add some packages

node_modules/babel-plugin-transform-property-literals/lib/escape-string-literal.js

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+"use strict";
+/**
+ * Original Source:
+ * https://github.com/shapesecurity/shift-codegen-js/blob/0d09bd8a/src/coderep.js#L122
+ *
+ * The following function is an exact copy of the original implementation
+ *
+ * LICENSE
+
+Copyright 2014 Shape Security, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+ */
+
+module.exports = function escapeStringLiteral(stringValue) {
+  let result = "";
+  let nSingle = 0,
+      nDouble = 0;
+
+  for (let i = 0, l = stringValue.length; i < l; ++i) {
+    let ch = stringValue[i];
+
+    if (ch === '"') {
+      ++nDouble;
+    } else if (ch === "'") {
+      ++nSingle;
+    }
+  }
+
+  let delim = nDouble > nSingle ? "'" : '"';
+  result += delim;
+
+  for (let i = 0; i < stringValue.length; i++) {
+    let ch = stringValue.charAt(i);
+
+    switch (ch) {
+      case delim:
+        result += "\\" + delim;
+        break;
+
+      case "\n":
+        result += "\\n";
+        break;
+
+      case "\r":
+        result += "\\r";
+        break;
+
+      case "\\":
+        result += "\\\\";
+        break;
+
+      case "\u2028":
+        result += "\\u2028";
+        break;
+
+      case "\u2029":
+        result += "\\u2029";
+        break;
+
+      default:
+        result += ch;
+        break;
+    }
+  }
+
+  result += delim;
+  return result;
+};

node_modules/babel-plugin-transform-property-literals/lib/index.js

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+"use strict";
+
+const _require = require("./property-name"),
+      reduceStaticPropertyNameES5 = _require.reduceStaticPropertyNameES5;
+
+module.exports = function ({
+  types: t
+}) {
+  return {
+    name: "transform-property-literals",
+    visitor: {
+      // { 'foo': 'bar' } -> { foo: 'bar' }
+      ObjectProperty: {
+        exit(path) {
+          const key = path.get("key");
+
+          if (!key.isStringLiteral()) {
+            return;
+          }
+
+          const newNode = t.clone(path.node);
+          newNode.key = reduceStaticPropertyNameES5(t, key.node);
+          newNode.computed = false;
+          path.replaceWith(newNode);
+        }
+
+      }
+    }
+  };
+};

node_modules/babel-plugin-transform-property-literals/lib/property-name.js

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+"use strict";
+
+const _require = require("esutils"),
+      keyword = _require.keyword;
+
+const escapeStringLiteral = require("./escape-string-literal");
+
+module.exports = {
+  reduceStaticPropertyNameES5
+};
+/**
+ *
+ * Original Source:
+ * https://github.com/shapesecurity/shift-codegen-js/blob/0d09bd8a/src/minimal-codegen.js#L635
+ *
+ * This implementation modifies the original source in the following ways
+ * + Check for ES5 Identifier name instead of ES6 Identifier name
+ * + Use Babel-Types & Babel's AST instead of ShiftAST
+ *
+ * LICENSE
+
+Copyright 2014 Shape Security, Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+ */
+
+function reduceStaticPropertyNameES5(t, node) {
+  if (keyword.isIdentifierNameES5(node.value)) {
+    return t.Identifier(node.value);
+  }
+
+  let n = parseFloat(node.value);
+
+  if (n >= 0 && n.toString() === node.value) {
+    return t.NumericLiteral(n);
+  }
+
+  return t.Identifier(escapeStringLiteral(node.value));
+}