Hello World component in Vue.js

Saturday 11 November 2023

Hello World component in Vue.js

To create a "Hello World" component in Vue.js, you can follow these steps:

Create a new file called HelloWorld.vue.
In the file, add the following code:

HTML

<template>
<div>
<h1>Hello World!</h1>
</div>
</template>

<script>
export default {
name: "HelloWorld",
};
</script>

Save the file.
In your main Vue application file, import the HelloWorld component and register it globally:

HTML

<div

id="app">

</div>

</template>

"./components/HelloWorld.vue";

export

default {
name: "App",
components: {
HelloWorld,
},
};
</script>

Start your Vue application.

You should now see the message "Hello World!" displayed on the page.

Here is an example of a complete Vue application that displays a "Hello World" component:

HTML

<!DOCTYPE html>
<html>
<head>
<title>Hello World Vue.js</title>
<script src="https://cdn.jsdelivr.net/vue/3.2.7/vue.global.prod.js"></script>
</head>
<body>
<div id="app"></div>
<script>
// Import the HelloWorld component.
import HelloWorld from "./components/HelloWorld.vue";

// Register the HelloWorld component globally.
Vue.component("HelloWorld", HelloWorld);

// Create a new Vue instance.
new Vue({
el: "#app",
});
</script>
</body>
</html>

To create a local component, you can register it in the components option of a parent component. For example, the following code creates a local HelloWorld component in the App component:

HTML

<template>
<div id="app">
<my-hello-world />
</div>
</template>

<script>
export default {
name: "App",
components: {
"my-hello-world": {
template: `<h1>Hello World!</h1>`,
},
},
};
</script>

Local components can only be used within the scope in which they are defined. This can be useful for creating components that are specific to a particular page or view.

I hope this helps!

Sources

1. https://strapi.io/blog/create-a-strapi-vue-blog-starter

2. https://www.onooks.com/how-to-include-vuetify-in-webstorm-project/

Interview questions and answers for "Hello World" component in Vue.js:

Q: What is a component in Vue.js?

A: A component in Vue.js is a reusable piece of code that encapsulates a specific part of the user interface. Components can be nested inside other components, which allows you to create complex UIs without duplicating code.

Q: What is the difference between a global component and a local component?

A: A global component can be used anywhere in the application. It is registered globally using the Vue.component() method. A local component can only be used within the scope in which it is defined. It is registered locally using the components option in a Vue component.

Q: How do you create a "Hello World" component in Vue.js?

A: To create a "Hello World" component in Vue.js, you can follow these steps:

Create a new file called HelloWorld.vue.
In the file, add the following code:

HTML

<template>
<div>
<h1>Hello World!</h1>
</div>
</template>

<script>
export default {
name: "HelloWorld",
};
</script>

Save the file.

Q: How do you register a global component in Vue.js?

A: To register a global component in Vue.js, you can use the Vue.component() method. For example, the following code registers the HelloWorld component globally:

Vue.component("HelloWorld", HelloWorld);

Q: How do you register a local component in Vue.js?

A: To register a local component in Vue.js, you can use the components option in a Vue component. For example, the following code registers the HelloWorld component locally in the App component:

<template>
<div id="app">
<my-hello-world />
</div>
</template>

<script>
export default {
name: "App",
components: {
"my-hello-world": HelloWorld,
},
};
</script>

Q: What are some best practices for using components in Vue.js?

A: Some best practices for using components in Vue.js include:

Keep your components small and focused. This will make them more reusable and maintainable.
Use descriptive names for your components. This will make your code more readable and understandable.
Document your components. This will help other developers to understand how your components work and how to use them.
Test your components. This will help to ensure that your components work as expected.

I hope this helps!