update

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

@@ -0,0 +1,26 @@
+const updateWorkspaces = ({ content, originalContent = {} }) => {
+  const newWorkspaces = content.workspaces
+
+  if (!newWorkspaces) {
+    return originalContent
+  }
+
+  // validate workspaces content being appended
+  const hasInvalidWorkspaces = () =>
+    newWorkspaces.some(w => !(typeof w === 'string'))
+  if (!newWorkspaces.length || hasInvalidWorkspaces()) {
+    throw Object.assign(
+      new TypeError('workspaces should be an array of strings.'),
+      { code: 'EWORKSPACESINVALID' }
+    )
+  }
+
+  return {
+    ...originalContent,
+    workspaces: [
+      ...newWorkspaces,
+    ],
+  }
+}
+
+module.exports = updateWorkspaces