#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/operators-expressions/short-circuit-for-defaults

░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░████████████████████████████████████████████████████████████████████████████████████████

#####   ######  #####    ###    #   #  ###  #   #  ######
##  ##  ##      ##  ##  ## ##   #   #   #   #   #  ##
#####   ####    #####   #   #   #   #   #   #   #  ####
##  #   ##      ##      ## ##    # #    #    # #   ##
##   #  ######  ##       ###      #    ###    #    ######

$ curl repovive.com/roadmaps/javascript/operators-expressions/short-circuit-for-defaults

Repovive

Short-Circuit for Defaults - Operators & Expressions | JavaScript | Repovive

Repovive.

JavaScript22 sections · 783 units18h total

Open in Course

Short-Circuit for Defaults

Common pattern

Short-circuit || provides default values:

let name = userInput || "Guest"
// If userInput is falsy, use "Guest"

Short-circuit && guards against errors:

let user = null
user && console.log(user.name)
// Only accesses .name if user exists

These patterns are common in JavaScript. You'll see them often in code reviews and open-source projects.