René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"addEditableTags cannot convert undefined or null to object in getTag","articleBody":"### 🐛 Bug: `TypeError: Cannot convert undefined or null to object` in `getTag` function\n\n**Location:**\ninside the [`getTag` function](https://github.com/contentstack/contentstack-utils-javascript/blob/master/src/entry-editable.ts#L65)\n\n**Error message:**\n\n```bash\nTypeError: Cannot convert undefined or null to object\n    at Function.entries (\u003canonymous\u003e)\n    at getTag\n    ...\n```\n\n---\n\n### 💡 Root Cause\n\nThis error occurs because the check `typeof obj === \"object\"` passes for `null`, which is a known JavaScript quirk (i.e., `typeof null === \"object\"` is true). This results in `Object.entries(null)` being called, which throws a `TypeError`.\n\n---\n\n### 🔍 Where it's happening\n\nIn the `getTag` function:\n\n```ts\nObject.entries(content).forEach(([key, value]) =\u003e {\n    ...\n})\n```\n\nIf `content` is `null`, this line throws because `Object.entries(null)` is invalid.\n\n---\n\n### ✅ Suggested Fix\n\nUpdate the type check before `Object.entries()` to explicitly guard against `null`:\n\n```ts\nif (content == null) {\n    return {};\n}\n```\n\n---\n\n### 🧪 How to Reproduce\n\nPass `null` as the `content` parameter to `getTag`:\n\n```ts\ngetTag(null, 'some.prefix', true, 'en-us', { ...appliedVariants });\n```\n\nThis will reliably produce the error.","author":{"url":"https://github.com/mccarthyk","@type":"Person","name":"mccarthyk"},"datePublished":"2025-10-18T14:17:05.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/193/contentstack-utils-javascript/issues/193"}