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Test your JavaScript skills Series' Articles

Back to Coderslang: Become a Software Engineer's Series
JS Test #1: Type conversion in JavaScript

JS Test #1: Type conversion in JavaScript

Reactions 145 Comments 2
1 min read
JS Test #2: How to create an array in JavaScript

JS Test #2: How to create an array in JavaScript

Reactions 32 Comments 2
1 min read
JS Test #3: Adding strings to numbers and booleans

JS Test #3: Adding strings to numbers and booleans

Reactions 26 Comments
1 min read
JS Test #4: try/catch

JS Test #4: try/catch

Reactions 24 Comments
1 min read
JS Test #5: Can you use an arrow function as a getter?

JS Test #5: Can you use an arrow function as a getter?

Reactions 18 Comments
1 min read
JS Test #6: Variable number of arguments

JS Test #6: Variable number of arguments

Reactions 13 Comments
1 min read
JS Test #7: Is this an array?

JS Test #7: Is this an array?

Reactions 13 Comments 3
1 min read
JS Test #8: Zero timeout

JS Test #8: Zero timeout

Reactions 8 Comments
1 min read
JS Test #9: Promise.reject + try/catch

JS Test #9: Promise.reject + try/catch

Reactions 13 Comments 1
1 min read
JS Test #11: Scope

JS Test #11: Scope

Reactions 12 Comments
1 min read
JS Test #10: null + undefined

JS Test #10: null + undefined

Reactions 13 Comments 1
1 min read
JS Test #12: Math.min()

JS Test #12: Math.min()

Reactions 9 Comments
1 min read
JavaScript Interview #13: Big numbers

JavaScript Interview #13: Big numbers

Reactions 13 Comments 3
1 min read
JavaScript Interview Question #14: 0.1 + 0.2 = ?

JavaScript Interview Question #14: 0.1 + 0.2 = ?

Reactions 40 Comments 4
1 min read
JavaScript Interview Question #15: Getter function

JavaScript Interview Question #15: Getter function

Reactions 29 Comments 2
1 min read
JavaScript Interview Question #16: typeof NaN

JavaScript Interview Question #16: typeof NaN

Reactions 16 Comments
1 min read
JavaScript Interview Question #17: Sum of Two Empty Arrays

JavaScript Interview Question #17: Sum of Two Empty Arrays

Reactions 66 Comments 16
1 min read
JavaScript Interview Question #18: What's the sum of two booleans in JavaScript?

JavaScript Interview Question #18: What's the sum of two booleans in JavaScript?

Reactions 46 Comments 8
1 min read
JavaScript Interview Question #19: Catching the rejected Promise

JavaScript Interview Question #19: Catching the rejected Promise

Reactions 25 Comments 2
1 min read
JavaScript Interview Question #20: Can you sum arrays with objects in JS?

JavaScript Interview Question #20: Can you sum arrays with objects in JS?

Reactions 20 Comments
1 min read
JavaScript Interview Question #21: ISO Date

JavaScript Interview Question #21: ISO Date

Reactions 16 Comments
1 min read
JavaScript Interview Question #22: How `toString` works in JavaScript?

JavaScript Interview Question #22: How `toString` works in JavaScript?

Reactions 23 Comments
1 min read
JavaScript Interview Question #23: Array.splice

JavaScript Interview Question #23: Array.splice

Reactions 24 Comments 2
2 min read
JavaScript Interview Question #24: Adding new properties to JS strings

JavaScript Interview Question #24: Adding new properties to JS strings

Reactions 13 Comments 2
1 min read
JavaScript Interview Question #25: Immediate Promise.resolve

JavaScript Interview Question #25: Immediate Promise.resolve

Reactions 30 Comments
1 min read
JavaScript Interview Question #26: Are these dates equal?

JavaScript Interview Question #26: Are these dates equal?

Reactions 20 Comments
1 min read
JavaScript Interview Question #27: Handling errors in JavaScript Promise chains

JavaScript Interview Question #27: Handling errors in JavaScript Promise chains

Reactions 28 Comments 4
1 min read
JavaScript Interview Question #28: Resolve and reject at the same time

JavaScript Interview Question #28: Resolve and reject at the same time

Reactions 25 Comments 2
1 min read
JavaScript Interview Question #29: Slice and dice

JavaScript Interview Question #29: Slice and dice

Reactions 28 Comments
1 min read
JavaScript Interview Question #30: Reject inside resolve

JavaScript Interview Question #30: Reject inside resolve

Reactions 11 Comments
1 min read
JavaScript Interview Question #31: Big or small

JavaScript Interview Question #31: Big or small

Reactions 30 Comments 2
1 min read
JavaScript Interview Question #32: 0.1 + 0.1 + 0.1 === 0.3

JavaScript Interview Question #32: 0.1 + 0.1 + 0.1 === 0.3

Reactions 53 Comments 4
1 min read
JavaScript Interview Question #33: Add two empty arrays and check the type

JavaScript Interview Question #33: Add two empty arrays and check the type

Reactions 45 Comments 6
1 min read
JavaScript Interview Question #34: Different ways to get the current date in JS

JavaScript Interview Question #34: Different ways to get the current date in JS

Reactions 30 Comments
1 min read
JavaScript Interview Question #35: What is faster, zero timeout, or immediate resolve?

JavaScript Interview Question #35: What is faster, zero timeout, or immediate resolve?

Reactions 50 Comments 5
1 min read
JavaScript Interview Question #36: Can you add a new property to the JS array?

JavaScript Interview Question #36: Can you add a new property to the JS array?

Reactions 30 Comments 3
1 min read
JavaScript Interview Question #37: What's the type of a single argument provided to the split function?

JavaScript Interview Question #37: What's the type of a single argument provided to the split function?

Reactions 29 Comments
1 min read
JavaScript Interview Question #38: Can you add multiple arrays in JavaScript?

JavaScript Interview Question #38: Can you add multiple arrays in JavaScript?

Reactions 42 Comments 8
1 min read
JavaScript Interview Question #39: How does setTimeout work inside the loop?

JavaScript Interview Question #39: How does setTimeout work inside the loop?

Reactions 45 Comments 3
1 min read
JavaScript Interview Question #40: What is the type of `undefined` in JS?

JavaScript Interview Question #40: What is the type of `undefined` in JS?

Reactions 29 Comments 5
1 min read
JavaScript Interview Question #41: Going above MAX_SAFE_INTEGER

JavaScript Interview Question #41: Going above MAX_SAFE_INTEGER

Reactions 16 Comments
1 min read
JavaScript Interview Question #42: How Math.max works in JS

JavaScript Interview Question #42: How Math.max works in JS

Reactions 22 Comments
1 min read
JavaScript Interview Question #43: Object.toString vs Array.toString

JavaScript Interview Question #43: Object.toString vs Array.toString

Reactions 13 Comments 4
1 min read
JavaScript Interview Question #44: Number vs BigInt in JS

JavaScript Interview Question #44: Number vs BigInt in JS

Reactions 17 Comments 2
1 min read
JavaScript Interview Question #45: Сurrency formatting in JS

JavaScript Interview Question #45: Сurrency formatting in JS

Reactions 51 Comments
1 min read
JavaScript Interview Question #46: Length of JS functions

JavaScript Interview Question #46: Length of JS functions

Reactions 65 Comments 10
1 min read
JavaScript Interview Question #47: How Object.setPrototypeOf works in JS

JavaScript Interview Question #47: How Object.setPrototypeOf works in JS

Reactions 13 Comments
2 min read
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