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core(page-functions): don't try to clone a ShadowRoot #9079

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merged 9 commits into from
Jun 7, 2019
Merged

core(page-functions): don't try to clone a ShadowRoot #9079

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a5f9343
#9048 Fix Avoid an excess DOM size error
NickolasBenakis May 29, 2019
5de9be9
bug-fix: Avoid an excess DOM size error #9079
NickolasBenakis May 29, 2019
bf80f17
bug-fix: Avoid an excess DOM size error #9079
NickolasBenakis May 29, 2019
f34fd58
updates
patrickhulce May 31, 2019
51449a0
fix tests I broke
patrickhulce May 31, 2019
a1528b6
Add test for nodes that cannot be inspected
NickolasBenakis Jun 1, 2019
13d4753
Update lighthouse-core/lib/page-functions.js
NickolasBenakis Jun 4, 2019
29b209d
Update lighthouse-core/test/lib/page-functions-test.js
NickolasBenakis Jun 4, 2019
cbd0e48
ShadowRoot
brendankenny Jun 7, 2019
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ShadowRoot
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@brendankenny
brendankenny committed Jun 7, 2019
commit cbd0e4818e07262e384d21510fa441f34aa08eed
6 changes: 4 additions & 2 deletions lighthouse-core/lib/page-functions.js
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Original file line number Diff line number Diff line change
Expand Up @@ -107,14 +107,15 @@ function getElementsInDocument(selector) {

/**
* Gets the opening tag text of the given node.
* @param {Element} element
* @param {Element|ShadowRoot} element
* @param {Array<string>=} ignoreAttrs An optional array of attribute tags to not include in the HTML snippet.
* @return {string}
*/
/* istanbul ignore next */
function getOuterHTMLSnippet(element, ignoreAttrs = []) {
try {
if (element instanceof ShadowRoot && element.host && element.localName !== 'a') {
// ShadowRoots are sometimes passed in; use their hosts' outerHTML.
if (element instanceof ShadowRoot) {
element = element.host;
}

Expand All @@ -126,6 +127,7 @@ function getOuterHTMLSnippet(element, ignoreAttrs = []) {
const match = clone.outerHTML.match(reOpeningTag);
return (match && match[0]) || '';
} catch (_) {
// As a last resort, fall back to localName.
return `<${element.localName}>`;
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@connorjclark connorjclark Jun 3, 2019 •
edited
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can this entire range fail? if it's just the clone, could you reduce the try/catch to just that part?

a comment in the catch block would be useful.

}
}
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