The proposal "Numeric Separators" allows underscores as separators in numeric literals, and it's a part of ES12.

Numeric separators allow using big numbers more transparently.

Underscore in numbers is called a numeric separator. It allows to use big numbers efficiently in javascript

Numeric separator

HTML allows creating a date picker out of the box! You don't need to import any other library to have a date picker. Just use 

It might look different on different browsers and OS. Internet Explorer does not support the native HTML date picker.

You might not need another library to solve your problem. If you need a date picker, choose HTML Native date picker. It is supported by all major browser

Native date picker

Variables in programming should be named to achieve one goal: to explain what it does and why it exists. Variables with good naming save time for all people because you already know what this variable stands for.

Meaningful and easy to pronounce variable names are much better than random names. It helps other developers to read your code without any problems

Numeric separator

See more tips!

Better variable names

Native date picker

Hello, I'm a frontend developer with over eight years of experience, freelancer. I'm also a mentor for junior frontend developers. I wrote a book for Junior Frontend developers called Frontend Unicorn.