15 the most common JavaScript mistakes in 2023 (+ solutions)

In this video, I'm going to show you 15 js mistakes that I see too often when I'm doing a code review. Regardless of whether we're talking about junior, middle, or senior developers, I see these bugs everywhere. Learn how to write javascript code in a proper way.

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TOP 7 the Most Commonly Used JavaScript Function You Have to Know:

0:45 1. Variable scope
3:15 2. Comparing floats
9:50 3. Using array with named index
10:59 4. Handling NaN
12:53 5. Using a variable as key in objects
15:09 7. Object destructuring
16:37 8. String concatenation
17:46 9. Spread syntax
19:00 10. Confusions about equality
19:57 11. Misusing the Addition Operator for Merging Arrays
21:22 12. Using Equality Operators Incorrectly
22:30 13. Missing parameters in function calls
24:10 14. Array Iterations With ‘for-in’ Loops
25:30 15. Not using "strict mode"

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[Mdbootstrap]

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[archiem]

David is the man!!
Love your accent.😃

[hache_raw]

I love how "2" + "2" is "22" and "22" - 2 is 20 😂

[hache_raw]

And then, there is Internet Explorer... No template literals, no spread syntax and no default parameter value in functions... And sadly somethimes you have to support it...

[ukyoize]

Most common JS mistake is using it in the first place.