π Have you ever needed to merge arrays, clone objects, or pass multiple arguments to a function efficiently?
π Instead of writing lengthy, repetitive code, JavaScript's spread operator (...) provides a simple and powerful way to do that.
π₯ What is the Spread Operator?
The spread operator (...) allows you to expand elements of an iterable (like arrays or objects) into individual elements.
π Common Use Cases
1οΈβ£ Merging Arrays
// β
Merging Arrays
const frontend = ["React", "Vue", "Angular"];
const backend = ["Node.js", "Django", "Spring"];
const fullStack = [...frontend, ...backend];
console.log(fullStack);
// Output: ["React", "Vue", "Angular", "Node.js", "Django", "Spring"]
// β
Merging Arrays & Objects
const extraInfo = { country: "USA", language: "English" };
const mergedUser = { ...user, ...extraInfo };
console.log(mergedUser);
// Output: { name: "Alice", age: 25, country: "USA", language: "English" }
2οΈβ£ Cloning Arrays & Objects
// β
Cloning Arrays
const originalArray = [1, 2, 3];
const clonedArray = [...originalArray];
console.log(clonedArray);
// Output: [1, 2, 3]
// β
Cloning Objects
const user = { name: "Alice", age: 25 };
const clonedUser = { ...user };
console.log(clonedUser);
// Output: { name: "Alice", age: 25 }
3οΈβ£ Passing Multiple Arguments to a Function
// β
Passing Multiple Arguments to a Function
const numbers = [3, 5, 7];
function sum(a, b, c) { return a + b + c; }
console.log(sum(...numbers));
// Output: 15
π Why Use the Spread Operator?
β Concise & Readable β Reduces clutter in your code.
β Flexible β Works with arrays, objects, and function arguments.
β Safe & Efficient β Prevents modifying original data.
If youβre writing JavaScript, embrace the spread operator to make your code cleaner, shorter, and more powerful! π
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