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JavaScript - get index of object in array by property
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In this article, we would like to show you how to get the index of object in an array by property using JavaScript.
In this example, we create a reusable arrow function that accepts three arguments:
arraythat we want to search,propertythat we're looking for,valueof the property.
The method returns the index of the first object that matches the criteria or -1 if not found.
Practical example:
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const getObjectIndex = (array, property, value) => {2
for (let i = 0; i < array.length; ++i) {3
if (array[i][property] === value) {4
return i;5
}6
}7
return -1;8
};9
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// Usage example:12
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const food = [14
{ name: 'Apple', type: 'fruit' },15
{ name: 'Broccoli', type: 'vegetable' },16
{ name: 'Banana', type: 'fruit' },17
{ name: 'Fries', type: 'fast-food' },18
{ name: 'Cherry', type: 'fruit' },19
];20
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console.log(getObjectIndex(food, 'type', 'fruit')); // 022
console.log(getObjectIndex(food, 'type', 'vegetable')); // 123
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console.log(getObjectIndex(food, 'name', 'Banana')); // 225
console.log(getObjectIndex(food, 'name', 'Fries')); // 326
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console.log(getObjectIndex(food, 'name', 'Orange')); // -1