約89,400,000件1ページ目

日本語のみで絞り込む


Optional chaining (?.) - JavaScript - MDN Web Docs - Mozilla

developer.mozilla.org
  1. https://developer.mozilla.org
  2. Web
  3. Optional_chaining

2026/5/22 -The optional chaining (?.) operator accesses an object's property or calls a function. If the object accessed or function called using this ...


JavaScript Optional Chaining Operator - W3Schools

www.w3schools.com
  1. https://www.w3schools.com
  2. jsref
  3. jsref_oper_optional

Optional Chaining is a JavaScript 2020 feature. ES 2020 is supported in all modern browsers since September 2020: Chrome 85, Edge 85, Firefox 79, Safari 14 ...


Optional Chaining Operator (?.) in Javascript | by Muhammad Faraz Ali

medium.com
  1. https://medium.com
  2. optional-chaining-operator-in-javas...

2024/3/1 -Optional chaining is a powerful feature introduced in ECMAScript 2020 (ES11) that simplifies working with nested object properties and ...

「javascript optional chaining es version」について

AI回答を見る

[AskJS] Is it a problem if the code base is filled with optional chaining?

www.reddit.com
  1. https://www.reddit.com
  2. javascript
  3. comments
  4. askjs_is...

2024/7/17 -So it's better to not use optional chaining if the nullish values are not expected by letting the code to fail fast in order to quickly discover ...


13-ES6++: Optional Chaining in Javascript - DEV Community

dev.to
  1. https://dev.to
  2. 13-es6-optional-chaining-in-javascript-2jd0

2022/11/25 -Optional chaining is a new way to access properties of objects without having to check if the object is undefined or not. It is a very useful ...


How to use optional chaining in Node.js 12 - Stack Overflow

stackoverflow.com
  1. https://stackoverflow.com
  2. questions
  3. how-to-use-optio...

2020/1/3 -Optional chaining is currently not supported in Node.js version 13 and below. It will be supported from Node.js version 14 and most of the ...


Support ES2020 Optional Chaining Operator · Issue #937 · mozilla/rhino

github.com
  1. https://github.com
  2. mozilla
  3. rhino
  4. issues

2021/6/21 -HI! I'm a JS dev who would love to use Optional Chaining on my current platform which uses Rhino. I'm looking at the attached PR and am ...


JavaScript Optional Chaining - GeeksforGeeks

www.geeksforgeeks.org
  1. https://www.geeksforgeeks.org
  2. javascript
  3. javascript-o...

2026/1/12 -JavaScript Optional Chaining (ES2020) simplifies safe access to deeply nested object properties by preventing errors when values are null or ...


Optional chaining - V8 JavaScript engine

v8.dev
  1. https://v8.dev
  2. features
  3. optional-chaining

2019/8/27 -Optional chaining enables readable and concise expression of property accesses with built-in nullish checking.


ECMAScript 2015 (ES6) | Can I use... Support tables for HTML5, CSS3, etc

caniuse.com
  1. https://caniuse.com
  2. es6,array-includes,async-functions,p...

JavaScript operator: Optional chaining operator ( ?. ) ; Chrome. 4 - 79 : Not supported. 80 - 155 : Supported. See notes: 1. 156 : Supported. See notes: 1 ; Edge ...