👉 Part 2 -> 🔥Handy Copy-Paste Javascript Snippets Part 2 👉 Part 3 -> 🔥Handy Copy-Paste Javascript Snippets Part 3

Shuffle an Array

Shuffling an array is super easy with sort and random methods.

js
const shuffleArray = (arr) => arr.sort(() => 0.5 - Math.random());
console.log(shuffleArray([1, 2, 3, 4]));
// Result: [ 1, 4, 3, 2 ]

Check if Date is Valid

Use the following snippet to check if a given date is valid or not.

js
const isDateValid = (...val) => !Number.isNaN(new Date(...val).valueOf());
isDateValid("December 17, 1995 03:24:00");
// Result: true

Copy to Clipboard

Easily copy any text to clipboard using navigator.clipboard.writeText.

js
const copyToClipboard = (text) => navigator.clipboard.writeText(text);
copyToClipboard("Hello World");

Find the day of the year

Find which is the day by a given date.

js
const dayOfYear = (date) =>
  Math.floor((date - new Date(date.getFullYear(), 0, 0)) / 1000 / 60 / 60 / 24);
dayOfYear(new Date());
// Result: 272

Capitalize a String

Javascript doesn’t have an inbuilt capitalize function, so we can use the following code for this purpose.

js
const capitalize = str => str.charAt(0).toUpperCase() + str.slice(1)capitalize("follow for more")
// Result: Follow for more

Find the number of days between two days

Find the days between 2 given days using the following snippet.

js
const dayDif = (date1, date2) => Math.ceil(Math.abs(date1.getTime() - date2.getTime()) / 86400000)dayDif(new Date("2020-10-21"), new Date("2021-10-22"))
// Result: 366

Clear All Cookies

You can easily clear all cookies stored on a web page by accessing the cookie using document.cookie and clearing it.

js
const clearCookies = document.cookie.split(';').forEach(cookie => document.cookie = cookie.replace(/^ +/, '').replace(/=.\*/, \`=;expires=${new Date(0).toUTCString()};path=/\`));

Generate Random Hex

You can generate random hex colors with Math.random and padEnd properties.

js
const randomHex = () => \`#${Math.floor(Math.random() \* 0xffffff).toString(16).padEnd(6, "0")}\`;console.log(randomHex());
// Result: #92b008

Remove Duplicated from Array

You can easily remove duplicates with Set in JavaScript. It's a lifesaver.

js
const removeDuplicates = (arr) => [...new Set(arr)];
console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));
// Result: [ 1, 2, 3, 4, 5, 6 ]

Get Query Params from URL

You can easily retrieve query params from a URL either bypassing window.location or the raw URL goole.com?search=easy&page=3

js
const getParameters = (URL) => {
  URL = JSON.parse(
    '{"' +
      decodeURI(URL.split("?")[1])
        .replace(/"/g, '\\\\"')
        .replace(/&/g, '","')
        .replace(/=/g, '":"') +
      '"}'
  );
  return JSON.stringify(URL);
};
getParameters(window.location);
// Result: { search : "easy", page : 3 }

Log Time from Date

We can log time, in the format hour::minutes::seconds from a given date.

js
const timeFromDate = (date) => date.toTimeString().slice(0, 8);
console.log(timeFromDate(new Date(2021, 0, 10, 17, 30, 0)));
// Result: "17:30:00"

Check if a number is even or odd

js
const isEven = (num) => num % 2 === 0;
console.log(isEven(2));
// Result: True

Find Average of Numbers

Find the average between multiple numbers using reducemethod.

js
const average = (...args) => args.reduce((a, b) => a + b) / args.length;
average(1, 2, 3, 4);
// Result: 2.5

Check if the array is empty

A simple one-liner to check if an array is empty, will return trueor false.

js
const isNotEmpty = (arr) => Array.isArray(arr) && arr.length > 0;
isNotEmpty([1, 2, 3]);
// Result: true

Get Selected Text

Get the text the user has selected using inbuilt getSelectionproperty.

js
const getSelectedText = () => window.getSelection().toString();
getSelectedText();

Conclusion

Don’t forget to clap 👏 in the comment section below if you learned something new