insert data at first position in array javascript

// Use unshift method if you don't mind mutating issue
// If you want to avoid mutating issue
const array = [3, 2, 1]

const newFirstElement = 4

const newArray = [newFirstElement].concat(array) // [ 4, 3, 2, 1 ]

console.log(newArray);

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const fruits = [&quot;Banana&quot;, &quot;Orange&quot;, &quot;Apple&quot;, &quot;Mango&quot;];

fruits.unshift(&quot;Lemon&quot;,&quot;Pineapple&quot;);

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