Synchronous Xhr for Blob & Data Urls blocks Worker thread

Issue #1295420 • Assigned to Nishant N.


Jan 6, 2015
This issue is public.
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Steps to reproduce


Repro Steps:

This test starts synchronous Xhr for Http, Blob, and Data Urls in separate worker threads. It then waits for the worker to send a message back and prints “PASS” or “FAIL” if it sends no message back (i.e., the thread is blocked).

In IE 11.0.14 (11 Nov 2014), the Http requests will pass but Blob and Data requests will fail.

In Firefox and Chrome, all requests pass.

Expected Results:

Synchronous XMLHttpRequest for Data or Blob Urls should not block the worker thread; they should succeed or throw an error.

Actual Results:

Dev Channel specific:



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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Tony S.”

      Changed Assigned To to “Venkat K.”

      Changed Assigned To from “Venkat K.” to “Krunal S.”

      Changed Status to “Confirmed”

      Changed Assigned To from “Krunal S.” to “IE F.”

      Changed Status from “Confirmed” to “Won’t fix”

      Changed Assigned To to “Nishant N.”

      Changed Status from “Won’t fix”

      Changed Status to “Confirmed”

      Changed Status from “Confirmed”

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