{
"slug": "script_loading",
"term": "Script Loading (defer, async, type=module)",
"category": "frontend",
"difficulty": "intermediate",
"short": "How and when browser downloads and executes JavaScript — defer, async, and type=module control whether scripts block HTML parsing and in what order they run.",
"long": "By default, a \n \n",
"good_code": "\n\n \n \n\n\n\n\n\n\n",
"quick_fix": "Add defer to all app scripts in ; use async only for independent analytics/tracking scripts; never leave bare