https://github.com/pktcodes/javascript-dom-basics

JavaScript & DOM Basics
https://github.com/pktcodes/javascript-dom-basics

arrays comments conditional-statements css3 data-types dom events functions git helper-methods html5 javascript john-smilga keywords localstorage logical-operators loops objects selectors statements

Last synced: 3 months ago
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JavaScript & DOM Basics

• Host: GitHub
• URL: https://github.com/pktcodes/javascript-dom-basics
• Owner: pktcodes
• Created: 2023-02-02T05:52:08.000Z (over 2 years ago)
• Default Branch: master
• Last Pushed: 2023-02-20T05:05:05.000Z (about 2 years ago)
• Last Synced: 2025-01-02T11:44:28.729Z (5 months ago)
• Topics: arrays, comments, conditional-statements, css3, data-types, dom, events, functions, git, helper-methods, html5, javascript, john-smilga, keywords, localstorage, logical-operators, loops, objects, selectors, statements
• Language: JavaScript
• Homepage: https://javascript-dom-basics-prod.netlify.app/
• Size: 1.65 MB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## Variables #1

1. create "firstName" and "last_name" variables

2. assign your values

3. create "address" variable and assign "main street"

   value to it

4. re-assign address to "first street" later

5. log all values in the console

## Concatenate Strings #2

1. create "street" and "country" variables

2. assign your values

3. create "fullMailingAddress" variable and assign

   the result of "street + country"

4. remember about the space

5. log "fullMailingAddress" in the console

## Numbers #3

1. create "score1", "score2", "score3" variables and

   assign values (0-100)

2. calculate total score and average score, and assign them to the variables.

3. log total score and average score

4. create "plates" variable and assign 20

5. create "people" variable and assign 7

6. calculate remaining plates and assign to the variable

7. add one to remaining plates

8. create message variable and display 'There are (your value goes here) plates available' - string concatenation

9. log message

## Arrays #4

1. create "fruits" array and store some fruit values

2. setup the last item as number (random)

3. assign first fruit to the variable

4. re-assign last array item to the actual fruit

5. log both first fruit variable and entire fruits array

## Functions #5

1. create "calculateTotal" function

2. add two parameters subTotal, tax

3. return sum of parameters

4. create 3 vars "order1","order2","order3"

5. call calculateResult, pass in some values and assign result to each order

6. log all three orders

7. refactor "calculateTotal" to function expression

## Objects #6

1. create car object

2. add make, model, year, colors (array),

   hybrid (boolean) keys

3. add two methods (drive and stop)

4. in the function body setup log with random text

5. log make

6. log first color

7. invoke both methods

## Conditional Statements #7

1. create two objects "person1", "person2"

2. setup name,age (15-25),

   status ('resident', 'tourist') keys

3. setup if else, condition where

   age must be bigger than 18 and status must be

   equal to 'resident'

4. test with both objects

## Strings #8

1. create function fullName

2. accept two parameters "firstName", "lastName"

3. add them together (concat) and return result in uppercase

4. invoke fullName and pass some values

5. log result

6. change the order of arguments

7. refactor to object parameter

## Array Methods #9

Multiple Videos

#### Create Students Array

1. setup students array with 5 students

   {

   id: 1,

   name: 'peter',

   score: 80,

   favoriteSubject: 'math',

   },

#### Use Multiple Files

- easer to manage code base (file, project)

- order matters

- other ways to achieve the same result (ES6 modules, fetch DB )

- not limited to just static data

#### updatedStudents

1. add role:'student' property to each object

   using MAP method

2. assign to 'updatedStudents' variable and log

#### highScores

1. filter array and return only scores >= 80

2. assign to 'highScores' variable and log

#### specificId

1. find specific id in array

2. assign to 'specificId' variable and log

#### averageScore

1. sum up all student.score values with reduce

2. divide by the length of the students array

3. assign to 'averageScore' and log

#### survey

1. list favorite subjects with reduce

   {

   english: 1

   history: 1

   math: 3

   }

2. assign to survey and log