TypeScript Questions et reponses d'entretien
Differences associees
Question 21. What are type guards in TypeScript?
Type guards are expressions that help TypeScript narrow down the type of a variable within a certain code block.
Question 22. How do you declare and use a class in TypeScript?
Classes in TypeScript are declared using the 'class' keyword, and objects are created using the 'new' keyword.
Question 23. What is the 'for...of' loop in TypeScript?
The 'for...of' loop in TypeScript is used to iterate over the values of an iterable object, such as an array or a string.
Question 24. What is the 'keyof' operator in TypeScript?
The 'keyof' operator in TypeScript is used to obtain the union type of all possible keys of an object type.
Question 25. How do you use the 'import' statement in TypeScript?
The 'import' statement in TypeScript is used to import modules or exports from other files.
Les plus utiles selon les utilisateurs :
- What is TypeScript?
- Explain the difference between 'let' and 'const' in TypeScript.
- What are the basic data types in TypeScript?
- How do you define an interface in TypeScript?
- What is the 'any' type in TypeScript?