Adds strictMode option to strict-mode transform (#3562)

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/disable-strict-mode/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["external-helpers", ["transform-es2015-modules-commonjs", { "strictMode": false }]]
+}

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/actual.js

@@ -0,0 +1,3 @@
+import "foo";
+import "foo-bar";
+import "./directory/foo-bar";

packages/babel-plugin-transform-es2015-modules-commonjs/test/fixtures/disable-strict-mode/strictMode-false/expected.js

@@ -0,0 +1,5 @@
+require("foo");
+
+require("foo-bar");
+
+require("./directory/foo-bar");

packages/babel-plugin-transform-strict-mode/README.md

@@ -1,6 +1,11 @@
 # babel-plugin-transform-strict-mode
 
-TODO
+Add the `"use strict";` directive to the top of your files if it is not there
+already.
+
+> This plugin may be enabled via `babel-plugin-transform-es2015-modules-commonjs`.
+> If you wish to disable it you can either turn `strict` off or pass
+> `strictMode: false` as an option to the commonjs transform.
 
 ## Installation
 

packages/babel-plugin-transform-strict-mode/src/index.js

@@ -4,7 +4,7 @@ export default function () {
   return {
     visitor: {
       Program(path, state) {
-        if (state.opts.strict === false) return;
+        if (state.opts.strict === false || state.opts.strictMode === false) return;
 
         let { node } = path;
 

packages/babel-plugin-transform-strict-mode/test/fixtures/disable-strict-mode/options.json

@@ -0,0 +1,5 @@
+{
+  "plugins": [
+    ["transform-strict-mode", { "strictMode": false }]
+  ]
+}

packages/babel-plugin-transform-strict-mode/test/fixtures/disable-strict-mode/strictMode-false/actual.js

@@ -0,0 +1 @@
+foo();

packages/babel-plugin-transform-strict-mode/test/fixtures/disable-strict-mode/strictMode-false/expected.js

@@ -0,0 +1 @@
+foo();