update

package/node_modules/@npmcli/package-json/lib/update-scripts.js

@@ -0,0 +1,29 @@
+const updateScripts = ({ content, originalContent = {} }) => {
+  const newScripts = content.scripts
+
+  if (!newScripts) {
+    return originalContent
+  }
+
+  // validate scripts content being appended
+  const hasInvalidScripts = () =>
+    Object.entries(newScripts)
+      .some(([key, value]) =>
+        typeof key !== 'string' || typeof value !== 'string')
+  if (hasInvalidScripts()) {
+    throw Object.assign(
+      new TypeError(
+        'package.json scripts should be a key-value pair of strings.'),
+      { code: 'ESCRIPTSINVALID' }
+    )
+  }
+
+  return {
+    ...originalContent,
+    scripts: {
+      ...newScripts,
+    },
+  }
+}
+
+module.exports = updateScripts