Symbol.prototype.valueOf() - JavaScript 编辑

The valueOf() method returns the primitive value of a Symbol object.

Syntax

Symbol().valueOf()

Return value

The primitive value of the specified Symbol object.

Description

The valueOf() method of Symbol returns the primitive value of a Symbol object as a Symbol data type.

JavaScript calls the valueOf() method to convert an object to a primitive value. You rarely need to invoke the valueOf() method yourself; JavaScript automatically invokes it when encountering an object where a primitive value is expected.

Examples

Using valueOf()

const sym = Symbol("example");
sym === sym.valueOf(); // true

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• Object.prototype.valueOf()