size: 16px;
display: flex;
align-items: center;
gap: 8px;
}
.badge-vue {
background: #42b883;
color: white;
padding: 3px 10px;
border-radius: 20px;
font-size: 11px;
font-weight: 700;
}
button {
background: #42b883;
color: white;
border: none;
padding: 8px 16px;
border-radius: 6px;
cursor: pointer;
font-weight: 600;
font-size: 13px;
transition: all 0.2s;
}
button:hover {
background: #33a06f;
}
input, select, textarea {
padding: 8px 12px;
border: 1px solid #cbd5e1;
border-radius: 6px;
font-size: 14px;
box-sizing: border-box;
outline: none;
}
input:focus, select:focus, textarea:focus {
border-color: #42b883;
box-shadow: 0 0 0 3px rgba(66, 184, 131, 0.15);
}
.pill {
display: inline-block;
background: #e2e8f0;
padding: 4px 10px;
border-radius: 12px;
font-size: 12px;
margin: 2px;
}
</style>
</head>
<body>
<div id="app" class="vue-app-container">
<div class="vue-header">
<span class="vue-title">🟢 Vue v-for</span>
<span class="badge-vue">Vue 3 Live</span>
</div>
<p><strong>Daftar Kursus Unggulan Skillance:</strong></p>
<ul style="padding-left:18px; margin:0 0 15px 0;">
<li v-for="(kursus, index) in daftarKursus" :key="kursus.id" style="margin-bottom:6px;">
<span style="font-weight:bold;">#{{ index + 1 }} {{ kursus.nama }}</span>
<span class="pill" :style="{ background: kursus.warna, color: '#fff' }">{{ kursus.kategori }}</span>
</li>
</ul>
<button @click="tambahKursus">+ Tambah Kursus Baru</button>
</div>
<script>
const { createApp, ref, reactive, computed, watch, onMounted } = Vue;
createApp({
data() {
return {
daftarKursus: [
{ id: 1, nama: "Vue.js 3 Frontend", kategori: "Frontend", warna: "#42b883" },
{ id: 2, nama: "C++ High Performance", kategori: "Systems", warna: "#00599c" },
{ id: 3, nama: "Python & AI Data", kategori: "AI & ML", warna: "#f59e0b" }
]
};
},
methods: {
tambahKursus() {
const idBaru = this.daftarKursus.length + 1;
this.daftarKursus.push({
id: idBaru,
nama: "Fullstack Web Cloud #" + idBaru,
kategori: "Fullstack",
warna: "#6366f1"
});
}
}
}).mount('#app');
</script>
</body>
</html>Perulangan v-for membaca setiap objek kursus dan secara reaktif merender elemen baru saat tombol ditekan.