How to check if a Set contains all the items of Another Set in JavaScript - Step by Step Examples

How to check if a Set contains all the items of Another Set in JavaScript ?

Answer

To check if a Set contains all the items of another Set in JavaScript, you can use the Set.prototype.has method along with iteration.

✐ Examples

1 Check if Set Contains All Items

In this example,

We define two Sets named set1 and set2 containing elements of a specific type.
We iterate over each item in set2 and use the Set.prototype.has method to check if it exists in set1.
If any item from set2 is not found in set1, we set containsAllItems to false, otherwise true.
Finally, we print the result to the console.

JavaScript Program

// Define Sets with items
const set1 = new Set(["apple", "banana", "orange", "grape", "melon"]);
const set2 = new Set(["banana", "orange"]);

// Check if set1 contains all items of set2
let containsAllItems = true;
set2.forEach(item => {
    if (!set1.has(item)) {
        containsAllItems = false;
    }
});

// Print result
console.log(`Does set1 contain all items of set2? ${containsAllItems}`);

Output

Does set1 contain all items of set2? true

2 Check if Set Does Not Contain All Items

In this example,

We define two Sets named set1 and set2 containing elements of a specific type.
We iterate over each item in set2 and use the Set.prototype.has method to check if it exists in set1.
If any item from set2 is not found in set1, we set containsAllItems to false.
Finally, we print the result to the console.

JavaScript Program

// Define Sets with items
const set1 = new Set(["apple", "banana", "orange", "grape", "melon"]);
const set2 = new Set(["banana", "peach"]);

// Check if set1 contains all items of set2
let containsAllItems = true;
set2.forEach(item => {
    if (!set1.has(item)) {
        containsAllItems = false;
    }
});

// Print result
console.log(`Does set1 contain all items of set2? ${containsAllItems}`);

Output

Does set1 contain all items of set2? false

Summary

In this tutorial, we learned How to check if a Set contains all the items of Another Set in JavaScript language with well detailed examples.

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How to check if a Set contains all the items of Another Set in JavaScript - Step by Step Examples

How to check if a Set contains all the items of Another Set in JavaScript ?

Answer

✐ Examples

1 Check if Set Contains All Items

JavaScript Program

Output

2 Check if Set Does Not Contain All Items

JavaScript Program

Output

Summary

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