React? ?? ??????? ???? ? ???? ?? ?? Javascript ????????. ??? React ???? ??? ? ?? ???? Javascript ??? ???? ?? ?????. ?? ????? React? ??? ?? ??? ?? ? ??? ??? ?? ??? ???? ?? ??? ??? ? ????.
? ???? ?? ???? React? ???? ?? ??? ? 15?? ?? ??? ?? ????. ? ??? ?? ?? ???? ???? ?????.
?? React? ????? ?????? ????? ?? ? ??? ??? ???.

15?? ?? JavaScript ??

1.?? ??
??? ??? ?? ?? ?? ? ??? ? ?? ??? ?? ????? ?? ?????.
?? ?? ? ??? ?? ?????.
??? ???? ?? ???? ?????? ???? ????? ??? API?? ??? ????? ??? ?? ?? ??? ????? ??? ??? ??? ??? ? ????.
?? ??? ??? ???? ??? ?? ??? ???? ?? ??? ??? ? ????.
?? ??? ??? ???? ???? ??? ???? ???? ??? ? ?? ?? ???? ??? ???? ? ?????.

?

// The callback function
function showText() {
  console.log('The written text should show after 2 seconds.');
}
 function showAfterDelay(callback, delay) {
  setTimeout(callback, delay);
}
showAfterDelay(showText, 2000);

2.??? ??
Arrow Functions? ES6?? ?????? ?? ??? ?? ???? ??? ? ?? ????. ??? ??? ??? ??? React?? ?? ?????.

?

const showText = () => {
  console.log('This written text should show after 2 seconds.');
};
const showAfterDelay = (callback, delay) => {
  setTimeout(callback, delay);
};
showAfterDelay(showText, 2000);

3.Array.Map() ???
?? ??? ???? ???? ??? ?? ??? ??? ? ???? React??? ????? ???? ????. ??? ??? ???? ?? ??? ?????. ??? ?? ???? ?? ??? ???? ?? ?? ???? ? ??? ?????.
??? ?? ??? ? ??? Array.map() ??????.
Array.map() ???? ?? ??? ???? ??? ??? ? ??? ?????. ?? ???? ??? ?? ?? ? ???? ??? ? ????.

?

Const BookNumbers = [1,2,3,4];
Const DoubleNumbers = BookNumbers.map((book)=> book *2);
Console.log(DoubleNumbers);
//Output BookNumbers= [2,4,6,8]

4.Array.Filter() ???
Array.filter() ???? ???? ???? ???? ?????. ??? ???? ???? true ?? false ??? ?? ??? ?? ??? ???? ? ????.
???? ???? ???? ?????, ??? ???? ??? ?? ??? ???? ? ??? ?? ??? ???.

?

// The callback function
function showText() {
  console.log('The written text should show after 2 seconds.');
}
 function showAfterDelay(callback, delay) {
  setTimeout(callback, delay);
}
showAfterDelay(showText, 2000);

5.Array.reduce() ???
???? ? ? ??? array.reduce() ???? ?? ??? ?? ??? ?????. ?? ??? ??? ????? ????? ?? ?? ?? ? ?????.

Reduce ??? 3?? ??? ???

• ?? ?(?? ??): ???? ?? ????. ???? ?? ?? ? ?? ?? ??? ????? ????, ? ?? ???? ??? ?????.
• ???(??):?? ???? ??? ?????.
• ?? ?(??): ?? ?? ?? ??

?

const showText = () => {
  console.log('This written text should show after 2 seconds.');
};
const showAfterDelay = (callback, delay) => {
  setTimeout(callback, delay);
};
showAfterDelay(showText, 2000);

6.??? ???
??? ???? ???? ???? Javascript ??? JavaScript ???? ??? ? ????.
??? ${}? ?? ?? ? ??? ???? JavaScript?? ???? ???? ??? ?? ??? ?????.

?

Const BookNumbers = [1,2,3,4];
Const DoubleNumbers = BookNumbers.map((book)=> book *2);
Console.log(DoubleNumbers);
//Output BookNumbers= [2,4,6,8]

7.?? ???
?? ???? if..else ?? ???? ???? ???? ??? ???? ?? ??????.
React??? if..else ?? React? ???? JSX?? ?? ??? ???? ?? ?? ???? ????.
JSX? Javascript, CSS ? React ?? ??? HTML? ??? ? ?? JavaScript? ?? ?????.
React ??? ?????? ????? ???? ??? ?? ??? ??? ??? ???.

?

Const BookNumbers = [1,2,3,4];
Const FilteredNumbers = BookNumbers.filter((book) => book % 2 !== 0 );
Console.log(FilteredNumbers);
// Output 1,3

8.?? ? ?? ???
?? ???? ?? ??? ?? ????? ???? ? ?????. JavaScript? ???? ?? ?? ???? ??? ????.

• AND- ? ????? ?? true? ???? true? ?????.
• OR- ?? ??? ????? true? ?? true? ?????.
• NOT- ????? ?? ?? ????? ???..

??? ?? ???? ??? ? ?? ????? ???? ??? ? ?? ??? ?? ???? ? ?? ????? ???? ?? ?? ????? ???? ?????.

??? ???? ??

???(&&)

• ? ?? ????? false?? ?? ???? false??? ? ?? ????? ???? ????.
• ? ?? ????? true?? ? ?? ????? ???? ??? ?? ?????.

??(||)

• ? ?? ????? true?? ?? ???? true??? ? ?? ????? ???? ????.
• ????? false? ?? ? ?? ????? ???? ??? ?? ?????.

// The callback function
function showText() {
  console.log('The written text should show after 2 seconds.');
}
 function showAfterDelay(callback, delay) {
  setTimeout(callback, delay);
}
showAfterDelay(showText, 2000);

9.RestSpread ???
?? ??? ? ??? ????? ?? ?? ??? ????? ?? ???? ???? ??? ??????.
? 3?? ??? ?? ??? (...)? ??? ?? ??? ???? ??? ?? ??? ?????. ??? ?? ??? ?????.

• ?? ??

const showText = () => {
  console.log('This written text should show after 2 seconds.');
};
const showAfterDelay = (callback, delay) => {
  setTimeout(callback, delay);
};
showAfterDelay(showText, 2000);

• ?? ??

Const BookNumbers = [1,2,3,4];
Const DoubleNumbers = BookNumbers.map((book)=> book *2);
Console.log(DoubleNumbers);
//Output BookNumbers= [2,4,6,8]

• ?? ??? ? ?? ??

Const BookNumbers = [1,2,3,4];
Const FilteredNumbers = BookNumbers.filter((book) => book % 2 !== 0 );
Console.log(FilteredNumbers);
// Output 1,3

• ??? ?? ??

const BookNumbers = [1, 2, 3, 4];
const NumberSum = BookNumbers.reduce((accumulator, currentValue) => accumulator + currentValue, 0);

console.log(sum); // Output: 15

??? ???(...)? ? 3?? ????? ??? ?? ???. ?? ??? ??/???? ?? ??? ???? ? ?????.

?

Const NameValue = "Ade";
const NumValue = 5;
const TempLit= `I am ${NameValue}, a ${NumValue} year old girl `

10.??? ??
??? ??? null ?? ???? ?? ?? ?? ?????. ?? ???? null??? ???? ?? ??? ???? ???? ?? ??? ????? ? ?????. ???? ???? ???? ?? ??? ??????. ?????? ??? ???? ??? ??? ?????.
?? ???? ??? ?? ?? ????? ??? ? ????. null ? ???? ?? ?? ???? ??? ??? ???? ??? ???.

const BookNumbers = 4;
const result = (BookNumbers % 2 === 0) ? "Even" : "Odd";
console.log(result); 
// Output: "Even"

11.?? ??
???? ?? ??? ??? ???? ?? ?? ??? ???? ? ????. ????? ?? ?? ??? ? ????.
?? ??? ???? ??? ?? ?? ??? ??? ? ????.
?? ??? ????

• ?? ????
• ??? ??
• ???? ?????.

React? ???? ?? ????? ??? ?? ??? Destructuring???.

const idVerify = true;
const displayMessage = idVerify && "Identified";

console.log(displayMessage); 
// Output: "Identified"

12.?? ?? ??
JavaScript?? ??? ??? ? ????. ?, ???? ??? ??, ?? ?? ????? ? ????.
??? React??? ?? ???? ???? React? ?? ??? ??? ? ??? ?? ?? ???? ???? ??? ????. React?? ?? ??? ????? ?, ??, ???? ???? ?? ???? ???? ?? ??? ???? ?? ??? ??? ??, ??, ?????? ?? ??????.

?

• ?? ??

// The callback function
function showText() {
  console.log('The written text should show after 2 seconds.');
}
 function showAfterDelay(callback, delay) {
  setTimeout(callback, delay);
}
showAfterDelay(showText, 2000);

• ??? ?????

const showText = () => {
  console.log('This written text should show after 2 seconds.');
};
const showAfterDelay = (callback, delay) => {
  setTimeout(callback, delay);
};
showAfterDelay(showText, 2000);

• ??? ???????

Const BookNumbers = [1,2,3,4];
Const DoubleNumbers = BookNumbers.map((book)=> book *2);
Console.log(DoubleNumbers);
//Output BookNumbers= [2,4,6,8]

13.???/?? ??
??? JavaScript? ???? ? ??? ??? ??? ???? ??? ?????. JavaScript? ??? ?????. ?, ?? ????? ??? ??? ?????.
???????? ???? ???? ?? ????? ???? ?? ?? ??? ???? ? ?? ????.
??? ??? ???? ??? ??? ??? ???? ?? ??? ??? ? ???? ??? ??? ???? ??? ?????.
React??? ?????? ????? ?????(API)? ?? ???? ??? ? ??? ??? ????? ???? ?? ?????.

?

Const BookNumbers = [1,2,3,4];
Const FilteredNumbers = BookNumbers.filter((book) => book % 2 !== 0 );
Console.log(FilteredNumbers);
// Output 1,3

14.??
Promise? ??? ??? ?? ?? ?? ??? ???? ?? ??? ?????.
??? ? ?? ?? ? ??? ?????:

• ?? ?: ??? ??? ?? ?? ?????.
• ???: ??? ????? ???????
• ???: ??? ??? ??????.

Promise? JavaScript?? ??? ??? ?? ??? ??? ? ??? ?????. ?? ??? ??? ???? ??? ????? ???? ???? ??? ???? ? ????.

15.try.catch.finally? ???? ?? ??
???? ???? ?? ??? ???? ??? ??? ??? ???? ??? ???? ??? ??? ????.
???? ???? ??? ????? ?? ???? ???? ?????.
Try..catch..finally ??? ???? ??? ????? ???? ?? ?? ??? ???? ?? ??? ????? ?? JavaScript? ??? ?? ?? ?????.
???? ?? ??? ?? ? ??? ?? ?? ? ????. ? ??? ???? ?????.

• Try- ??? ??? ? ?? ??? ?????.
• Catch - try ?? ??? ??? ???? ?????. ?? ??? ??? ????.
• ????? - ?? ?? ??? ???? ?????.

?

const BookNumbers = [1, 2, 3, 4];
const NumberSum = BookNumbers.reduce((accumulator, currentValue) => accumulator + currentValue, 0);

console.log(sum); // Output: 15

??

?? ??? ?? JavaScript ??? ?? ???? ??? ?? ??? ???? ??? React ???? ? ? ????. ?? ??? ??? ??? ???? ???? ?????. ?? ???? ????? ???? ??? ???!

? ??? React? ???? ?? ??? ? ?? JavaScript ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!