Use JavaScript bracket notation property with key and array index to get value by key in an array of objects.
arrayObj[0]['key']JavaScript gets value by key in an array of objects
A simple example code has an array of objects, which contain an array of named objects, and I need to get the object value where the key is “name” in the first object.
Extract Specific Key’s Values From an Array of Objects.
<!DOCTYPE html>
<html>
<body>
<script>
var arrayObj = [
{ name:"string 1", value:"this", other: "that" },
{ name:"string 2", value:"this", other: "that" }
];
var res = arrayObj[0]['name']
console.log(res)
</script>
</body>
</html>
Output:
Extract all values from the array object of the key Using Array.prototype.map()
const users = [
{ id: 0, name: 'John' },
{ id: 1, name: 'Wayne' },
{ id: 2, name: 'David' },
];
const names = users.map(function (user) {
return user.name;
});
console.log(names);Output: [ “John”, “Wayne”, “David” ]
Do comment if you have any doubts or suggestions on this JS array object topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version