js 里如何给变量添加单引号

let myVariable = "world";
let stringWithSingleQuotes = "'" + myVariable + "'";
console.log(stringWithSingleQuotes); // 输出: 'world'

let myVariable = "world";
let stringWithSingleQuotes = `'${myVariable}'`;
console.log(stringWithSingleQuotes); // 输出: 'world'

let myVariable = "world";
let stringWithSingleQuotes = JSON.stringify(myVariable);
console.log(stringWithSingleQuotes); // 输出: "world"

let myVariable = "world";
let stringWithSingleQuotes = "'" + JSON.stringify(myVariable).slice(1, -1) + "'";
console.log(stringWithSingleQuotes); // 输出: 'world'

function addSingleQuotes(str) {
    return `'${str}'`;
}

let myVariable = "world";
let stringWithSingleQuotes = addSingleQuotes(myVariable);
console.log(stringWithSingleQuotes); // 输出: 'world'