- Props pass data from parent to child:
props: ["title"], used as<course-card title="Vue">. - Bind dynamic values with
:title="course.name". - Emits send events from child to parent:
this.$emit("select", id), listened to with@select="handler".
Vue Props & Emits
Pass data down and send events up.
✍️ 3 exercises + code challenge in this lessonKey Takeaways: Vue Props & Emits
Mastering Vue Props & Emits helps you write clean and reliable Vue.js code. Follow standard conventions, test edge cases, and keep logic simple. Try running the code example below and complete the exercises to build confidence.
Vue Props & Emits Code Example
Vue.js<script src="https://unpkg.com/vue@3.5.12/dist/vue.global.prod.js"></script>
<div id="app">
<course-card v-for="c in courses" :key="c" :title="c" @enrol="chosen = $event"></course-card>
<p>Chosen: {{ chosen || 'none' }}</p>
</div>
<script>
const app = Vue.createApp({
data() { return { courses: ["Vue", "React", "Python"], chosen: null }; }
});
app.component("course-card", {
props: ["title"],
emits: ["enrol"],
template: `<div style="border:1px solid #ccc;padding:8px;margin:4px 0">
{{ title }} <button @click="$emit('enrol', title)">Enrol</button>
</div>`
});
app.mount("#app");
</script>
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Vue Props & Emits Practice Exercises
Check what you learned in “Vue Props & Emits”.
/ 3 solved
Fill in the blank
Declare the props a component accepts.
: ["title"]
✓ Correct!
Not quite. Try again.
Multiple choice
How does a child component send data to its parent?
✓ Correct!
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Code challenge
Give the "greet-user" component a name prop and render "Hi, {{ name }}" in a <p>. Use it as <greet-user name="Ali">.
Write the code in the live editor. Your answer is checked automatically.
✓ Solved
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