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Showing content from https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Global_Objects/Boolean/valueOf below:

Boolean.prototype.valueOf() - JavaScript | MDN

Baseline Widely available

Boolean 值的 valueOf() 方法返回 Boolean 对象的原始值。

const x = new Boolean();

console.log(x.valueOf());
// Expected output: false

const y = new Boolean("Mozilla");

console.log(y.valueOf());
// Expected output: true

无。

给定 Boolean 对象的原始值。

Boolean 的 valueOf() 方法以布尔数据类型返回 Boolean 对象或 Boolean 字面量的原始值。

该方法通常在 JavaScript 内部调用，而不是在代码中显式调用。

const x = new Boolean();
const myVar = x.valueOf(); // 给 myVar 赋值 false

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