FAQ: Your First React Component - Render A Component

Frequently Asked Questions React.js FAQ
1

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This community-built FAQ covers the “Render A Component” exercise from the lesson “Your First React Component”.

Paths and Courses
This exercise can be found in the following Codecademy content:

Web Development

Learn ReactJS: Part I

FAQs on the exercise Render A Component

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2

What is the advantage of doing all this instead of using vanilla Javascript to do the same thing (with document.createElement(), .appendChild(), etc)? Seems like an awful lot of code for a roundabout way to insert an HTML element.

1 Like
3

I don’t understand the benefits of using classes in that matter either. Using simple variables seems to be more readable. Why and when should we use classes?

1 Like
4

Why does nothing appear on the screen on the local host after completing the final exercise?

1 Like
5

I was going to ask the same thing, anyone have the answer to this?

7

is ‘< MyComponentClass />’ an object?

8

ReactDOM.render(

,

document.getElementById(‘app’)

);

Shouldn’t it be ‘new’ not ‘app’ cause were working on a the file new?