Tried to push new key and value but not working.Here given my code. Do not use {'id5':5} Because i am not trying to push object 1. Trying inside object 0
Demo: https://stackblitz.com/edit/js-1guupk
items = [{
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
}];
items.push('id5': 5);
console.log(items);Output should be:
console.log(items);
0: Object
id1: 1
id2: 2
id3: 3
id4: 4
id5: 5
var items = [{
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
}];
// items[0] is an object
items[0].id5= 5;
console.log(items)
items[0] is an object
You are trying to use .push() method on an object, that doesn't work.
To get your result you have to add a property to an object.
For more info visit documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
items = [{
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
}];
items[0]['id5'] = 5;
console.log(items);It doesn't work for you because:
1- items is an array of objects when you push something to the array you add another value to the array example :
items.push("hello")
it results :
items = [{
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
},
"hello"
];
2- your object is just the first element of the array (items[0])
items[0] == {
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
}
3- you can access properties or add a new property to this object by a key this way:
items[0][key] = value; //key as a string
or
items[0].key = value;
it will override the value if the key already existe or add a new one otherwise.
You can perform this task by Destructuring the object
var items = [{
'id1': 1,
'id2': 2,
'id3': 3,
'id4': 4
}];
items = [{
...items[0],
'id5': 5
}]
console.log(items)
