Posted on Jun 16 Optional Chaining is a feature that simplifies accessing nested properties or calling functions on objects that may be nullish or undefined. It allows you to avoid the common "TypeError: Cannot read property 'x' of undefined" error when accessing properties deep within an object hierarchy.Here's an example to illustrate how optional chaining works:In the example above, the address property is optional. With optional chaining (?.), you can safely access the city property of address even if address itself is null or undefined. If address is null or undefined, the expression will simply return undefined.Optional chaining is especially useful when working with data from APIs or when dealing with complex object structures where certain properties may not always exist.Note that optional chaining is supported in modern JavaScript environments, including most up-to-date browsers. However, if you're working in an older environment or need to support older browsers, you might need to transpile your code using a tool like Babel to ensure compatibility.Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well Confirm For further actions, you may consider blocking this person and/or reporting abuse Tapajyoti Bose - May 14 Caio Borghi - Jun 3 Pantelis Theodosiou - May 29 Mayank - May 14 Once suspended, shameerchagani will not be able to comment or publish posts until their suspension is removed. Once unsuspended, shameerchagani will be able to comment and publish posts again. Once unpublished, all posts by shameerchagani will become hidden and only accessible to themselves. If shameerchagani is not suspended, they can still re-publish their posts from their dashboard. Note: Once unpublished, this post will become invisible to the public and only accessible to Shameer Chagani. They can still re-publish the post if they are not suspended. Thanks for keeping DEV Community safe. Here is what you can do to flag shameerchagani: shameerchagani consistently posts content that violates DEV Community's code of conduct because it is harassing, offensive or spammy. Unflagging shameerchagani will restore default visibility to their posts. DEV Community — A constructive and inclusive social network for software developers. With you every step of your journey. Built on Forem — the open source software that powers DEV and other inclusive communities.Made with love and Ruby on Rails. DEV Community © 2016 - 2023. We're a place where coders share, stay up-to-date and grow their careers.