[Webkit-unassigned] [Bug 226635] New: EventSource.constructor throws an exception when the url param is an empty string

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=226635

            Bug ID: 226635
           Summary: EventSource.constructor throws an exception when the
                    url param is an empty string
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zyscoder at gmail.com
                CC: bugs-noreply at webkitgtk.org

Steps to reproduce:

(1) Open a tab and navigate to any URL;
(2) Run the following code in the Console of Devtools:
```
new EventSource("")
```
(3) Then this code would throw a SyntaxError exception.

Actual results:

This code would throw a SyntaxError exception: `SyntaxError: The string did not match the expected pattern.`

Expected results:

As https://html.spec.whatwg.org/multipage/server-sent-events.html#dom-eventsource says, when the URL param is an empty string, it should be parsed as a relative URL to the API's URL.

In fact, Firefox works as the spec says, and Chrome has fixed this problem following the spec nowadays too.

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