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Babel ãŒ Flow ã‹ã‚‰ TypeScript ã«ç§»è¡Œã—ãŸ
å…ˆæ—¥ Babel ã®ãƒ¡ãƒ³ãƒ†ãƒŠãƒ¼ã¨ã—ã¦çŸ¥ã‚‰ã‚Œã‚‹ NicolÃ² Ribaudo æ°ãŒæ¬¡ã®ãƒ„ã‚¤ãƒ¼ãƒˆã‚’æŠ•ç¨¿ã—ãŸã€‚ We finally finished migrating the Babel monorepo from Flow to TypeScript! It has been a very long process started by @z_bodya, and after migrating package-by-package @JLHwung just opened this PR ðŸ˜„ pic.twitter.com/WKXxV8x2MY â€” NicolÃ² Ribaudo ðŸ³ï¸â€ðŸŒˆ â€¢ ðŸ’™ðŸ’› (@NicoloRibaudo) July 23, 2022 ãã†ã€JavaScript ã®ãƒˆãƒ©ãƒ³ã‚¹ã‚³ãƒ³ãƒ‘ã‚¤ãƒ©ã§ã‚ã‚‹ Babel ã®ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ãŒ Flow ã‹ã‚‰ TypeScrip
mizdra 2022/08/13
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typescript

babel

flowtype
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Babelãƒ—ãƒ©ã‚°ã‚¤ãƒ³ã®é †åºã¨allowDeclareFieldsã®å¦™ | Wantedly Engineer Blog
Babelã§declareã‚¯ãƒ©ã‚¹ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã‚’ä½¿ã†ãŸã‚ã«allowDeclareFieldsã¨ã„ã†ã‚ªãƒ—ã‚·ãƒ§ãƒ³ãŒã‚ã‚Šã¾ã™ã€‚ä¸€è¦‹ã™ã‚‹ã¨å˜ã«è¨å®šã§ã“ã‚Œã‚’æœ‰åŠ¹åŒ–ã™ã‚Œã°ã„ã„ã‚ˆã†ãªæ°—ãŒã—ã¾ã™ãŒã€å®Ÿã¯æ£ã—ãã“ã®è¨å®šã‚’æœ‰åŠ¹åŒ–ã™ã‚‹ã«ã¯ç½ ãŒã‚ã‚Šã¾ã—ãŸã€‚æœ¬è¨˜äº‹ã§ã¯Babelã¨TypeScriptã®ã‚¯ãƒ©ã‚¹ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã‚µãƒãƒ¼ãƒˆã‚’ç´è§£ãã€æ£ã—ã„ç†è§£ã«ã‚‚ã¨ã¥ã„ã¦é©åˆ‡ãªè¨å®šã‚’ç´¹ä»‹ã—ã¾ã™ã€‚ ã‚¯ãƒ©ã‚¹ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã¨ã¯ã‚¯ãƒ©ã‚¹ãƒ•ã‚£ãƒ¼ãƒ«ãƒ‰ã¯JavaScriptã®Stage 3ææ¡ˆã§ã€ã‚¯ãƒ©ã‚¹ã®ç›´ä¸‹ã«å¤‰æ•°å®£è¨€ã®ã‚ˆã†ãªè¨˜æ³•ã§ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹å¤‰æ•°ã‚„ã‚¯ãƒ©ã‚¹å¤‰æ•°ã«ç›¸å½“ã™ã‚‹å®£è¨€ã‚’è¡Œãˆã‚‹ã¨ã„ã†ã‚‚ã®ã§ã™ã€‚ class C { x; y = 42; static a; static b = 42; } console.log(new C().y); // => 42 console.log(C.b); // => 42TypeScriptã§ã¯åž‹å®šç¾©ã‚„ä¿®é£¾åã¨ã¨ã‚‚
mizdra 2022/06/11
babel

typescript

jaavscript
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Babel7.4ã§éžæŽ¨å¥¨ã«ãªã£ãŸbabel/polyfillã®ä»£æ›¿æ‰‹æ®µã¨è¨å®šæ–¹æ³•
Babel7.4.0 ã‹ã‚‰ã€é•·ã„ã“ã¨ãŠä¸–è©±ã«ãªã£ã¦ããŸ @babel/polyfill ãŒéžæŽ¨å¥¨ã¨ãªã‚Šã¾ã—ãŸã€‚åŠ ãˆã¦ã€@babel/preset-env ã¨ @babel/ransf orm-runtime ãŒ core-js@3 ã«å¯¾å¿œã—ãŸã‚ˆã†ã§ã™ðŸŽ‰ ã“ã‚Œã‚‰ã«ä¼´ã„polyfillå‘¨ã‚Šã®è¨å®šæ–¹æ³•ãŒå¤‰ã‚ã£ãŸã®ã§ã€ãã®å†…å®¹ã‚’ãƒ¡ãƒ¢ã—ã¦ãŠã“ã†ã¨æ€ã„ã¾ã™ã€‚ Babel ã¨ core-js ã®é–¢ä¿‚ã®ãŠã•ã‚‰ã„ ã“ã‚Œã‹ã‚‰ã®polyfillè¨å®šæ–¹æ³• 1. preset-env ã¨ useBuiltIns:usage ã§å¿…è¦ãªpolyfillã ã‘èªã¿è¾¼ã‚€æ–¹æ³• 2. preset-env ã¨ useBuiltIns:entry ã§å…¨polyfillã‚’èªã¿è¾¼ã‚€æ–¹æ³• 3. transf orm-runtime ã‚’ä½¿ã†æ–¹æ³• Proposal ã®ä½¿ã„æ–¹ å‚è€ƒ Babel ã¨ core-js ã®é–¢ä¿‚ã®ãŠã•ã‚‰ã„ BabelãŒ
mizdra 2020/04/03
babel

javascript
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Babel7.xæ™‚ä»£ã®polyfillã®è¨å®šæ–¹æ³•ã¨useBuiltInsã®ä»•çµ„ã¿
ES2015+ã§å®Ÿè£…ã™ã‚‹ãŸã‚ã«Babelã®polyfillã‚’åˆ©ç”¨ã™ã‚‹å ´é¢ã¯å¤šã„ã¨æ€ã„ã¾ã™ãŒã€Babel6.xã¾ã§ã¨7.xã§ã¯ãã®å°Žå…¥æ–¹æ³•ãŒå¤‰ã‚ã£ã¦ã„ã‚‹ã®ã§æ³¨æ„ãŒå¿…è¦ã§ã™ã€‚ä»Šå›žã¯Babel7.xã§ã®ç”¨é€”åˆ¥polyfillã®è¨å®šæ–¹æ³•ã¨ã€ã‚ãƒ¢ã¨ãªã‚‹useBuiltInsã‚ªãƒ—ã‚·ãƒ§ãƒ³ã®æŒ™å‹•ã«ã¤ã„ã¦ã¾ã¨ã‚ã¦ã¿ã¾ã™(åŸ·ç†æ™‚ç‚¹ã§ã®Babelã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯7.1.0ã§ã™)ã€‚ ãªãŠã€6.xã¾ã§ã®è¨å®šæ–¹æ³•ã¯ã€ŒBabelã®è¨å®šã‚’è¦‹ç›´ã™ãŸã‚ã®é€†å¼•ãã‚¬ã‚¤ãƒ‰ã€ã«ã¾ã¨ã‚ã¦ã‚ã‚Šã¾ã™ã€‚polyfillã®ã“ã¨ã ã‘ã§ãªãã€Babelã¨ã¯ä½•ã‹ã€ã©ã®ã‚ˆã†ã«åˆ©ç”¨ã™ã‚‹ã®ã‹ã€ã¨ã„ã£ãŸã“ã¨ã‚‚ä½µã›ã¦ã¾ã¨ã‚ã¦ã‚ã‚Šã¾ã™ã®ã§è‰¯ã‘ã‚Œã°ã”å‚è€ƒã«ã©ã†ãžã€‚ 2019/06/21 è¿½è¨˜ Babel7.4.0ã‹ã‚‰ @babel/polyfill ãŒéžæŽ¨å¥¨ã¨ãªã£ã¦ã„ã¾ã™ã€‚å¤‰æ›´ç‚¹ã‚„æ–°ã—ã„è¨å®šæ–¹æ³•ã¯ã€ŒBabel7.4ã§éžæŽ¨å¥¨ã«ãªã£ãŸbabel/polyfillã®ä»£æ›¿
mizdra 2020/04/03
babel

javascript
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