JavaScript in HTML — HTML Technical Interview Questions & Answers

<script> placement, defer/async and inline handlers.

JavaScript in HTML

  • JavaScript (html) is a HTML topic. In plain words you use it for a short JavaScript html example in a web page in the browser. Don’t start with a slogan — start with that picture.
  • Smallest example: the smallest JavaScript html example you can type. Type it, run it, and say what you see. If you can do that from memory, you know JavaScript (html).
  • From the example next to this theory: <script> placement, defer/async and inline handlers.
  • Trap: only saying “JavaScript html” with no example. Fix that before you talk about advanced HTML.
  • Viva: what is JavaScript (html)? Then show the smallest JavaScript html example you can type. Then name the trap.

Technical Interview Tip: What is JavaScript (html)? Show this: the smallest JavaScript html example you can type. Trap: only saying “JavaScript html” with no example.

Code Examples for JavaScript in HTML

JavaScript in HTML — working example

<!-- Prefer external + defer so HTML parses first -->
<script src="/app.js" defer></script>

<!-- Module scripts are deferred by default -->
<script type="module" src="/main.js"></script>

JavaScript in HTML — defer runs after parse in order; async runs when ready (order not guaranteed); modules defer by default.

How to Explain JavaScript in HTML to an Interviewer

What is JavaScript (html)?

Used for a short JavaScript html example a web page in the browser Not just the heading

Give one small example of JavaScript (html).

the smallest JavaScript html example you can type <script> placement, defer/async and inline handlers

What mistake do beginners make with JavaScript (html)?

only saying “JavaScript html” with no example Show the fix

Where do you use JavaScript (html)?

a web page in the browser a short JavaScript html example