Sometimes, we want to get the index from a JSON object with value with JavaScript.

In this article, we’ll look at how to get the index from a JSON object with value with JavaScript.

How to get the index from a JSON object with value with JavaScript?

To get the index from a JSON object with value with JavaScript, we can use the array findIndex method.

For instance, we write:

const data = [{
  "name": "allFit",
  "section": "left"
}, {
  "name": "allbMatches",
  "section": "left"
}, {
  "name": "allOffers",
  "section": "left"
}, {
  "name": "allInterests",
  "section": "left"
}, {
  "name": "allResponses",
  "section": "left"
}, {
  "name": "divChanged",
  "section": "right"
}];

const val = "allInterests"
const index = data.findIndex((item) => {
  return item.name === val
});

console.log(index);

to call data.findIndex with a callback that finds the first item where the name property of an object in data is equal to val and returns the index of that object.

Therefore, index is 3 since the 4th object in data has name set to 'allInterests'.

Conclusion

To get the index from a JSON object with value with JavaScript, we can use the array findIndex method.