util.isDeepStrictEqual(val1, val2[, options])

• val1 <any>

• val2 <any>

• skipPrototype <boolean> 如果是 true，则在深度严格相等性检查期间跳过原型和构造函数比较。默认值：false。

  ¥skipPrototype <boolean> If true, prototype and constructor comparison is skipped during deep strict equality check. Default: false.

• 返回：<boolean>

  ¥Returns: <boolean>

如果 val1 和 val2 之间存在深度严格相等，则返回 true。否则，返回 false。

¥Returns true if there is deep strict equality between val1 and val2. Otherwise, returns false.

默认情况下，深度严格相等性包括对象原型和构造函数的比较。当 skipPrototype 等于 true 时，如果对象的可枚举属性严格相等，则即使具有不同的原型或构造函数，它们仍可被视为相等。

¥By default, deep strict equality includes comparison of object prototypes and constructors. When skipPrototype is true, objects with different prototypes or constructors can still be considered equal if their enumerable properties are deeply strictly equal.

const util = require('node:util');

class Foo {
  constructor(a) {
    this.a = a;
  }
}

class Bar {
  constructor(a) {
    this.a = a;
  }
}

const foo = new Foo(1);
const bar = new Bar(1);

// Different constructors, same properties
console.log(util.isDeepStrictEqual(foo, bar));
// false

console.log(util.isDeepStrictEqual(foo, bar, true));
// true 拷贝

有关深度严格相等的更多信息，请参见 assert.deepStrictEqual()。

¥See assert.deepStrictEqual() for more information about deep strict equality.