Categories
javascript json key object

Use Javascript to check if JSON object contain value

I want to check if a certain key in a JSON object like the one below contains a certain value. Let’s say I want to check if the key “name”, in any of the objects, has the value “Blofeld” (which is true). How can I do that?

[ {
"id" : 19,
"cost" : 400,
"name" : "Arkansas",
"height" : 198,
"weight" : 35
}, {
"id" : 21,
"cost" : 250,
"name" : "Blofeld",
"height" : 216,
"weight" : 54
}, {
"id" : 38,
"cost" : 450,
"name" : "Gollum",
"height" : 147,
"weight" : 22
} ]

you can also use Array.some() function:

const arr = [
{
id: 19,
cost: 400,
name: 'Arkansas',
height: 198,
weight: 35
},
{
id: 21,
cost: 250,
name: 'Blofeld',
height: 216,
weight: 54
},
{
id: 38,
cost: 450,
name: 'Gollum',
height: 147,
weight: 22
}
];
console.log(arr.some(item => item.name === 'Blofeld'));
console.log(arr.some(item => item.name === 'Blofeld2'));
// search for object using lodash
const objToFind1 = {
id: 21,
cost: 250,
name: 'Blofeld',
height: 216,
weight: 54
};
const objToFind2 = {
id: 211,
cost: 250,
name: 'Blofeld',
height: 216,
weight: 54
};
console.log(arr.some(item => _.isEqual(item, objToFind1)));
console.log(arr.some(item => _.isEqual(item, objToFind2)));

<script src="https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js"></script>