JavaScript Easy technical 1 views 1 min read

What are the different kinds of generators?

Peer-reviewed by HireXTech Technical Panel Updated for 2025/2026 hiring Editorial standards
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Interviewer Expectations for this Question
01
Core Competency

Assesses fundamental understanding of JavaScript conventions, runtime behavior, and memory/performance considerations.

02
Evaluation Criteria

Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.

Comprehensive Model Answer Verified Solution

There are five kinds of generators,

  1. Generator function declaration:
        function* myGenFunc() {
          yield 1;
          yield 2;
          yield 3;
        }
        const genObj = myGenFunc();
        
  1. Generator function expressions:
        const myGenFunc = function* () {
          yield 1;
          yield 2;
          yield 3;
        };
        const genObj = myGenFunc();
        
  1. Generator method definitions in object literals:
        const myObj = {
          *myGeneratorMethod() {
            yield 1;
            yield 2;
            yield 3;
          },
        };
        const genObj = myObj.myGeneratorMethod();
        
  1. Generator method definitions in class:
        class MyClass {
          *myGeneratorMethod() {
            yield 1;
            yield 2;
            yield 3;
          }
        }
        const myObject = new MyClass();
        const genObj = myObject.myGeneratorMethod();
        
  1. Generator as a computed property:
        const SomeObj = {
          *[Symbol.iterator]() {
            yield 1;
            yield 2;
            yield 3;
          },
        };

        console.log(Array.from(SomeObj)); // [ 1, 2, 3 ]
        

Candidate Response Strategy & Interview Tips

  1. Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
  2. Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
  3. Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
  4. Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.
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