How to access variables?

Question

There is some javascript code below. Please, can you tell me how to access and change the variable data? (I mean add some numbers to array)

    const data = {
      labels: labels,
      datasets: [{
        label: 'myDataLabel',
        backgroundColor: 'green',
        borderColor: 'green',
        data: [0, 6, 4],
      }]
    };

I tried console.log(data.datasets.data), but console show that it's undefined

datasets is an array, so use indexes. ````console.log(data.datasets[0].data)```` — Abito Prakash, Nov 05 '22 at 14:42

score 0 · Answer 1 · answered Nov 05 '22 at 14:48

data.datasets is an array, so you need to access the first (and only) element using [0]:

data.datasets[0].data.push(10, 20);

That will push 10 and 20 onto the end of the data array. Using . to access data would work if datasets was an object with a data property, but it's not, it's an array. So you have to use array notation ([...]) to access its elements.

How to access variables?

1 Answers1