Default operator in JavaScript

The Ultimate Guide to Default Values in JavaScript - PhillCode

The logical OR ( || ) operator is used to provide a default value when a variable is falsy. The falsy values in JavaScript are false, 0, '' (empty string), ...

Default operator in JavaScript, and real life examples - zzz.buzz

Default operator in JavaScript, and real life examples ... JavaScript has an operator called the default operator. Never heard of this? Basically, ...

Default parameters - JavaScript - MDN Web Docs

In JavaScript, function parameters default to undefined . However, it's often useful to set a different default value. This is where default ...

Guard and Default Operators of JavaScript - seanmonstar

Here's a quick look at how you can guard a value: var getUsername = function() { return loggedIn && username;} If the user hasn't logged in yet, loggedIn will ...

3 Ways to Set Default Value in JavaScript | SamanthaMing.com

let isHappyHour = ' '; // Logical Operator isHappyHour = isHappyHour || ' '; // ' ' // Ternary isHappyHour = isHappyHour ? · if (a || b) { // do something }.

Assigning a default value through the logical operator OR

Otherwise, it produces the value of the second operand. So in this example: