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wip: factor into a "fire an error event" alg
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Lines changed: 74 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -107754,6 +107754,71 @@ document.querySelector("button").addEventListener("click", bound);
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<div w-nodev>
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<p>When the user agent is to <dfn>fire an error event</dfn> named <var>e</var> at
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<code>EventTarget</code> <var>target</var> with a JavaScript value <var>error</var>, an optional
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description of how IDL attributes are to be initialized, and an optional boolean <dfn
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data-x="fire-error-event-redactError"><var>redactError</var></dfn> (default false), it must run
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these steps:</p>
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<ol>
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<li><p>Let <var>event</var> be the result of <span>creating an event</span> using
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<code>ErrorEvent</code>.</p></li>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-Event-type">type</code> attribute to
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<var>e</var>.</p></li>
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<li>
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<p>If <var>redactError</var> is true:</p>
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<ol>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-error">error</code>
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attribute to null.</p></li>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-message">message</code>
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attribute to "<code data-x="">Script error.</code>".</p></li>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-filename">filename</code>
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attribute to the empty string.</p></li>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-lineno">lineno</code>
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attribute to 0.</p></li>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-colno">colno</code>
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attribute to 0.</p></li>
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</ol>
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</li>
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<li>
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<p>Otherwise:</p>
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<ol>
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<li><p>Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-error">error</code>
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attribute to <var>error</var>.</p></li>
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<li>
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<p>
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<!-- INSERT TRACKING-->
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Initialize <var>event</var>'s <code data-x="dom-ErrorEvent-message">message</code>,
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<code data-x="dom-ErrorEvent-filename">filename</code>, <code
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data-x="dom-ErrorEvent-lineno">lineno</code>, and <code
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data-x="dom-ErrorEvent-colno">colno</code> to <span>implementation-defined</span> values
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derived from <var>error</var>.
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</p>
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<p class="note">Browsers implement behavior not specified here or in <ref>JAVASCRIPT</ref> to
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gather values which are helpful, including in unusual cases (e.g., <code
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data-x="">eval</code>). In the future, this might be specified in greater detail.</p>
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</li>
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</ol>
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</li>
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<li><p>Initialize any other IDL attributes of <var>event</var> as described in the invocation of
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this algorithm.</p></li>
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<li><p>Return the result of <span data-x="concept-event-dispatch">dispatching</span>
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<var>event</var> at <var>target</var>.</p></li>
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</ol>
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<p>When the user agent is required to <span id="report-the-error"></span><span
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id="report-the-exception"></span><dfn export>report an exception</dfn> <var>exception</var> which
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is a JavaScript value, for a particular <span>global object</span> <var>global</var>, optional
@@ -107764,43 +107829,22 @@ document.querySelector("button").addEventListener("click", bound);
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<ol>
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<li>Let <var>notHandled</var> be true.</li>
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<li>
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<p>
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<!-- INSERT TRACKING-->
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Let <var>message</var>, <var>filename</var>, <var>line</var> and <var>col</var> be
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<span>implementation-defined</span> values derived from <var>exception</var>.
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</p>
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<p class="note">Browsers implement behavior not specified here or in <ref>JAVASCRIPT</ref> to
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gather values which are helpful, including in unusual cases (e.g., <code
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data-x="">eval</code>). In the future, this might be specified in greater detail.</p>
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</li>
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<li><p>If <var>script</var> is a <span>classic script</span> and <var>script</var>'s <span>muted
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errors</span> is true, then set <var>message</var> to "<code data-x="">Script error.</code>",
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<var>filename</var> to the empty string, <var>line</var> and <var>col</var> to 0, and
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<var>redactError</var> to true.</p></li>
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errors</span> is true, then set <var>redactError</var> to true.</p></li>
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<li>
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<p>If <var>global</var> is not <span>in error reporting mode</span>, then:</p>
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<ol>
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<li>Set <var>global</var>'s <span>in error reporting mode</span> to true.</li>
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<li><p>Let <var>error</var> be null if <var>redactError</var> is true or <var>exception</var>
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is not a JavaScript value, and <var>exception</var> otherwise.</p></li>
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<li>
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<p>If <var>global</var> implements <code>EventTarget</code>, then set <var>notHandled</var> to
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the result of <span data-x="concept-event-fire">firing an event</span> named <code
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data-x="event-error">error</code> at <var>global</var>, using <code>ErrorEvent</code>, with
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the <code data-x="dom-Event-cancelable">cancelable</code> attribute initialized to true, the
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<code data-x="dom-ErrorEvent-message">message</code> attribute initialized to
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<var>message</var>, the <code data-x="dom-ErrorEvent-filename">filename</code> attribute
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initialized to <var>filename</var>, the <code data-x="dom-ErrorEvent-lineno">lineno</code>
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attribute initialized to <var>line</var>, the <code data-x="dom-ErrorEvent-colno">colno</code>
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attribute initialized to <var>col</var>, and the <code
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data-x="dom-ErrorEvent-error">error</code> attribute initialized to <var>error</var>.</p>
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<p>If <var>global</var> implements <code>EventTarget</code>, then set <var>notHandled</var>
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to the result of <span>firing an error event</span> named <code
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data-x="event-error">error</code> at <var>global</var> with <var>exception</var>, with the
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<code data-x="dom-Event-cancelable">cancelable</code> attribute initialized to true, and with
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<span data-x="fire-error-event-redactError">redactError</span> set to
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<var>redactError</var>.</p>
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<p class="note">Returning true in an event handler cancels the event per <span>the event
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handler processing algorithm</span>.</p>
@@ -107824,6 +107868,8 @@ document.querySelector("button").addEventListener("click", bound);
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<li><p>Let <var>workerObject</var> be the <code>Worker</code> object associated with
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<var>global</var>.</p></li>
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<!-- plumbing the values into here is messy, though, because we can't actually expose the
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error in another realm even though the filename etc still can be -->
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<li><p>Set <var>notHandled</var> be the result of <span data-x="concept-event-fire">firing
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an event</span> named <code data-x="event-error">error</code> at <var>workerObject</var>,
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using <code>ErrorEvent</code>, with the <code

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