Summary of the article: "JavaScript Logical OR vs. Nullish Coalescing Operator"

The article explains the differences between the Logical OR (||) operator and the Nullish Coalescing (??) operator in JavaScript:

- 🔍 Logical OR (||) Operator
- Used to return the first "truthy" value.
- Can behave unexpectedly with values like 0, '', or false.

- 🔍 Nullish Coalescing (??) Operator
- Returns the first value that is not null or undefined.
- Ideal for cases where 0, '', or false are valid values.

- 🔧 Examples
- let result = userInput || 'default';
- let result = userInput ?? 'default';

- 🌟 Conclusion
- Logical OR (||) is useful when falsy values need to be replaced.
- Nullish Coalescing (??) is preferable when only null and undefined should be considered as "absent" values.

Additional Tips:
- Performance: Both operations are quick in execution.
- Compatibility: Check for ?? support in older environments.

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Summary of the article: "JavaScript Logical OR vs. Nullish Coalescing Operator"

The article explains the differences between the Logical OR (||) operator and the Nullish Coalescing (??) operator in JavaScript:

- 🔍 Logical OR (||) Operator
- Used to return the first "truthy" value.
- Can behave unexpectedly with values like 0, '', or false.

- 🔍 Nullish Coalescing (??) Operator
- Returns the first value that is not null or undefined.
- Ideal for cases where 0, '', or false are valid values.

- 🔧 Examples
- let result = userInput || 'default';
- let result = userInput ?? 'default';

- 🌟 Conclusion
- Logical OR (||) is useful when falsy values need to be replaced.
- Nullish Coalescing (??) is preferable when only null and undefined should be considered as "absent" values.

Additional Tips:
- Performance: Both operations are quick in execution.
- Compatibility: Check for ?? support in older environments.

Medium

?? vs || in JavaScript: The little-known difference

Learn it once and for all and avoid painful bugs down the line.

hottg.com/wwwdev/4468

585 viewsJun 23, 2024 at 21:17