In the case one of your dependencies is installing babel and you cannot uninstall it yourself, use the complete name of the loader in . This new version comes with some really nice performance improvements and two new cool JavaScript language features: optional chaining and nullish coalescing. Optional Chaining in Javascript via Babel7 | by Jason Child | Medium To fix this, you should uninstall the npm package babel, as it is deprecated in Babel v6. Replace your if..else if…/ nested if-not-null -then-get blocks with ... Is the usage of optional chaining beneficial? I added a .babelrc to the .storybook directory, installed babel-plugin-transform-optional-chaining, and added this to the .babelrc. In addition, to reduce bundle size, Next.js will only load these polyfills for browsers that require them. Polyfill | Laravel Mix Extension Optional chaining . Get code examples like "optional chaining" instantly right from your google search results with the Grepper Chrome Extension. Browser lama mungkin memerlukan polyfill. Old browsers may need polyfills . Unit Tests fail because of. V8's V8: Optional Chaining and Nullish Coalescing in JavaScript GitHub is broken because of optional chaining (?.) is a safe way to access nested object properties, even if an . The Optional Chaining Operator, "Modern" Browsers, and My Mom. . التسلسل الاختياري (غير الإجباري) - JavaScript Those didn't exist in ES5, so you need to install a polyfill to make your code run in older browsers as well: npm install --save es6-promise. According to TC39 it is currently at stage 4 of the proposal process and is prepared for inclusion in the final ECMAScript standard.
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