Which of the following is not a type assertion in TypeScript?A. let myVar = <string>someValue;B. let myVar = someValue as string;C. let myVar: string = someValue;D. let myVar = (string)someValue;
Question
Which of the following is not a type assertion in TypeScript?A. let myVar = <string>someValue;B. let myVar = someValue as string;C. let myVar: string = someValue;D. let myVar = (string)someValue;
Solution
The option D. let myVar = (string)someValue; is not a type assertion in TypeScript. In TypeScript, type assertions are ways to tell the compiler “trust me, I know what I’m doing.” and it has two forms. One is the “angle-bracket” syntax and the other is the "as" syntax. So, options A, B and C are valid type assertions in TypeScript.
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