Classes in TypeScript
Static Members
Define class-level properties and static block initializers.
Last Updated: July 29, 2026
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10 min read
Static members belong to the class constructor itself rather than instances of the class.
1. Introduction & Architecture
2. Deep Dive & Core Concepts
ES2022 static initialization blocks (static { ... }) allow complex static field setup.
3. Basic Code Example
4. Advanced Production Patterns
5. Interactive Code Playground
class MathUtils { static square(n: number) { return n * n; } }
console.log(MathUtils.square(4));6. Common Pitfalls & Edge Cases
Note: Static members cannot be accessed via instance reference
this inside regular instance methods. Use ClassName.member instead.7. Interview Q&A & Quizzes
Q: What is the scope of a static class property?
A: Static properties are attached to the constructor function itself and shared across all instances.
8. Summary Comparison Table
| Member Type | Access Pattern | Scope |
|---|---|---|
| Instance Member | this.prop | Unique per object instance |
ClassName.prop | Shared globally on class constructor |