Tim

console.log(
  myArray[
    Math.floor( Math.random() * myArray.length )
  ]
);

document.querySelector(".box").addEventListener("click", function(e) {
	e.target.classList.toggle("red");
})

function upper(obj) {
  return Object.keys(obj).map(key => key.toUpperCase())
}

<?php
return [
    'support' => [
        'class' => 'yii\swiftmailer\Mailer',
        'useFileTransport' => false,
        'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'mailmail.ru',
            'username' => 'support@mail.ru',
            'password' => 'c',
            'port' => '465',
            'encryption' => 'ssl',
        ],
    ],
    'noReply' => [
        'class' => 'yii\swiftmailer\Mailer',
        'useFileTransport' => false,
        'transport' => [
            'class' => 'Swift_SmtpTransport',
            'host' => 'mail.mail.ru',
            'username' => 'noreply@mail.ru',
            'password' => '',
            'port' => '465',
            'encryption' => 'ssl',
        ],
    ],
];

$mailers = require __DIR__ . '/../components/mailer/config.php';
'components'=> [
    ...
    'supportMailer' => $mailers['support'],
    'noreplyMailer' => $mailers['noReply'],
    ...
]

Yii::$app=>supportMailer ...
Yii::$app=>noreplyMailer...

const count = str => [...str]
  .reduce((acc, n, i, a) => (
    a[i - 1] !== n && acc.push([ n, 0 ]),
    acc[acc.length - 1][1]++,
    acc
  ), [])
  .flat()
  .join('');

const count = str => str.replace(/(.)\1*/g, m => m[0] + m.length);

for(let item of $('.col')){
        console.log(item);
    }

str.split(' ').map(n => +n)

// или

str.split(/[^\d\-]/).map(n => n - 0)

// или

str.match(/-?\d+/g)?.map(Number) ?? []

// или

Array.from(str.matchAll(/\S+/g), parseFloat)

// или

JSON.parse(`[${str.replaceAll(' ', ',')}]`)

$('.link').parents('li').children('a').css('color', '#f00');

const elements = document.querySelectorAll('div[data-atr]')
elements.forEach(elem => elem.style = elem.dataset.atr);

Object.values(arr.reduce((acc, [ user, ...data ]) => {
  (acc[user] = acc[user] ?? { user, data: [] }).data.push(data);
  return acc;
}, {}))

const getMaxIndexes = (arr, count) => Object
  .entries(arr.reduce((acc, n, i) => ((acc[n] = acc[n] ?? []).push(i), acc), {}))
  .sort((a, b) => b[0] - a[0])
  .flatMap(n => n[1])
  .slice(0, count);