Technology Quote by Cody Lindley
““Function expressions and variables declared inside a function without using var become global properties.””
About This Quote
Declaring variables inside a function without using a declaration keyword (var/let/const) unintentionally creates global properties, polluting the global scope.
In simple terms: Undeclared locals become globals.
Key Takeaway
Implicit globals cause scope leakage.
Themes
programming
scope
JavaScript
best practices
Mood
technical
cautionary
Type
instructional
technical
When to use this quote
- large codebases
- team projects
- library development
Key Concepts
namespace pollution
Practical Applications
- always use let/const
- lint rules to catch globals
Questions to Reflect On
- Why do developers overlook declarations?
- What tools help enforce proper scoping?
A Different Perspective
In some legacy scripts, intentional globals may be used for quick prototyping.
