Regex in JavaScript

let regex = /apples/gi;
let text = 'Here are apples and apPleS';
// Output: Here are mangoes and mangoes
let result = text.replaceAll(regex, "mangoes");
console.log(result);

let text = 'Do you like aPPles?';
let regex = /apples/i

// Output: Do you like mangoes?
let result = text.replace(regex, 'mangoes');
console.log(result);

let regex = /t(e)(st(\d?))/g;
let text = 'test1test2';
let array = [...text.matchAll(regex)];
// Output: ["test1", "e", "st1", "1"]
console.log(array[0]);
// Output: ["test2", "e", "st2", "2"]
console.log(array[1]);

let text = 'This 593 string will be brok294en at places where d1gits are.';
let regex = /\d+/g

// Output: [ "This ", " string will be brok", "en at places where d", "gits are." ] 
console.log(text.split(regex))

let text = 'Here are apples and apPleS';
let regex = /apples/gi;

// Output: [ "apples", "apPleS" ]
console.log(text.match(regex));

let text = 'Do you like apples?';
let regex= /apples/;

// Output: apples
console.log(regex.exec(text)[0]);

// Output: Do you like apples?
console.log(regex.exec(text).input);

let text = 'I like APPles very much';
let regexA = /apples/;
let regexB = /apples/i;

// Output: -1
console.log(text.search(regexA));

// Output: 7
console.log(text.search(regexB));

let textA = 'I like APPles very much';
let textB = 'I like APPles';
let regex = /apples$/i

// Output: false
console.log(regex.test(textA));

// Output: true
console.log(regex.test(textB));