Notes

Question 1

Why is it dangerous to use innerHTML in input elements?

Answer 1

It can allow the user to penetrate and control the js

Question 2

How can you save a number of html elements into an array automatically with JavaScript

Answer 2

1. In Html, give the elements the same class names
2. In your JavaScript, select them using getElementByClassName

Question 3

What do you call an the element that receives an event to execute a function?

Answer 3

Event handler

Question 4

What do you call the container of all the information of an event?

Answer 4

Event object

Question 5

In events, the executed function is called_____________?

Answer 5

Event handler

Question 6

In Events context, the executed functions’s parameter is called ___________?

Answer 6

Event object

Question 7

What’s the big four of JavaScript

Answer 7

Variable
Function
Array
Loop

Question 8

What is event bubbling

Answer 8

It happens when an element receives an event, and that event bubbles up (or you can say is transmitted or propagated) to its parent and ancestor elements in the DOM tree until it gets to the root element.

Question 9

How do you stop eventBubbling

Answer 9

Use stopPropogation method

Question 10

How do you link an external js file with HTML file?

Answer 10

Hhhhhh

Question 11

What’s a class in Javascript

Answer 11

It’s like a template that defines what properties (characteristics) and methods (actions) objects created from it will have.

Question 12

What’s the syntax for declaring a class?

Answer 12

class className {

   constructor(){

 this.property = value

}

functionName (){

}

}

Question 13

What is an instance in js?

Answer 13

It is a specific and unique individual object that is created from a class. It has it’s own property and can use the method in the class

Question 14

The five basic features of a JavaScript Class?

Answer 14

1. CONSTRUCTOR: used to initialize properties for the children objects.
2. METHOD: A function that the objects can call.
3. INHERITANCE: Sub classes created in your class.
4. SETTER & GETTER: You can retrieve (get) and modify(set) the value of a class
5. STATIC METHOD:

Question 15

Why do we use the new keyword before our classname()

Answer 15

It’s going to call the constructor, access every properties to them, make a new object out of it