You can do it with template literals. Use join() with )( separator, and wrap the result with ():

const data = ['abc', 'yte', 'juu'];

const result = `(${data.join(')(')})`;
console.log(result);

Thinking "I need the fastest and cleanest way to do this." is often not ideal. In most cases what people want is the most readable and understandable way to implement a solution.

I quite like the following. Where we first bracket each item in the array with map and then join the items with no delimiter:

const data = ['abc', 'yte', 'juu'];
let brackets = data.map(x => "(" + x + ")");
let result = brackets.join("")
console.log(result);

That of course takes two passes over the array. If you really must have the fastest solution just use a for loop:

const data = ['abc', 'yte', 'juu'];
let result = "";
for (let item of data) {
    result += "(" + item + ")";
}
console.log(result);

const list = ['abc', 'yte', 'juu'];
const result = list.map(value => `(${value})`).join("");
console.log(result);