how to convert whole array to string in javascript

I got a question in the interview that he asked to convert the whole array into a String. I tried with toString() but that’s not worked for his output.

input

let a=['20','30','50']

expected output

"['20','30','50']"

>Solution :

Assuming the "output" is the content of this string you want, you can map the values first to wrap them in single-quotes, then join the array with commas and wrap the entire thing in "[...]".

const a = ['20','30','50'];

const str = `"[${a.map(v=>`'${v}'`).join(",")}]"`;

console.log(str);