FAQ: JavaScript

JavaScript
FAQ
Published on: Jun 7, 2024

How to use template literals? 

const firstName = 'John';
const lastName = 'Doe';
const fullName = `${firstName} ${lastName}`; // John Doe


// The same code using string concatenation
const fullName = firstName + ' ' + lastName; // John Doe

When to use?

  • When you need to concatenate strings

How to inject JavaScript into HTML? 

<html>
  <body>
    <script type="module">
      console.log("Hello World!")
    </script>
  </body>
</html>
  • paste the JavaScript code inside the <script> tag.
  • use type="module" to indicate that the script should be treated as a JavaScript module .

DOM API

How to create an element?

document.createElement('div');

How to specify the element’s text?

element.textContent = 'Hello, world!';

How to append the element to the body?

document.body.append(element);

How to get element by id?

document.getElementById('myElement');

How to specify the element’s class?

element.className = 'my-class';