What are these three dots in the given below code in React, and what does it do?

let combinedData = [...data, ...data2];

In Javascript/react, we call these three dots (…) as spread operators. Now, your next question may be: what do spread operators do? Let me explain it to you.

Using the spread operator, we can copy an array to some other array or object.

Let’s see a simple example:

let data = [
  {
  name: 'john',
  age: 21,
},
  {
  name: 'abrucciu',
  age: 26,
},
  {
  name: 'laopeno',
  age: 16,
},
]

let data2 = [
  {
  name: 'nippe',
  age: 27,
},
  {
  name: 'buioc',
  age: 17,
},
]

let combinedData = [...data, ...data2];

console.log(combinedData)

Output:

Code Explanation:

• The spread operator three dots (…) is used to spread the elements of data and data2 into a new array called combinedData.
• In the console (image attached above), you can see the combined output of both arrays in a single array.

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