@babel/helper-plugin-utils - npm Package Compare versions

Comparing version 7.0.0-beta.41 to 7.0.0-beta.42

lib/index.js

@@ -9,3 +9,3 @@ "use strict";
     if (!api.assertVersion) {
-      api = Object.assign({}, api, {
+      api = Object.assign(copyApiObject(api), {
         assertVersion: function assertVersion(range) {
@@ -21,2 +21,20 @@ throwVersionError(range, api.version);
 
+function copyApiObject(api) {
+  var proto = null;
+
+  if (typeof api.version === "string" && /^7\./.test(api.version)) {
+    proto = Object.getPrototypeOf(api);
+
+    if (proto && (!has(proto, "version") || !has(proto, "transform") || !has(proto, "template") || !has(proto, "types"))) {
+      proto = null;
+    }
+  }
+
+  return Object.assign({}, proto, api);
+}
+
+function has(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
 function throwVersionError(range, version) {
@@ -23,0 +41,0 @@ if (typeof range === "number") {

package.json

 {
   "name": "@babel/helper-plugin-utils",
-  "version": "7.0.0-beta.41",
+  "version": "7.0.0-beta.42",
   "description": "General utilities for plugins to use",
@@ -5,0 +5,0 @@ "author": "Logan Smyth <[e-mail]>",

src/index.js

@@ -6,3 +6,3 @@ export function declare(builder) {
       // versions of Babel 7's beta that didn't have it.
-      api = Object.assign({}, api, {
+      api = Object.assign(copyApiObject(api), {
         assertVersion(range) {
@@ -18,2 +18,29 @@ throwVersionError(range, api.version);
 
+function copyApiObject(api) {
+  // Babel >= 7 <= beta.41 passed the API as a new object that had
+  // babel/core as the prototype. While slightly faster, it also
+  // means that the Object.assign copy below fails. Rather than
+  // keep complexity, the Babel 6 behavior has been reverted and this
+  // normalizes all that for Babel 7.
+  let proto = null;
+  if (typeof api.version === "string" && /^7\./.test(api.version)) {
+    proto = Object.getPrototypeOf(api);
+    if (
+      proto &&
+      (!has(proto, "version") ||
+        !has(proto, "transform") ||
+        !has(proto, "template") ||
+        !has(proto, "types"))
+    ) {
+      proto = null;
+    }
+  }
+
+  return Object.assign({}, proto, api);
+}
+
+function has(obj, key) {
+  return Object.prototype.hasOwnProperty.call(obj, key);
+}
+
 function throwVersionError(range, version) {
@@ -20,0 +47,0 @@ if (typeof range === "number") {

No alert changes

Improved metrics

Total package byte prevSize

6515

increased by23.84%

Lines of code

139

increased by36.27%

No dependency changes