add source code

Author: aminya

src/index.js

@@ -0,0 +1,23 @@
+'use strict';
+
+module.exports = function ({ types: t }) {
+    return {
+        name: 'transform-not-strict',
+        visitor: {
+            Directive(path) {
+                if (path.node.value.value === 'use strict') {
+                    const siblings = path.container // get all the sibilings (code in the same level) of 'use strict'
+
+                    for (const sibling of siblings) {
+                        if (t.isDirective(sibling)) { // if the sibiling is a directive
+                            if (sibling.value.value === 'not strict') { // check if its 'not strict'
+                                path.remove(); // remove 'use strict'
+                                break;
+                            }
+                        }
+                    }
+                }
+            },
+        },
+    };
+};