public/subjects/first-words/README.md

First words

Resources

We provide you with some content to get started smoothly, check it out!

• Video DOM JS - createElement & append
• Video Set an element's className
• Video DOM JS - Set an element's properties
• Video DOM JS - Add an event listener to an element
• Memo DOM JS

Instructions

Now that you know how to make your creation move, what about making it communicate its first words to the world?

Let's put a second button in the top right corner of the page, that will add some text when clicked. Add it in the HTML structure:

<button id="speak-button">Click me to speak</button>

Add the button style in the CSS file:

button#speak-button {
  top: 100px;
}

Also add this class to style the text we will add:

.words {
  text-align: center;
  font-family: sans-serif;
}

In the JS file, like in the previous exercise, get the HTML button element with id speak-button and add an event listener on click event, triggering a function that will:

• create a new HTML element of type div
• set its text content to "Hello there!"
• set its className to words, that we just added earlier in the CSS
• use the append method to add it inside the torso element

Code examples

Create a new element and add it inside the body:

// create a new `div` element
const div = document.createElement('div') // the argument passed (string) is the html tag

// select the `body` and add the new `div` inside it
const body = document.querySelector('body')
body.append(div)

Expected output

This is what you should see in the browser.

Notions

• getElementById
• addEventListener / click event
• createElement
• Text content of a HTML element
• className
• append