100Devs - LwL - Class 09 - JavaScript Intro

According to the golden rule: where does the behavior and interaction goes?

• In a separate JavaScript file

• inline with the html

• On the server only

How many IDs can an element have?

• One ID per element

• As many as necessary

How many classes can an element have?

• As many as necessary

• One class per element

What does this represent in JS: || ?

• OR

• AND

• BANG

What does this represent in JS: && ?

• AND

• BANG

• OR

What is the DOM?

• It is the rendering of the HTML code by the browser

• It is the javaScript code in the JS file

• It is code that will be changed in the HTML file

What can JavaScript do with the rendered page (DOM) on the browser?

• It can alter the way the element are displayed, amongst other things

• It can collect data inputs from the user

• It can create new html elements on the browser

• All are correct

Which element is being selected on this javascript snippet:

document.getElementById("purple")

• The element on the DOM/HTML that has the id purple

• The element on the DOM/HTML that has the class purple

• Any element that is purple

What is an event listenter?

• It is a way for javascript to wait for events, such as a click, to happen. And when they do happen, javascript acts

• It is a way for HTML to wait for events, such as a click, to happen. And when they do happen, javascript acts

What are variables?

• Variables tell the program to remember a value to be used later on.

• Variables is a number that can be changed, like "x" in math