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🚀 Better code, one Short at a time.

Fast, practical lessons on JavaScript, clean code, common mistakes, modern patterns, and better ways to solve everyday coding problems.

No endless theory. Just real code and ideas you can use immediately.

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Shorts

Why map With parseInt Returns NaN | JavaScript Classic

74 views

Math.max of an Empty Array Is Negative Infinity | JavaScript

76 views

These JavaScript Values Are Truthy and It Will Bite You

16 views

One Bad JSON.parse Crashes Your Whole App | JavaScript

77 views

Optional Chaining Is Not as Safe as You Think | JavaScript

88 views

Your async map Returns Promises, Not Data | JavaScript

104 views

Why This Loop Prints 5 Five Times | JavaScript Closures

178 views

Why This Date String Is One Day Off | JavaScript

56 views

The Only JavaScript Value Not Equal to Itself

41 views

Why 0.1 + 0.2 Is Not 0.3 in JavaScript

42 views

This Array Has Length 5 and Zero Items | JavaScript

69 views

Array.fill Gives You One Shared Object | JavaScript Bug

28 views

Why Your Spread Copy Is Not Really a Copy | JavaScript

78 views

Never Use for...in on an Array | JavaScript Bug

30 views

Why replace Only Replaces the First Match | JavaScript

619 views

Stop Using || for Default Values | JavaScript Bug

307 views

This reduce() Crashes on Empty Arrays | JavaScript Bug

73 views

Your try/catch Is Not Catching That Error | JavaScript Async

671 views

Stop Deep Cloning With JSON.parse | Use structuredClone()

513 views

Your .map() Returns undefined | JavaScript Mistake

820 views