Baseline 2023
Newly available
The replaceSync() method of the CSSStyleSheet interface synchronously replaces the content of the stylesheet with the content passed into it.
The replaceSync() and CSSStyleSheet.replace() methods can only be used on a stylesheet created with the CSSStyleSheet() constructor.
text
A string containing the style rules to replace the content of the stylesheet. If the string does not contain a parsable list of rules, then the value will be set to an empty string.
Note: If any of the rules passed in text are an external stylesheet imported with the @import rule, those rules will be removed, and a warning printed to the console.
None (undefined).
NotAllowedError DOMException
Thrown if the stylesheet was not created using the CSSStyleSheet() constructor or if the stylesheet is flagged as unmodifiable.
In the following example a new stylesheet is created and two CSS rules are added using replaceSync.
const stylesheet = new CSSStyleSheet();
stylesheet.replaceSync("body { font-size: 1.4em; } p { color: red; }");
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