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index.html
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<!doctype html><html lang="en">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>Crash Reporting</title>
<meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
<link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
<meta content="Bikeshed version d765c696b, updated Fri Mar 8 15:58:52 2024 -0800" name="generator">
<link href="https://wicg.github.io/crash-reporting/" rel="canonical">
<meta content="f5ffacff8d2e3be572b7433f05679c6c22f14f26" name="revision">
<meta content="dark light" name="color-scheme">
<link href="https://www.w3.org/StyleSheets/TR/2021/dark.css" media="(prefers-color-scheme: dark)" rel="stylesheet" type="text/css">
<style>/* Boilerplate: style-autolinks */
.css.css, .property.property, .descriptor.descriptor {
color: var(--a-normal-text);
font-size: inherit;
font-family: inherit;
}
.css::before, .property::before, .descriptor::before {
content: "‘";
}
.css::after, .property::after, .descriptor::after {
content: "’";
}
.property, .descriptor {
/* Don't wrap property and descriptor names */
white-space: nowrap;
}
.type { /* CSS value <type> */
font-style: italic;
}
pre .property::before, pre .property::after {
content: "";
}
[data-link-type="property"]::before,
[data-link-type="propdesc"]::before,
[data-link-type="descriptor"]::before,
[data-link-type="value"]::before,
[data-link-type="function"]::before,
[data-link-type="at-rule"]::before,
[data-link-type="selector"]::before,
[data-link-type="maybe"]::before {
content: "‘";
}
[data-link-type="property"]::after,
[data-link-type="propdesc"]::after,
[data-link-type="descriptor"]::after,
[data-link-type="value"]::after,
[data-link-type="function"]::after,
[data-link-type="at-rule"]::after,
[data-link-type="selector"]::after,
[data-link-type="maybe"]::after {
content: "’";
}
[data-link-type].production::before,
[data-link-type].production::after,
.prod [data-link-type]::before,
.prod [data-link-type]::after {
content: "";
}
[data-link-type=element],
[data-link-type=element-attr] {
font-family: Menlo, Consolas, "DejaVu Sans Mono", monospace;
font-size: .9em;
}
[data-link-type=element]::before { content: "<" }
[data-link-type=element]::after { content: ">" }
[data-link-type=biblio] {
white-space: pre;
}
@media (prefers-color-scheme: dark) {
:root {
--selflink-text: black;
--selflink-bg: silver;
--selflink-hover-text: white;
}
}
</style>
<style>/* Boilerplate: style-colors */
/* Any --*-text not paired with a --*-bg is assumed to have a transparent bg */
:root {
color-scheme: light dark;
--text: black;
--bg: white;
--unofficial-watermark: url(https://www.w3.org/StyleSheets/TR/2016/logos/UD-watermark);
--logo-bg: #1a5e9a;
--logo-active-bg: #c00;
--logo-text: white;
--tocnav-normal-text: #707070;
--tocnav-normal-bg: var(--bg);
--tocnav-hover-text: var(--tocnav-normal-text);
--tocnav-hover-bg: #f8f8f8;
--tocnav-active-text: #c00;
--tocnav-active-bg: var(--tocnav-normal-bg);
--tocsidebar-text: var(--text);
--tocsidebar-bg: #f7f8f9;
--tocsidebar-shadow: rgba(0,0,0,.1);
--tocsidebar-heading-text: hsla(203,20%,40%,.7);
--toclink-text: var(--text);
--toclink-underline: #3980b5;
--toclink-visited-text: var(--toclink-text);
--toclink-visited-underline: #054572;
--heading-text: #005a9c;
--hr-text: var(--text);
--algo-border: #def;
--del-text: red;
--del-bg: transparent;
--ins-text: #080;
--ins-bg: transparent;
--a-normal-text: #034575;
--a-normal-underline: #bbb;
--a-visited-text: var(--a-normal-text);
--a-visited-underline: #707070;
--a-hover-bg: rgba(75%, 75%, 75%, .25);
--a-active-text: #c00;
--a-active-underline: #c00;
--blockquote-border: silver;
--blockquote-bg: transparent;
--blockquote-text: currentcolor;
--issue-border: #e05252;
--issue-bg: #fbe9e9;
--issue-text: var(--text);
--issueheading-text: #831616;
--example-border: #e0cb52;
--example-bg: #fcfaee;
--example-text: var(--text);
--exampleheading-text: #574b0f;
--note-border: #52e052;
--note-bg: #e9fbe9;
--note-text: var(--text);
--noteheading-text: hsl(120, 70%, 30%);
--notesummary-underline: silver;
--assertion-border: #aaa;
--assertion-bg: #eee;
--assertion-text: black;
--advisement-border: orange;
--advisement-bg: #fec;
--advisement-text: var(--text);
--advisementheading-text: #b35f00;
--warning-border: red;
--warning-bg: hsla(40,100%,50%,0.95);
--warning-text: var(--text);
--amendment-border: #330099;
--amendment-bg: #F5F0FF;
--amendment-text: var(--text);
--amendmentheading-text: #220066;
--def-border: #8ccbf2;
--def-bg: #def;
--def-text: var(--text);
--defrow-border: #bbd7e9;
--datacell-border: silver;
--indexinfo-text: #707070;
--indextable-hover-text: black;
--indextable-hover-bg: #f7f8f9;
--outdatedspec-bg: rgba(0, 0, 0, .5);
--outdatedspec-text: black;
--outdated-bg: maroon;
--outdated-text: white;
--outdated-shadow: red;
--editedrec-bg: darkorange;
}
@media (prefers-color-scheme: dark) {
:root {
--text: #ddd;
--bg: black;
--unofficial-watermark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='400'%3E%3Cg fill='%23100808' transform='translate(200 200) rotate(-45) translate(-200 -200)' stroke='%23100808' stroke-width='3'%3E%3Ctext x='50%25' y='220' style='font: bold 70px sans-serif; text-anchor: middle; letter-spacing: 6px;'%3EUNOFFICIAL%3C/text%3E%3Ctext x='50%25' y='305' style='font: bold 70px sans-serif; text-anchor: middle; letter-spacing: 6px;'%3EDRAFT%3C/text%3E%3C/g%3E%3C/svg%3E");
--logo-bg: #1a5e9a;
--logo-active-bg: #c00;
--logo-text: white;
--tocnav-normal-text: #999;
--tocnav-normal-bg: var(--bg);
--tocnav-hover-text: var(--tocnav-normal-text);
--tocnav-hover-bg: #080808;
--tocnav-active-text: #f44;
--tocnav-active-bg: var(--tocnav-normal-bg);
--tocsidebar-text: var(--text);
--tocsidebar-bg: #080808;
--tocsidebar-shadow: rgba(255,255,255,.1);
--tocsidebar-heading-text: hsla(203,20%,40%,.7);
--toclink-text: var(--text);
--toclink-underline: #6af;
--toclink-visited-text: var(--toclink-text);
--toclink-visited-underline: #054572;
--heading-text: #8af;
--hr-text: var(--text);
--algo-border: #456;
--del-text: #f44;
--del-bg: transparent;
--ins-text: #4a4;
--ins-bg: transparent;
--a-normal-text: #6af;
--a-normal-underline: #555;
--a-visited-text: var(--a-normal-text);
--a-visited-underline: var(--a-normal-underline);
--a-hover-bg: rgba(25%, 25%, 25%, .2);
--a-active-text: #f44;
--a-active-underline: var(--a-active-text);
--borderedblock-bg: rgba(255, 255, 255, .05);
--blockquote-border: silver;
--blockquote-bg: var(--borderedblock-bg);
--blockquote-text: currentcolor;
--issue-border: #e05252;
--issue-bg: var(--borderedblock-bg);
--issue-text: var(--text);
--issueheading-text: hsl(0deg, 70%, 70%);
--example-border: hsl(50deg, 90%, 60%);
--example-bg: var(--borderedblock-bg);
--example-text: var(--text);
--exampleheading-text: hsl(50deg, 70%, 70%);
--note-border: hsl(120deg, 100%, 35%);
--note-bg: var(--borderedblock-bg);
--note-text: var(--text);
--noteheading-text: hsl(120, 70%, 70%);
--notesummary-underline: silver;
--assertion-border: #444;
--assertion-bg: var(--borderedblock-bg);
--assertion-text: var(--text);
--advisement-border: orange;
--advisement-bg: #222218;
--advisement-text: var(--text);
--advisementheading-text: #f84;
--warning-border: red;
--warning-bg: hsla(40,100%,20%,0.95);
--warning-text: var(--text);
--amendment-border: #330099;
--amendment-bg: #080010;
--amendment-text: var(--text);
--amendmentheading-text: #cc00ff;
--def-border: #8ccbf2;
--def-bg: #080818;
--def-text: var(--text);
--defrow-border: #136;
--datacell-border: silver;
--indexinfo-text: #aaa;
--indextable-hover-text: var(--text);
--indextable-hover-bg: #181818;
--outdatedspec-bg: rgba(255, 255, 255, .5);
--outdatedspec-text: black;
--outdated-bg: maroon;
--outdated-text: white;
--outdated-shadow: red;
--editedrec-bg: darkorange;
}
/* In case a transparent-bg image doesn't expect to be on a dark bg,
which is quite common in practice... */
img { background: white; }
}
</style>
<style>/* Boilerplate: style-counters */
body {
counter-reset: example figure issue;
}
.issue {
counter-increment: issue;
}
.issue:not(.no-marker)::before {
content: "Issue " counter(issue);
}
.example {
counter-increment: example;
}
.example:not(.no-marker)::before {
content: "Example " counter(example);
}
.invalid.example:not(.no-marker)::before,
.illegal.example:not(.no-marker)::before {
content: "Invalid Example" counter(example);
}
figcaption {
counter-increment: figure;
}
figcaption:not(.no-marker)::before {
content: "Figure " counter(figure) " ";
}
</style>
<style>/* Boilerplate: style-dfn-panel */
:root {
--dfnpanel-bg: #ddd;
--dfnpanel-text: var(--text);
--dfnpanel-target-bg: #ffc;
--dfnpanel-target-outline: orange;
}
@media (prefers-color-scheme: dark) {
:root {
--dfnpanel-bg: #222;
--dfnpanel-text: var(--text);
--dfnpanel-target-bg: #333;
--dfnpanel-target-outline: silver;
}
}
.dfn-panel {
position: absolute;
z-index: 35;
width: 20em;
width: 300px;
height: auto;
max-height: 500px;
overflow: auto;
padding: 0.5em 0.75em;
font: small Helvetica Neue, sans-serif, Droid Sans Fallback;
background: var(--dfnpanel-bg);
color: var(--dfnpanel-text);
border: outset 0.2em;
white-space: normal; /* in case it's moved into a pre */
}
.dfn-panel:not(.on) { display: none; }
.dfn-panel * { margin: 0; padding: 0; text-indent: 0; }
.dfn-panel > b { display: block; }
.dfn-panel a { color: var(--dfnpanel-text); }
.dfn-panel a:not(:hover) { text-decoration: none !important; border-bottom: none !important; }
.dfn-panel a:focus {
outline: 5px auto Highlight;
outline: 5px auto -webkit-focus-ring-color;
}
.dfn-panel > b + b { margin-top: 0.25em; }
.dfn-panel ul { padding: 0 0 0 1em; list-style: none; }
.dfn-panel li a {
max-width: calc(300px - 1.5em - 1em);
overflow: hidden;
text-overflow: ellipsis;
}
.dfn-panel.activated {
display: inline-block;
position: fixed;
left: 8px;
bottom: 2em;
margin: 0 auto;
max-width: calc(100vw - 1.5em - .4em - .5em);
max-height: 30vh;
transition: left 1s ease-out, bottom 1s ease-out;
}
.dfn-panel .link-item:hover {
text-decoration: underline;
}
.dfn-panel .link-item .copy-icon {
opacity: 0;
}
.dfn-panel .link-item:hover .copy-icon,
.dfn-panel .link-item .copy-icon:focus {
opacity: 1;
}
.dfn-panel .copy-icon {
display: inline-block;
margin-right: 0.5em;
width: 0.85em;
height: 1em;
border-radius: 3px;
background-color: #ccc;
cursor: pointer;
}
.dfn-panel .copy-icon .icon {
width: 100%;
height: 100%;
background-color: #fff;
display: flex;
justify-content: center;
align-items: center;
position: relative;
}
.dfn-panel .copy-icon .icon::before {
content: "";
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
border: 1px solid black;
background-color: #ccc;
opacity: 0.25;
transform: translate(3px, -3px);
}
.dfn-panel .copy-icon:active .icon::before {
opacity: 1;
}
.dfn-paneled[role="button"] { cursor: help; }
.highlighted {
animation: target-fade 3s;
}
@keyframes target-fade {
from {
background-color: var(--dfnpanel-target-bg);
outline: 5px solid var(--dfnpanel-target-outline);
}
to {
color: var(--a-normal-text);
background-color: transparent;
outline: transparent;
}
}
</style>
<style>/* Boilerplate: style-idl-highlighting */
pre.idl.highlight {
background: var(--borderedblock-bg, var(--def-bg));
}
</style>
<style>/* Boilerplate: style-issues */
a[href].issue-return {
float: right;
float: inline-end;
color: var(--issueheading-text);
font-weight: bold;
text-decoration: none;
}
</style>
<style>/* Boilerplate: style-md-lists */
/* This is a weird hack for me not yet following the commonmark spec
regarding paragraph and lists. */
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<body class="h-entry">
<div class="head">
<p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
<h1 class="p-name no-ref" id="title">Crash Reporting</h1>
<p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2024-07-17">17 July 2024</time></p>
<div data-fill-with="spec-metadata">
<dl>
<dt>This version:
<dd><a class="u-url" href="https://wicg.github.io/crash-reporting/">https://wicg.github.io/crash-reporting/</a>
<dt>Version History:
<dd><a href="https://github.com/WICG/crash-reporting/commits/gh-pages">https://github.com/WICG/crash-reporting/commits/gh-pages</a>
<dt class="editor">Editor:
<dd class="editor p-author h-card vcard" data-editor-id="76841"><a class="p-name fn u-email email" href="mailto:[email protected]">Ian Clelland</a> (<span class="p-org org">Google Inc.</span>)
<dt>Participate:
<dd><a href="https://github.com/WICG/crash-reporting/issues/new">File an issue</a> (<a href="https://github.com/WICG/crash-reporting/issues">open issues</a>)
</dl>
</div>
<div data-fill-with="warning"></div>
<p class="copyright" data-fill-with="copyright"><a href="https://www.w3.org/policies/#copyright">Copyright</a> © 2024 the Contributors to the Crash Reporting Specification, published by the <a href="https://www.w3.org/community/wicg/">Web Platform Incubator Community Group</a> under the <a href="https://www.w3.org/community/about/agreements/cla/">W3C Community Contributor License Agreement (CLA)</a>.
A human-readable <a href="http://www.w3.org/community/about/agreements/cla-deed/">summary</a> is available. </p>
<hr title="Separator for header">
</div>
<div class="p-summary" data-fill-with="abstract">
<h2 class="no-num no-toc no-ref heading settled" id="abstract"><span class="content">Abstract</span></h2>
<p>This document defines mechanism for reporing browser crashes to site owners
through the use of the Reporting API.</p>
</div>
<div data-fill-with="at-risk"></div>
<h2 class="no-num no-toc no-ref heading settled" id="status"><span class="content">Status of this document</span></h2>
<div data-fill-with="status">
<p> This specification was published by the <a href="https://www.w3.org/community/wicg/">Web Platform Incubator Community Group</a>.
It is not a W3C Standard nor is it on the W3C Standards Track.
Please note that under the <a href="https://www.w3.org/community/about/agreements/cla/">W3C Community Contributor License Agreement (CLA)</a> there is a limited opt-out and other conditions apply.
Learn more about <a href="http://www.w3.org/community/">W3C Community and Business Groups</a>. </p>
<p></p>
</div>
<div data-fill-with="at-risk"></div>
<nav data-fill-with="table-of-contents" id="toc">
<h2 class="no-num no-toc no-ref" id="contents">Table of Contents</h2>
<ol class="toc" role="directory">
<li>
<a href="#intro"><span class="secno">1</span> <span class="content">Introduction</span></a>
<ol class="toc">
<li><a href="#examples"><span class="secno">1.1</span> <span class="content">Examples</span></a>
</ol>
<li>
<a href="#concept"><span class="secno">2</span> <span class="content">Concepts</span></a>
<ol class="toc">
<li><a href="#concept-crash"><span class="secno">2.1</span> <span class="content">Crash</span></a>
<li><a href="#concept-oom"><span class="secno">2.2</span> <span class="content">Out-of-Memory</span></a>
<li><a href="#concept-unresponsive"><span class="secno">2.3</span> <span class="content">Unresponsive</span></a>
</ol>
<li><a href="#crash-report"><span class="secno">3</span> <span class="content">Crash Reports</span></a>
<li><a href="#document-policy"><span class="secno">4</span> <span class="content">Document Policy Integration</span></a>
<li>
<a href="#implementation"><span class="secno">5</span> <span class="content">Implementation Considerations</span></a>
<ol class="toc">
<li><a href="#delivery"><span class="secno">5.1</span> <span class="content">Delivery</span></a>
</ol>
<li><a href="#sample-reports"><span class="secno">6</span> <span class="content">Sample Reports</span></a>
<li><a href="#security"><span class="secno">7</span> <span class="content">Security Considerations</span></a>
<li>
<a href="#privacy"><span class="secno">8</span> <span class="content">Privacy Considerations</span></a>
<ol class="toc">
<li><a href="#cross-process-contamination"><span class="secno">8.1</span> <span class="content">Cross-Process Contamination</span></a>
</ol>
<li>
<a href="#index"><span class="secno"></span> <span class="content">Index</span></a>
<ol class="toc">
<li><a href="#index-defined-here"><span class="secno"></span> <span class="content">Terms defined by this specification</span></a>
<li><a href="#index-defined-elsewhere"><span class="secno"></span> <span class="content">Terms defined by reference</span></a>
</ol>
<li>
<a href="#references"><span class="secno"></span> <span class="content">References</span></a>
<ol class="toc">
<li><a href="#normative"><span class="secno"></span> <span class="content">Normative References</span></a>
</ol>
<li><a href="#idl-index"><span class="secno"></span> <span class="content">IDL Index</span></a>
</ol>
</nav>
<main>
<h2 class="heading settled" data-level="1" id="intro"><span class="secno">1. </span><span class="content">Introduction</span><a class="self-link" href="#intro"></a></h2>
<p>[INTRODUCTION GOES HERE]</p>
<h3 class="heading settled" data-level="1.1" id="examples"><span class="secno">1.1. </span><span class="content">Examples</span><a class="self-link" href="#examples"></a></h3>
<div class="example" id="example-eb0762af">
<a class="self-link" href="#example-eb0762af"></a> Unstable, Inc. wants to understand better how often its website is crashing in
the wild. It can do this by delivering the following header to define a
default reporting endpoint, which will direct crash reports there:
<pre>Reporting-Endpoints: default="https://example.com/reports"
</pre>
</div>
<h2 class="heading settled" data-level="2" id="concept"><span class="secno">2. </span><span class="content">Concepts</span><a class="self-link" href="#concept"></a></h2>
<h3 class="heading settled" data-level="2.1" id="concept-crash"><span class="secno">2.1. </span><span class="content">Crash</span><a class="self-link" href="#concept-crash"></a></h3>
<h3 class="heading settled" data-level="2.2" id="concept-oom"><span class="secno">2.2. </span><span class="content">Out-of-Memory</span><a class="self-link" href="#concept-oom"></a></h3>
<h3 class="heading settled" data-level="2.3" id="concept-unresponsive"><span class="secno">2.3. </span><span class="content">Unresponsive</span><a class="self-link" href="#concept-unresponsive"></a></h3>
<h2 class="heading settled" data-level="3" id="crash-report"><span class="secno">3. </span><span class="content">Crash Reports</span><a class="self-link" href="#crash-report"></a></h2>
<p><dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="crash-reports">Crash reports</dfn> indicate that the user was unable to continue using the
page because the browser (or one of its processes necessary for the page)
crashed. For security reasons, no details of the crash are communicated except
for a unique identifier (which can be interpreted by the browser vendor), and
optionally the reason for the crash (such as "oom").</p>
<p><a data-link-type="dfn" href="#crash-reports" id="ref-for-crash-reports">Crash reports</a> are a type of <a data-link-type="dfn" href="https://w3c.github.io/reporting/#report" id="ref-for-report">report</a>.</p>
<p><a data-link-type="dfn" href="#crash-reports" id="ref-for-crash-reports①">Crash reports</a> have the <a data-link-type="dfn" href="https://w3c.github.io/reporting/#report-type" id="ref-for-report-type">report type</a> "crash".</p>
<pre class="idl exclude highlight def">[<a class="idl-code" data-link-type="extended-attribute" href="https://webidl.spec.whatwg.org/#Exposed" id="ref-for-Exposed"><c- g>Exposed</c-></a>=(<c- n>Window</c->,<c- n>Worker</c->)]
<c- b>interface</c-> <dfn class="dfn-paneled idl-code" data-dfn-type="interface" data-export id="crashreportbody"><code><c- g>CrashReportBody</c-></code></dfn> : <a data-link-type="idl-name" href="https://w3c.github.io/reporting/#reportbody" id="ref-for-reportbody"><c- n>ReportBody</c-></a> {
[<a class="idl-code" data-link-type="extended-attribute" href="https://webidl.spec.whatwg.org/#Default" id="ref-for-Default"><c- g>Default</c-></a>] <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-object" id="ref-for-idl-object"><c- b>object</c-></a> <dfn class="dfn-paneled idl-code" data-dfn-for="CrashReportBody" data-dfn-type="method" data-export data-lt="toJSON()" id="dom-crashreportbody-tojson"><code><c- g>toJSON</c-></code></dfn>();
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString"><c- b>DOMString</c-></a>? <dfn class="dfn-paneled idl-code" data-dfn-for="CrashReportBody" data-dfn-type="attribute" data-export data-readonly data-type="DOMString?" id="dom-crashreportbody-reason"><code><c- g>reason</c-></code></dfn>;
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString" id="ref-for-idl-DOMString①"><c- b>DOMString</c-></a>? <dfn class="dfn-paneled idl-code" data-dfn-for="CrashReportBody" data-dfn-type="attribute" data-export data-readonly data-type="DOMString?" id="dom-crashreportbody-stack"><code><c- g>stack</c-></code></dfn>;
};
</pre>
<p>A <a data-link-type="dfn" href="#crash-reports" id="ref-for-crash-reports②">crash report</a>'s <a data-link-type="dfn" href="https://w3c.github.io/reporting/#report-body" id="ref-for-report-body">body</a>, represented in JavaScript by <code class="idl"><a data-link-type="idl" href="#crashreportbody" id="ref-for-crashreportbody">CrashReportBody</a></code>, contains the following fields:</p>
<ul>
<li data-md>
<p><dfn class="dfn-paneled" data-dfn-for="CrashReportBody" data-dfn-type="dfn" data-noexport id="crashreportbody-reason">reason</dfn>: A more specific classification of the
type of crash that occured, if known, or omitted otherwise. The valid <a data-link-type="dfn" href="#crashreportbody-reason" id="ref-for-crashreportbody-reason">reason</a> strings are shown below.</p>
</ul>
<table border="1" cellpadding="5px" style="border-collapse: collapse;">
<tbody>
<tr>
<th><a data-link-type="dfn" href="#crashreportbody-reason" id="ref-for-crashreportbody-reason①">Reason</a>
<th>Description
<tr>
<td>oom
<td>The page ran out of memory.
<tr>
<td>unresponsive
<td>The page was killed due to being unresponsive.
</table>
<ul>
<li data-md>
<p><dfn class="dfn-paneled" data-dfn-for="CrashReportBody" data-dfn-type="dfn" data-noexport id="crashreportbody-stack">stack</dfn>: The string representation of the
JavaScript call stack at the time of the crash, if all of the following are
true, or omitted otherwise:</p>
<ul>
<li data-md>
<p>The crash <a data-link-type="dfn" href="#crashreportbody-reason" id="ref-for-crashreportbody-reason②">reason</a> is "unresponsive".</p>
<li data-md>
<p>The policy value for <code>include-js-call-stacks-in-crash-reports</code> in the <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document" id="ref-for-concept-document">Document</a> which crashed is <code>true</code>.</p>
<li data-md>
<p>The call stack can be recovered from the crashed document.</p>
</ul>
<p>The string representation used for <a data-link-type="dfn" href="#crashreportbody-stack" id="ref-for-crashreportbody-stack">stack</a> is the
same as that used by the <a data-link-type="dfn" href="https://tc39.es/proposal-error-stacks/#sec-get-error.prototype-stack" id="ref-for-sec-get-error.prototype-stack">Error.prototype.stack</a> property.</p>
</ul>
<p class="note" role="note"><span class="marker">Note:</span> Crash reports are always delivered to the <a data-link-type="dfn" href="https://w3c.github.io/reporting/#endpoint" id="ref-for-endpoint">endpoint</a> named <code>default</code>;
there is currently no way to override this. If you want to receive other kinds
of reports, but not crash reports, make sure to use a different name for the
endpoint that you choose for those reports.</p>
<p class="note" role="note"><span class="marker">Note:</span> Crash reports are not observable to JavaScript, as the page which would
receive them is, by definition, not able to. The IDL description of
CrashReportBody exists in this spec to provide a JSON-seriaizable interface
whose serialization can be embedded in the out-of-band reports.</p>
<h2 class="heading settled" data-level="4" id="document-policy"><span class="secno">4. </span><span class="content">Document Policy Integration</span><a class="self-link" href="#document-policy"></a></h2>
<p>Site authors may opt in to recording the JavaScript call stack with some
reports.</p>
<p>This spec defines a <a data-link-type="dfn" href="https://wicg.github.io/document-policy/#configuration-point" id="ref-for-configuration-point">configuration point</a> with the name <code>include-js-call-stacks-in-crash-reports</code>. Its type is boolean, and its default
value is <code>false</code>. When configured as <code>true</code> in a <a data-link-type="dfn" href="https://dom.spec.whatwg.org/#concept-document" id="ref-for-concept-document①">Document</a> for which crash
reporting is enabled, this will cause a string representation of the JavaScript
call stack, at the time of the crash, to be included in a crash report.</p>
<div class="example" id="example-565177e8">
<a class="self-link" href="#example-565177e8"></a>
<pre class="http">Document-Policy: include-js-call-stacks-in-crash-reports</pre>
</div>
<h2 class="heading settled" data-level="5" id="implementation"><span class="secno">5. </span><span class="content">Implementation Considerations</span><a class="self-link" href="#implementation"></a></h2>
<h3 class="heading settled" data-level="5.1" id="delivery"><span class="secno">5.1. </span><span class="content">Delivery</span><a class="self-link" href="#delivery"></a></h3>
<p><a data-link-type="biblio" href="#biblio-reporting" title="Reporting API">[REPORTING]</a>, which defines the framework on which this specification depends,
provides at most a best-efforts delivery mechanism. This is especially true when
it comes to reporting crashes. There are probably always going to be certain
crash conditions which simply cannot be reported on (for instance, if the crash
occurs within the crash-monitoring code of the user agent, or if the computer
hosting the user agent were to suddenly cease to exist). However, many crashes <em>can</em> be observed by modern browsers, and their immediate causes can be deduced.</p>
<p>A user agent implementing crash reports SHOULD attempt to monitor documents for
crashes in a way that will continue to function even when the process which is
responsible for that document crashes, or is terminated by the operating system.</p>
<p>There are multiple ways to implement such a monitor, with varying levels of
reliability and robustness to specific crash causes, and this specification does
not attempt to prescribe any particular such method.</p>
<h2 class="heading settled" data-level="6" id="sample-reports"><span class="secno">6. </span><span class="content">Sample Reports</span><a class="self-link" href="#sample-reports"></a></h2>
<div class="example" id="example-d65bd545">
<a class="self-link" href="#example-d65bd545"></a>
<pre>POST /reports HTTP/1.1
Host: example.com
...
Content-Type: application/reports+json
[{
"type": "crash",
"age": 42,
"url": "https://example.com/",
"user_agent": "Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0",
"body": {
"reason": "oom"
}
}]
</pre>
</div>
<h2 class="heading settled" data-level="7" id="security"><span class="secno">7. </span><span class="content">Security Considerations</span><a class="self-link" href="#security"></a></h2>
<p>For a discussion of security considerations surrounding out-of-band reporting in
general, see <a href="https://w3c.github.io/reporting/#security"><cite>Reporting API</cite> § 8 Security Considerations</a>.</p>
<p>The remainder of this section discusses security considerations for crash
reporting specifically.</p>
<h2 class="heading settled" data-level="8" id="privacy"><span class="secno">8. </span><span class="content">Privacy Considerations</span><a class="self-link" href="#privacy"></a></h2>
<p>For a discussion of privacy considerations surrounding out-of-band reporting in
general, see <a href="https://w3c.github.io/reporting/#privacy"><cite>Reporting API</cite> § 9 Privacy Considerations</a>.</p>
<p>The remainder of this section discusses privacy considerations for crash
reporting specifically.</p>
<h3 class="heading settled" data-level="8.1" id="cross-process-contamination"><span class="secno">8.1. </span><span class="content">Cross-Process Contamination</span><a class="self-link" href="#cross-process-contamination"></a></h3>
</main>
<script src="https://www.w3.org/scripts/TR/2021/fixup.js"></script>
<h2 class="no-num no-ref heading settled" id="index"><span class="content">Index</span><a class="self-link" href="#index"></a></h2>
<h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="content">Terms defined by this specification</span><a class="self-link" href="#index-defined-here"></a></h3>
<ul class="index">
<li><a href="#crashreportbody">CrashReportBody</a><span>, in § 3</span>
<li><a href="#crash-reports">Crash reports</a><span>, in § 3</span>
<li>
reason
<ul>
<li><a href="#dom-crashreportbody-reason">attribute for CrashReportBody</a><span>, in § 3</span>
<li><a href="#crashreportbody-reason">dfn for CrashReportBody</a><span>, in § 3</span>
</ul>
<li>
stack
<ul>
<li><a href="#dom-crashreportbody-stack">attribute for CrashReportBody</a><span>, in § 3</span>
<li><a href="#crashreportbody-stack">dfn for CrashReportBody</a><span>, in § 3</span>
</ul>
<li><a href="#dom-crashreportbody-tojson">toJSON()</a><span>, in § 3</span>
</ul>
<h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span class="content">Terms defined by reference</span><a class="self-link" href="#index-defined-elsewhere"></a></h3>
<ul class="index">
<li>
<a data-link-type="biblio">[DOCUMENT-POLICY]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="ccd8b64e">configuration point</span>
</ul>
<li>
<a data-link-type="biblio">[DOM]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="a973e0fe">document</span>
</ul>
<li>
<a data-link-type="biblio">[ERROR STACKS]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="84afeaae">error.prototype.stack</span>
</ul>
<li>
<a data-link-type="biblio">[REPORTING]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="188c6617">ReportBody</span>
<li><span class="dfn-paneled" id="cf363990">body</span>
<li><span class="dfn-paneled" id="9239678f">endpoint</span>
<li><span class="dfn-paneled" id="9fe8836b">report</span>
<li><span class="dfn-paneled" id="4d5cebba">report type</span>
</ul>
<li>
<a data-link-type="biblio">[WEBIDL]</a> defines the following terms:
<ul>
<li><span class="dfn-paneled" id="8855a9aa">DOMString</span>
<li><span class="dfn-paneled" id="f4531911">Default</span>
<li><span class="dfn-paneled" id="889e932f">Exposed</span>
<li><span class="dfn-paneled" id="efd1ec5d">object</span>
</ul>
</ul>
<h2 class="no-num no-ref heading settled" id="references"><span class="content">References</span><a class="self-link" href="#references"></a></h2>
<h3 class="no-num no-ref heading settled" id="normative"><span class="content">Normative References</span><a class="self-link" href="#normative"></a></h3>
<dl>
<dt id="biblio-document-policy">[DOCUMENT-POLICY]
<dd><a href="https://wicg.github.io/document-policy/"><cite>Document Policy</cite></a>. cg-draft. URL: <a href="https://wicg.github.io/document-policy/">https://wicg.github.io/document-policy/</a>
<dt id="biblio-dom">[DOM]
<dd>Anne van Kesteren. <a href="https://dom.spec.whatwg.org/"><cite>DOM Standard</cite></a>. Living Standard. URL: <a href="https://dom.spec.whatwg.org/">https://dom.spec.whatwg.org/</a>
<dt id="biblio-reporting">[REPORTING]
<dd>Douglas Creager; Ian Clelland; Mike West. <a href="https://w3c.github.io/reporting/"><cite>Reporting API</cite></a>. URL: <a href="https://w3c.github.io/reporting/">https://w3c.github.io/reporting/</a>
<dt id="biblio-webidl">[WEBIDL]
<dd>Edgar Chen; Timothy Gu. <a href="https://webidl.spec.whatwg.org/"><cite>Web IDL Standard</cite></a>. Living Standard. URL: <a href="https://webidl.spec.whatwg.org/">https://webidl.spec.whatwg.org/</a>
</dl>
<h2 class="no-num no-ref heading settled" id="idl-index"><span class="content">IDL Index</span><a class="self-link" href="#idl-index"></a></h2>
<pre class="idl highlight def">[<a class="idl-code" data-link-type="extended-attribute" href="https://webidl.spec.whatwg.org/#Exposed"><c- g>Exposed</c-></a>=(<c- n>Window</c->,<c- n>Worker</c->)]
<c- b>interface</c-> <a href="#crashreportbody"><code><c- g>CrashReportBody</c-></code></a> : <a data-link-type="idl-name" href="https://w3c.github.io/reporting/#reportbody"><c- n>ReportBody</c-></a> {
[<a class="idl-code" data-link-type="extended-attribute" href="https://webidl.spec.whatwg.org/#Default"><c- g>Default</c-></a>] <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-object"><c- b>object</c-></a> <a href="#dom-crashreportbody-tojson"><code><c- g>toJSON</c-></code></a>();
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString"><c- b>DOMString</c-></a>? <a data-readonly data-type="DOMString?" href="#dom-crashreportbody-reason"><code><c- g>reason</c-></code></a>;
<c- b>readonly</c-> <c- b>attribute</c-> <a class="idl-code" data-link-type="interface" href="https://webidl.spec.whatwg.org/#idl-DOMString"><c- b>DOMString</c-></a>? <a data-readonly data-type="DOMString?" href="#dom-crashreportbody-stack"><code><c- g>stack</c-></code></a>;
};
</pre>
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return Object.entries(obj);
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