Repro for crbug.com/371503691 (Reduce network error noise in the DevTools Console)

This demo page contains a bunch of examples for error messages generated by XMLHttpRequest or fetch APIs (Design Document).

Steps

Open the Console panel in DevTools, click on the appropriate buttons below, and observe the messages logged to the console.

CORS error scenarios

• Caught fetch CORS error
• Uncaught fetch CORS error
• Uncaught fetch "same-origin" early CORS error
• Caught sync XMLHttpRequest CORS error
• Uncaught sync XMLHttpRequest CORS error
• Async XMLHttpRequest w/ onerror CORS error
• Async XMLHttpRequest w/o onerror CORS error

404 error response scenarios

• fetch 404 response w/ reading ok
• fetch 404 response w/ reading status
• fetch 404 response w/ reading statusText
• fetch 404 response w/o reading ok, status, or statusText

Other demos

1. crbug-124534.glitch.me
2. cors-errors.glitch.me
3. jec-cors-demo.glitch.me