JavaScript Basics: Reflect.construct

in #javascript3 years ago (edited)

The method Reflect.construct helps construct a new instance from a constructor function given an array of arguments. It has a functionality similar to the new operator:

    function Employee (firstname, lastname) {
        this.firstname = firstname;
        this.lastname = lastname;
    let employee1 = new Employee("John", "Doe");
    let employee2 = Reflect.construct(Employee, ["Jane", "Doe"]);
    // This can also be done with the spread operator:
    let args = ["John", "Smith"];
    let employee3 = new Employee(...args);

It is generally useful to have an alternative for the new operator, specially when we have an array of arguments. Even though this particular problem has been alleviated in ES6 with the introduction of the spread operator(...). (See the last line in the example code above.)

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Helpful post. thanks for the example.

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Wow amazing programming...thaNks for sharing...

Good information about reflect construct in javascript. You are guiding us like a teacher
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@ghasemkiani Helpful post. Good for beginners.

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will be using Reflect a lot more, thanks for the post

thanks for the post, do you have any idea about browser compatibility?

Thanks, I am learning javascript in codecademy but I am beginner

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