Table of Contents
TypeScript Best Practices
JavaScript Best Practices
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2.11 Summary
- We should use === in places of == to ensure proper checks.
- We shouldn’t ignore the type inference capabilities
3.11 Summary
- Leverage readonly when it makes sense to prevent property mutation that is to ensure that once a property is initialized, it can't be changed. It helps in preventing accidental mutation of properties and enforces immutability.
- Use safe guards instead of type assertions (as). Implement type guards where possible to provide clearer, safer code.
- When needed, use explicit annotations to prevent type widening and ensure your variables always have the expected type, because TypeScript automatically widens types in certain situations, which can lead to unwanted behavior.
- Maintain consistent property ordering in object literals and interfaces. Name properties consistently across the classes, types and interfaces for improved readability
4.11 Summary
- Always specify return types for functions to ensure proper type checking and prevent unexpected behavior.
- Use optional and rest parameters judiciously, considering their impact on function behavior and readability. Always put optional parameters after the required parameters in the function signature calls. And put rest parameters last.
- Always specify the return type of a function to ensure type safety and provide clear expectations to callers.
- Leverage utility types like Parameters, ReturnType, and ThisParameterType to enhance type safety and improve code quality in functions.
- Use arrow functions or explicit binding to maintain the desired this context. Always set the shape/type of this. Understand the differences between bind, call, apply, and strictBindCallApply for manipulating the this context.
- Use globalThis instead of environment-specific global objects (window, global, etc.) for better portability.
- Utilize utility types like Parameters, ReturnType, and ThisParameterType to improve code quality and correctness.
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