We are excited to announce another update in On-Page API!
The Waterfall endpoint will now show you if a certain resource blocks page rendering. In this case, the new is_render_blocking field will be true.
Render-blocking resources are files such as CSS, JavaScript, and fonts that prevent a page from rendering until they are loaded. These resources can have a high impact on page loading time and user experience, so it’s essential to identify and optimize them.
To start using the new Waterfall’s response field, don’t forget to set load_resources to true when making a POST request to On-Page API.
Updated structure of the objects you get in the resources array of the Waterfall’s response :
{
"url": "https://dataforseo.com/wp-content/plugins/dataforseo-kb/assets/css/grid.min.css?ver=5.8.6",
"initiator": "(index)",
"duration_time": 27,
"fetch_start": 36,
"fetch_end": 63,
"location": {
"line": 50,
"offset_left": 1,
"offset_top": 6487
},
"is_render_blocking": false
}