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Kenneth Lum 2021-10-23 15:46:39 -07:00 • committed by GitHub
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1-js/04-object-basics/07-optional-chaining/article.md
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@ -25,7 +25,7 @@ That's the expected result. JavaScript works like this. As `user.address` is `un
In many practical cases we'd prefer to get `undefined` instead of an error here (meaning "no street").
...And another example. In the web development, we can get an object that corresponds to a web page element using a special method call, such as `document.querySelector('.elem')`, and it returns `null` when there's no such element.
...and another example. In Web development, we can get an object that corresponds to a web page element using a special method call, such as `document.querySelector('.elem')`, and it returns `null` when there's no such element.
```js run
// document.querySelector('.elem') is null if there's no element