get first from set javascript code example

Example 1: set in javascript

// set is used for storing unique values
const firstSet = new Set([1, 2, 3]);

firstSet.add('hi'); //adding value to set

firstSet.add(3); //this will not give any error and it will also not be added

firstSet.delete('hi');//removing value from set

console.log(firstSet.has('hi'));//checking 'hi' is in the set or not

// showing all values in the set
console.log(firstSet);
for (const entry of firstSet.values()) {
    console.log(entry);

Example 2: add to set js

const mySet = new Set();

mySet.add(15);
mySet.add(33);
mySet.add(15);

for(let item of mySet) {
	console.log(item)
    // expected output: 15
	// expected output: 33
}

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