For example, we might need to grab the city name of the primary office from a user record retrieved from a 3rd-party API: To extract the primary office city name we might start with the following code: Straightforward enough. Issue was fixed by adding babel and the default config file babel.config.js. Optional chaining was added in ES2020, which isn't supported by the node.js yet. @evilebottnawi Closing the issue because I removed the template looks like excessive bureaucracy. Note that you cannot use angle-bracket type assertion style (var x = bar;) when using jsx: true. SyntaxError: Unexpected token; SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Optional chaining Unexpected token. Syntax Error with Optional Chaining in Typescript 3.9.7. By clicking “Sign up for GitHub”, you agree to our terms of service and Follow #1248 (opens new window) for more details. Fingers crossed! Input Code The text was updated successfully, but these errors were encountered: It looks like you just deleted our lovely crafted issue template. TypeScript With Babel: A Beautiful Marriage img. For more details, take a look at the pull request that added this functionality. So, next time when using primevue with vue 3 make sure to use babel as well. You signed in with another tab or window. Successfully merging a pull request may close this issue. so fix of this issue will be in webpack@5: #10227 (comment), Add @babel/plugin-proposal-optional-chaining and @babel/plugin-proposal-nullish-coalescing-operator plugins in your config, Do not upgrade to version 3.8 or set compiler option target to es2019, Do you want to request a feature or report a bug? Tagged with typescript, javascript, news. Learn how to use optional chaining for cleaning up your code. Status of Vue.js 3.x supports. I still get the same unexpected token at each use of optional chaining I have in my code. - DEV Community img Breaking Changes . operator for optional property accesses. In this … For more details, take a look at the pull request that added this functionality. provides a concise way of accessing the value of a property that is deep within a chain of connected objects without having to explicitly validate the reference. More info here It negates null and undefined types from variables. It is useful when accessing a property of an object which may be nullish (null or undefined). @evilebottnawi looks like @inoyakaigor updated the description and also provided a reproduction repo. Use //# instead; SyntaxError: a declaration in the head of a for-of loop can't have an initializer; SyntaxError: applying the 'delete' operator to an unqualified name is deprecated; SyntaxError: for-in loop head declarations may not have initializers javascript by Angry Aardvark on Feb 25 2020 Donate TypeScript 3.7 发布了,此版本带来了许多新特性。Optional Chaining首先一大亮点是 Optional Chaining,这是社区呼唤特别强烈的一个 ECMAScript 特性。最初它是 TypeScript 的 issue 跟踪器上第 16 个 issue,于 5 年前提交,要知道目前总共有多达 23000 个 issue。 Yes, if you are running recent versions of React and TypeScript: TypeScript 3.7 supports optional chaining; Babel 7.8.0 supports optional chaining; Projects created with create react app 3.3.0 supports optional chaining as well! from the error) added in typescript 3.7. Consider a case where you use the Array.find function, where you know that an … Turning off the rule in the ESLint configuration file does not ignore the warning. // 修改成这样就… Learn how to use optional chaining for cleaning up your code. 可选链?Optional chain ?基于 @vue/cli@4.5 构建的 工程 | vue@2.x + typescript + jest问题// 跑 jest 单元测试的时候,总会报: SyntaxError: Unexpected token '.' If TypeScript version is auto-detected, which it is by default, and there are several projects with different TypeScript versions in your solution, ReSharper will use the highest version for the whole solution. to your account, UPD for everyone who will find this issue. Successfully merging a pull request may close this issue. 7 chaining issue issue 2Oct. If you're using the Windows app, you can click Help, and then Reset App Data. webpack uses my .babelrc (I tried to remove .babelrc and errors did change) I tried place .babelrc content into webpack.config.js I tried run development build. In this article, I brief what is Optional Chaining, and why it's a game-changer. Using the