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Merge pull request #2580 from uniba-ub/issue2450-cssrules-exception

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Check cssRules before css variables are read from stylesheet (again)
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Tim Donohue
2023-10-27 10:27:52 -05:00
committed by GitHub
parent ab171648b6 4dd334f2e7
commit e1e2941983
1 changed files with 15 additions and 0 deletions
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15
src/app/shared/sass-helper/css-variable.service.ts
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@@ -26,6 +26,19 @@ export class CSSVariableService {
return styleSheet.href.indexOf(window.location.origin) === 0; return styleSheet.href.indexOf(window.location.origin) === 0;
}; };
/**
* Checks whether the specific stylesheet object has the property cssRules
* @param styleSheet The stylesheet
*/
hasCssRules = (styleSheet) => {
// Injected (cross-origin) styles might have no css rules value and throw some exception
try {
return styleSheet.cssRules;
} catch (e) {
return false;
}
};
/* /*
Determine if the given rule is a CSSStyleRule Determine if the given rule is a CSSStyleRule
See: https://developer.mozilla.org/en-US/docs/Web/API/CSSRule#Type_constants See: https://developer.mozilla.org/en-US/docs/Web/API/CSSRule#Type_constants
@@ -93,8 +106,10 @@ export class CSSVariableService {
if (isNotEmpty(document.styleSheets)) { if (isNotEmpty(document.styleSheets)) {
// styleSheets is array-like, so we convert it to an array. // styleSheets is array-like, so we convert it to an array.
// Filter out any stylesheets not on this domain // Filter out any stylesheets not on this domain
// Filter out any stylesheets that have no cssRules property
return [...document.styleSheets] return [...document.styleSheets]
.filter(this.isSameDomain) .filter(this.isSameDomain)
.filter(this.hasCssRules)
.reduce( .reduce(
(finalArr, sheet) => (finalArr, sheet) =>
finalArr.concat( finalArr.concat(