Is there a way to change a string type array back into an array?
var arr = '[ "abc", "def"]';
console.log(typeof arr) ==> String
How can I convert it back into an array format?
I'm receiving this string-formatted array from an API response, which may contain multiple errors. I aim to convert them into an array for displaying the errors accurately on their respective positions.
Assuming the format of your string matches what you posted in the edit (and not your initial question), then it is considered valid JSON. In this case, you can utilize the JSON.parse method:
let str = '["abc", "def"]';
let arr = JSON.parse(str);
If the structure of your array resembles a JSON array format, it is recommended to utilize a JSON parser for parsing.
Modern browsers typically come equipped with a built-in JSON parser.
arr = JSON.parse(arr);
Alternatively, a more generic approach would involve exploring the use of eval, although this method presents various limitations such as scope, speed, and security concerns.
It is not possible to revert back to an array due to the absence of an actual array.
To create an array, single quotes should be avoided... instead of creating a string. To form an array, consider the example below:
var arr = ["item 1", "item 2"];
UPDATE After providing additional details in your question regarding why you had a string, you can implement the recommended solution:
JSON.parse(arr);
To convert the JSON string into a JSON object, you can use the JSON.parse() method.
EXAMPLE
var data = '[ "123", "456"]';
console.log(typeof data); // string
var dataArray = JSON.parse('[ "123", "456"]');
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