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How to create object from array with JavaScript?

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To create object from array with JavaScript, we can use the Object.fromEntries method.

For instance, we write

const dynamicArray = ["2007", "2008", "2009", "2010"];
const obj = Object.fromEntries(
  dynamicArray.map((year) => [
    year,
    {
      something: "based",
      on: year,
    },
  ])
);

console.log(obj);

to call Object.fromEntries with an array that we get from the map method called with a callback that returns arrays with the key and value of each property.

We use Object.fromEntries to convert the nested key-value pair array to an object.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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