如何使空值有默认值？

let variable = null;
let defaultValue = "Default Value";

let result = variable || defaultValue;
console.log(result); // 输出 "Default Value"

let variable = null;
let defaultValue = "Default Value";

let result = variable === null || variable === undefined ? defaultValue : variable;
console.log(result); // 输出 "Default Value"

function foo(variable = "Default Value") {
  console.log(variable);
}

foo(); // 输出 "Default Value"
foo(null); // 输出 "Default Value"
foo("Custom Value"); // 输出 "Custom Value"