Add local net server

net use X: \\computername\path

html tag sample list

<a>link</a>

link

<b>bold</b>

bold

<em>em</em>

em

Useful sample of js | 役立つJSサンプル

Get longest string length in array | 配列に一番長い文字の長さを取得

Math.max(...(array.map(el => el.name.length)))

ei: const lengthNameColumn = Math.max(...(array.map(el => el.name.length))) * 10;

8digs number to date format | 8桁数字から日付フォーマットに

'20230901'.replace(/(\d{4})(\d{2})(\d{2})/g, '$1/$2/$3');

'20230901'.replace(/(\d{4})(\d{2})(\d{2})/g, '$1-$2-$3');

merge two array by key | キーで二つ配列のマージ

data1.forEach(item => map.set(item.key, item));

data2.forEach(item => map.set(item.key, { ...map.get(item.key), ... item }));

Add event listen to window focus in and out

var blurFuc = function() {

    console.log(focus out)
}

var focusFuc = function() {

    console.log(focus in)
}

window.addEventListener('blur', blurFunc);

window.addEventListener('focus', focusFunc);

Convert an Object to an Array in JavaScript

const arr = {

    first: '1',

    second: '2'

};

 

Object.keys(arr)

• [ 'first', ' second' ]

 

Object.values(arr)

• [ '1', ' 2' ]

 

Object.entries(arr)

• [ [ 'first', '1' ], [ ' second ', '2' ] ]