To find the index of an object by key and value in a JavaScript array, we can use the JavaScript array’s findIndex method.
For instance, we can write:
const peoples = [{
"attr1": "bob",
"attr2": "pizza"
},
{
"attr1": "john",
"attr2": "sushi"
},
{
"attr1": "larry",
"attr2": "hummus"
}
];
const index = peoples.findIndex((person) => {
return person.attr1 === "john"
});
console.log(index)
We create the peoples array with objects that have the attr1 and attr2 properties.
Then we call findIndex on peoples with a callback that returns person.attr1 === 'john' .
This will return the index of the first object that has the attr1 property value set to 'john' .
Therefore, index is 1 as a result.
