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Merge pull request #6280 from loganfsmyth/only-transform-modules

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Only transform 'this'->'undefined' and inject 'use strict' if module statements are present
This commit is contained in:
Logan Smyth
2017-09-23 11:24:52 -07:00
committed by GitHub
parent d8b7bc39af 2b88e079ef
commit b115ea5da7
35 changed files with 87 additions and 71 deletions
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5
packages/babel-plugin-transform-es2015-modules-commonjs/src/index.js
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@@ -1,4 +1,5 @@
import {
isModule,
rewriteModuleStatementsAndPrepareHeader,
isSideEffectImport,
buildNamespaceInitStatements,
@@ -11,6 +12,10 @@ export default function({ types: t }) {
visitor: {
Program: {
exit(path, state) {
// For now this requires unambiguous rather that just sourceType
// because Babel currently parses all files as sourceType:module.
if (!isModule(path, true /* requireUnambiguous */)) return;
const {
loose,
allowTopLevelThis,

1
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-arrow-function/actual.mjs vendored Normal file
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@@ -0,0 +1 @@
var foo = () => this;

3
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-arrow-function/expected.js vendored Normal file
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@@ -0,0 +1,3 @@
"use strict";
var foo = () => void 0;

1
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-call/actual.mjs vendored Normal file
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@@ -0,0 +1 @@
this.foo();

3
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-call/expected.js vendored Normal file
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@@ -0,0 +1,3 @@
"use strict";
(void 0).foo();

1
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-declaration/actual.mjs vendored Normal file
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@@ -0,0 +1 @@
var self = this;

3
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-declaration/expected.js vendored Normal file
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@@ -0,0 +1,3 @@
"use strict";
var self = void 0;

1
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-reference/actual.mjs vendored Normal file
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@@ -0,0 +1 @@
this;

3
packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/misc/undefined-this-root-reference/expected.js vendored Normal file
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@@ -0,0 +1,3 @@
"use strict";
void 0;