parentStyleSheet returns the stylesheet object in which the current rule is defined.
var stylesheet = cssRule.parentStyleSheet
stylesheet is a stylesheet object.if ( bgRule.parentStyleSheet != mySheet ) {
// alien style rule!
}
See Gecko DOM Reference:event#DOM_styleSheet_Object for more information about the stylesheet object interface.
DOM Level 2 Style - cssRule
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | 1 | ? | 1 | ? | Yes | ? |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | ? | 18 | ? | 4 | Yes | ? | ? |
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https://developer.mozilla.org/en-US/docs/Web/API/CSSRule/parentStyleSheet