Bracket Notation & Dynamic Keys

Bracket notation provides flexible property access, especially when property names are dynamic or contain special characters.

Basic Bracket Notation

Dynamic Property Access

The real power: use variables as keys:

Special Property Names

Bracket notation handles names that dot notation cannot:

Building Dynamic Queries

Combining Notations

Exercise: Dynamic Access

Exercise: Special Characters

Exercise: Loop Through Keys

Key Points

• Bracket notation: object["property"]
• Required for special characters, spaces, numbers
• Enables dynamic access with variables
• Mix with dot notation as needed
• Essential for iterating over unknown keys