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4.6 KiB
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4.6 KiB
{"version":3,"names":["_helperPluginUtils","require","_core","_default","exports","default","declare","api","loose","_api$assumption","assertVersion","noDocumentAll","assumption","name","manipulateOptions","_","parser","plugins","push","visitor","LogicalExpression","path","node","scope","operator","ref","assignment","isStatic","left","t","cloneNode","isPattern","replaceWith","template","statement","ast","generateUidIdentifierBasedOnNode","id","assignmentExpression","conditionalExpression","binaryExpression","nullLiteral","logicalExpression","buildUndefinedNode","right"],"sources":["../src/index.ts"],"sourcesContent":["import { declare } from \"@babel/helper-plugin-utils\";\nimport { types as t, template } from \"@babel/core\";\n\nexport interface Options {\n loose?: boolean;\n}\n\nexport default declare((api, { loose = false }: Options) => {\n api.assertVersion(REQUIRED_VERSION(7));\n const noDocumentAll = api.assumption(\"noDocumentAll\") ?? loose;\n\n return {\n name: \"transform-nullish-coalescing-operator\",\n manipulateOptions: process.env.BABEL_8_BREAKING\n ? undefined\n : (_, parser) => parser.plugins.push(\"nullishCoalescingOperator\"),\n\n visitor: {\n LogicalExpression(path) {\n const { node, scope } = path;\n if (node.operator !== \"??\") {\n return;\n }\n\n let ref;\n let assignment;\n // skip creating extra reference when `left` is static\n if (scope.isStatic(node.left)) {\n ref = node.left;\n assignment = t.cloneNode(node.left);\n } else if (scope.path.isPattern()) {\n // Replace `function (a, x = a.b ?? c) {}` to `function (a, x = (() => a.b ?? c)() ){}`\n // so the temporary variable can be injected in correct scope\n path.replaceWith(template.statement.ast`(() => ${path.node})()`);\n // The injected nullish expression will be queued and eventually transformed when visited\n return;\n } else {\n ref = scope.generateUidIdentifierBasedOnNode(node.left);\n scope.push({ id: t.cloneNode(ref) });\n assignment = t.assignmentExpression(\"=\", ref, node.left);\n }\n\n path.replaceWith(\n t.conditionalExpression(\n // We cannot use `!= null` in spec mode because\n // `document.all == null` and `document.all` is not \"nullish\".\n noDocumentAll\n ? t.binaryExpression(\"!=\", assignment, t.nullLiteral())\n : t.logicalExpression(\n \"&&\",\n t.binaryExpression(\"!==\", assignment, t.nullLiteral()),\n t.binaryExpression(\n \"!==\",\n t.cloneNode(ref),\n scope.buildUndefinedNode(),\n ),\n ),\n t.cloneNode(ref),\n node.right,\n ),\n );\n },\n },\n };\n});\n"],"mappings":";;;;;;AAAA,IAAAA,kBAAA,GAAAC,OAAA;AACA,IAAAC,KAAA,GAAAD,OAAA;AAAmD,IAAAE,QAAA,GAAAC,OAAA,CAAAC,OAAA,GAMpC,IAAAC,0BAAO,EAAC,CAACC,GAAG,EAAE;EAAEC,KAAK,GAAG;AAAe,CAAC,KAAK;EAAA,IAAAC,eAAA;EAC1DF,GAAG,CAACG,aAAa,uCAAoB,CAAC;EACtC,MAAMC,aAAa,IAAAF,eAAA,GAAGF,GAAG,CAACK,UAAU,CAAC,eAAe,CAAC,YAAAH,eAAA,GAAID,KAAK;EAE9D,OAAO;IACLK,IAAI,EAAE,uCAAuC;IAC7CC,iBAAiB,EAEbA,CAACC,CAAC,EAAEC,MAAM,KAAKA,MAAM,CAACC,OAAO,CAACC,IAAI,CAAC,2BAA2B,CAAC;IAEnEC,OAAO,EAAE;MACPC,iBAAiBA,CAACC,IAAI,EAAE;QACtB,MAAM;UAAEC,IAAI;UAAEC;QAAM,CAAC,GAAGF,IAAI;QAC5B,IAAIC,IAAI,CAACE,QAAQ,KAAK,IAAI,EAAE;UAC1B;QACF;QAEA,IAAIC,GAAG;QACP,IAAIC,UAAU;QAEd,IAAIH,KAAK,CAACI,QAAQ,CAACL,IAAI,CAACM,IAAI,CAAC,EAAE;UAC7BH,GAAG,GAAGH,IAAI,CAACM,IAAI;UACfF,UAAU,GAAGG,WAAC,CAACC,SAAS,CAACR,IAAI,CAACM,IAAI,CAAC;QACrC,CAAC,MAAM,IAAIL,KAAK,CAACF,IAAI,CAACU,SAAS,CAAC,CAAC,EAAE;UAGjCV,IAAI,CAACW,WAAW,CAACC,cAAQ,CAACC,SAAS,CAACC,GAAG,UAAUd,IAAI,CAACC,IAAI,KAAK,CAAC;UAEhE;QACF,CAAC,MAAM;UACLG,GAAG,GAAGF,KAAK,CAACa,gCAAgC,CAACd,IAAI,CAACM,IAAI,CAAC;UACvDL,KAAK,CAACL,IAAI,CAAC;YAAEmB,EAAE,EAAER,WAAC,CAACC,SAAS,CAACL,GAAG;UAAE,CAAC,CAAC;UACpCC,UAAU,GAAGG,WAAC,CAACS,oBAAoB,CAAC,GAAG,EAAEb,GAAG,EAAEH,IAAI,CAACM,IAAI,CAAC;QAC1D;QAEAP,IAAI,CAACW,WAAW,CACdH,WAAC,CAACU,qBAAqB,CAGrB5B,aAAa,GACTkB,WAAC,CAACW,gBAAgB,CAAC,IAAI,EAAEd,UAAU,EAAEG,WAAC,CAACY,WAAW,CAAC,CAAC,CAAC,GACrDZ,WAAC,CAACa,iBAAiB,CACjB,IAAI,EACJb,WAAC,CAACW,gBAAgB,CAAC,KAAK,EAAEd,UAAU,EAAEG,WAAC,CAACY,WAAW,CAAC,CAAC,CAAC,EACtDZ,WAAC,CAACW,gBAAgB,CAChB,KAAK,EACLX,WAAC,CAACC,SAAS,CAACL,GAAG,CAAC,EAChBF,KAAK,CAACoB,kBAAkB,CAAC,CAC3B,CACF,CAAC,EACLd,WAAC,CAACC,SAAS,CAACL,GAAG,CAAC,EAChBH,IAAI,CAACsB,KACP,CACF,CAAC;MACH;IACF;EACF,CAAC;AACH,CAAC,CAAC","ignoreList":[]} |