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JavaScript: Best Practices for Data

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Overview

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Learn best practices for keeping your JavaScript application’s data and data structures clean, uncluttered, and efficient.

Syllabus

Introduction
  • Working effectively with JavaScript data
  • What you should know
  • Setting up your environment
1. Why Best Practices?
  • Understanding style guides
  • Using modern deployment tools
  • Understanding ESLint
  • Foundational practice: Always use strict mode
2. Declaring Variables
  • Prefer const, then let
  • Use individual statements to create variables
  • Create descriptive variable names
  • Standardize acronym case
  • Remove unused variables
  • Challenge: Declare variables
  • Solution: Declare variables
3. Assigning Values
  • Don't assign variables in chains
  • Standardize quotes
  • Create arrays and objects using literals
  • Quote object property names consistently
  • Challenge: Assign values
  • Solution: Assign values
4. Type Casting
  • Type cast strings with the String wrapper
  • Type cast numbers with the Number wrapper
  • Type cast Booleans using double negation
  • Rely on implicit Boolean values in conditionals
  • Challenge: Type cast
  • Solution: Type cast
5. Comparing Values
  • Use triple-character equality operators
  • Don't use Yoda conditions
  • Compare appropriately for the data type
  • Use ternary statements judiciously
  • Add parentheses to clarify logic
  • Challenge: Compare values
  • Solution: Compare values
Conclusion
  • Next steps

Taught by

Sasha Vodnik

Reviews

4.8 rating at LinkedIn Learning based on 83 ratings

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