defineProperties < Object < JavaScript

The Object defineProperties() static method adds or modifies properties on an object and returns the object.

    
    const obj = {};

    Object.defineProperties(obj, {
      property1: {
        value: 42,
        writable: true,
      },
      property2: {
        value: "Hello",
        writable: false,
      },
    });

    console.log(obj.property1);
    // 42