👉 Why Does JavaScript Print undefined? 😳 | Hoisting Explained
Byte Crafts
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👉 Why Does JavaScript Print undefined? 😳 | Hoisting Explained
17 просмотров · 5 дн. назад
Byte Crafts
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17 просмотров · 5 дн. назад
Why does JavaScript return undefined when we use a variable BEFORE declaring it? 🤯
In this short, you'll understand JavaScript Hoisting using the Global Execution Context, Memory Creation Phase, and Call Stack.
We'll break down this code:
console.log(x); var x = 10;
And explain exactly why JavaScript doesn't throw an error and instead gives undefined.
If you're learning JavaScript, React, Node.js or preparing for coding interviews, understanding hoisting is a MUST. 🚀
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