How to convert a string which is an array to an array using JavaScript

Question

I am trying to store some array in .env files but when I access the particular value I got typeof string and I have use forEach to process my next step. in the .env file, email is stored like this

EMAILS = JSON.stringify(['[email protected]','[email protected]'])

I have used in this way also

EMAILS = ['[email protected]','[email protected]']

and in this way a

EMAILS = "['[email protected]','[email protected]']"

I want to make that array which is showing type of string into a normal array.

.env is not a javascript file, it is just a txt file. if you want to store multiple values, you can do the following EMAILS = [email protected];[email protected] and parse that string when you are reading the variable const emails = process.env.EMAILS.split(';') — AngelSalazar
– AngelSalazar, Commented May 15, 2020 at 14:28
It's not very clear. Do you mean to say while storing you're using JSON.stringify and you'd like to parse it back into the array while retrieving? — ABGR
– ABGR, Commented May 15, 2020 at 14:29

sdgluck · Accepted Answer · 2020-05-15 14:32:09Z

1

It would be better not to store serialised JSON inside an .env file. Instead, store your "array" of items as a delimited list, for example using commas to separate the individual values. Like this:

# .env
[email protected],[email protected]

// javascript
const emails = env.EMAILS.split(",")

However, if you must store a serialised array, then you can parse it into JS by using JSON.parse:

# env
EMAILS=["[email protected]","[email protected]"]

// javascript
const emails = JSON.parse(env.EMAILS)

answered May 15, 2020 at 14:32

sdgluck

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