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Ilya Kantor 2020-10-20 11:55:51 +03:00 • committed by GitHub
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1-js/04-object-basics/07-optional-chaining/article.md
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@ -149,17 +149,20 @@ For example, `?.()` is used to call a function that may not exist.
In the code below, some of our users have `admin` method, and some don't: In the code below, some of our users have `admin` method, and some don't:
```js run ```js run
let user1 = { let userAdmin = {
admin() { admin() {
alert("I am admin"); alert("I am admin");
} }
} }
let user2 = {}; let userGuest = {};
*!* *!*
user1.admin?.(); // I am admin userAdmin.admin?.(); // I am admin
user2.admin?.(); */!*
*!*
userGuest.admin?.(); // nothing (no such method)
*/!* */!*
``` ```