Stay-Hack06 / js-commands-and-console

JavaScript - Commands and Console

Create + Connect A JavaScript File

1. After forking and cloning this repo, navigate into the repository's directory (use cd!) and create a folder called js in the root of this repo (use mkdir!).
2. In your js folder, create a file called custom.js.
3. Connect your js file to your index.html.

• In index.html, in the head, add your script tag. Remember that you need the path to the file—it's in the js folder!
• If you're not sure how to do the above, find an article online that describes how to connect your JS to your HTML—remember that the internet is your best friend for refreshers!

Dev Tools + Console.Log

1. Back in your custom.js file, write this command: console.log(“Hello, World!”);
2. Start Live Server.
3. Go to your browser.
   1. Open Dev Tools.
   2. Click on the "Console" tab.
   3. What do you see?
4. In your custom.js file, take away the quotes from your console.log, so it reads: console.log(Hello, World!);
   1. What happens in the console?
   2. Read the error very carefully.
   3. Remember errors are your friend!
5. Add the quotes back to your console.log.
6. Add another console.log so that your name appears in the browser’s dev tools.
7. Add 2+2 in a console.log and check your answer in the console.
   1. What happens when you add quotes around each number?
   2. What happens when you don’t?

Alerts

1. In your JS file, write alert(“Hello, World!”);
2. Refresh the page in the browser - what happens?
3. What are some real-life alerts you have seen?
4. Write another alert that copies one you might see on a website.
5. What happens to the first alert? (You can comment them out if they get annoying.)

Prompts (And Declaring Your First Variable!)

1. In your JS file, write:

let firstName = prompt(“What is your first name?”);
console.log(firstName);

2. Back in your browser, refresh the page.
3. Answer the prompt.
4. Look in the console, what do you see?
5. What happens when you add quotes to firstName?

console.log(“firstName”)