Symbol.toPrimitive Changes Object Math?!
This object LIES about its value! Symbol.toPrimitive lets objects control how they convert to numbers/strings. When you add 5, JavaScript asks the object what it wants to be. The result will SHOCK you!
#javascript #javascripttricks #symbol.toprimitive #typecoercion #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #objectcoercion #javascriptbugs #advancedjavascript
Closure in Loop Prints SAME Value?!
Closures CAPTURE variables by reference! All setTimeout callbacks share the SAME i variable. They all print 3, not 0, 1, 2! This is the classic closure trap!
#javascript #javascripttricks #closures #loops #settimeout #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #asyncclosures #advancedjavascript
Symbol.toPrimitive Changes Object Math?!
This object LIES about its value! Symbol.toPrimitive lets objects control how they convert to numbers/strings. When you add 5, JavaScript asks the object what it wants to be. The result will SHOCK you!
#javascript #javascripttricks #symbol.toprimitive #typecoercion #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #objectcoercion #javascriptbugs #advancedjavascript
Proxy has Trap HIDES Properties?!
Proxy can LIE about properties! The has trap controls the 'in' operator. Property b exists but 'in' returns false. This breaks property detection!
#javascript #javascripttricks #proxy #hastrap #propertydetection #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #proxytraps #advancedjavascript
Private Fields Use # Symbol?!
Private fields are HIDDEN! The # symbol makes properties truly private. You can't access them from outside, even with bracket notation. This is REAL privacy!
#javascript #javascripttricks #privatefields #symbol #encapsulation #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #classprivacy #advancedjavascript
this Binding Changes in Arrow Functions?!
Arrow functions STEAL this! They don't have their own this binding. Regular functions use dynamic this, arrows use lexical this. This difference BREAKS code!
#javascript #javascripttricks #thisbinding #arrowfunctions #contextbinding #javascriptweird #javascriptquiz #codingchallenge #javascriptshorts #javascriptwtf #functioncontext #advancedjavascript
parseInt('08') Returns WHAT?!
JavaScript parseInt has a hidden trap! Leading zeros create unexpected results. This bug has broken production code. See what happens!
#javascript #javascripttricks #codingtips #programmingtutorial #parseint #numberparsing #javascriptquiz #codingchallenge #javascriptshorts #javascriptbugs #octalnumbers #javascriptwtf
Temporal Dead Zone Breaks Code!
JavaScript's Temporal Dead Zone will crash your code! Accessing let/const before declaration throws an error. Watch the chaos!
#javascript #javascripttricks #codingtips #programmingtutorial #temporaldeadzone #javascriptquiz #codingchallenge #javascriptshorts #javascriptbugs #hoisting #javascriptwtf #letconst
Closure With setTimeout Creates Chaos!
Using var in loops with setTimeout creates a closure trap! All timeouts print the same value. This breaks async code! Watch!
#javascript #javascripttricks #codingtips #programmingtutorial #closures #javascriptquiz #codingchallenge #javascriptshorts #javascriptbugs #settimeout #javascriptwtf #asyncclosures
0.1 + 0.2 = 0.30000000000000004?!
JavaScript math is broken! Adding 0.1 + 0.2 creates a number that will shock you. This is why financial apps fail! Watch the chaos!
#javascript #javascripttricks #codingtips #programmingtutorial #floatingpoint #javascriptquiz #codingchallenge #javascriptshorts #javascriptbugs #mathprecision #javascriptwtf #numberprecision
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What will be the output of the below code?
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What will be the output of the below code?
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Javascript quiz
Assuming you enter number 1 in the prompt, what is the output?
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🎯 Let's test your skills on javascript slice
What is the answer?
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What will be the output of the below code?
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What will be the output of the below code?
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What will be the output?
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What will be the output of the below code?
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What will be the output of the below #javascript code?
