How to take value from nested array

Question

I'm having a hard time selecting the price_change of this array.

I tried like this but it doesn't work:

response.data[0].[1d].price_change

Any help is appreciated!

    var stockDiff = document.getElementById("stockDiffCrypto");
    var thePrice = response.data[0].["1d"].price_change;

if (thePrice > 0) {
    stockDiff.innerHTML = `<i class='fas fa-angle-double-up'></i>`
    stockDiff.style.color = "green"
} else {
    stockDiff.innerHTML = `<i class='fas fa-angle-double-down'></i>`
    stockDiff.style.color = "red"
}

Are you getting an error in the console? What happens if you put quotes around "1d": response.data[0].["1d"].price_change? The way you have it now, it's probably trying to evaluate the variable 1d. — mykaf
– mykaf, Commented Oct 7, 2021 at 19:59
I'm getting console error: (Uncaught SyntaxError: missing name after . operator). As well in the script, after response.data[0]. I'm getting error TS1003: (JS) identifier expected — Adam
– Adam, Commented Oct 7, 2021 at 20:00
I just fixed. var thePrice = response.data[0]["1d"].price_change; — Adam
– Adam, Commented Oct 7, 2021 at 20:06

MrMythical · Accepted Answer · 2021-10-07 20:14:45Z

2

variable.["property"] is not valid syntax. These 2 are valid:

variable.property
variable["property"]

This is the same with arrays

array[0][0]

In your case it should be this

var thePrice = response.data[0]["1d"].price_change

answered Oct 7, 2021 at 20:14

MrMythical

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