medium_js_this_keyword_section_1.js

var age = 2;
const person = {
    age: 1,
    doSomething(name) {
        console.log(this === person);
        console.log(this.age);
        console.log(name);
    },
};
const extractFn = person.doSomething;

extractFn('rick');                 // false 2 rick
extractFn.call(person, 'rick');    // true 1 rick
extractFn.apply(person, ['rick']); // true 1 rick