语法错误：不能删除私有字段

¥Message

SyntaxError: Private fields can not be deleted (V8-based)
SyntaxError: private fields can't be deleted (Firefox)
SyntaxError: Cannot delete private field X (Safari)

¥Error type

¥What went wrong?

有代码试图 delete 对象或类的私有属性（字段或方法）。这是 Javascript 禁止的 - 私有属性不能动态添加或删除。

¥There's code trying to delete a private property (field or method) of an object or a class. This is forbidden by Javascript—private properties cannot be added or removed on the fly.

¥Examples

class MyClass {
  #myPrivateField;
  deleteIt() {
    delete this.#myPrivateField; // SyntaxError: private fields can't be deleted
  }
}

class MyClass {
  #myPrivateMethod() {
  }
  #deleteIt() {
    delete this.#myPrivateMethod; // SyntaxError: private fields can't be deleted
  }
}

¥See also

• 类
• 私有属性