Function: insertCSS()

insertCSS(injection)

insertCSS(injection): Promise<void>

Inserts a CSS stylesheet into a target context. If multiple frames are specified, unsuccessful injections are ignored.

▪ injection: CSSInjection

The details of the styles to insert.

The insertCSS method provides its result via callback or returned as a Promise (MV3 only). It has no parameters.

insertCSS(injection, callback): void

Inserts a CSS stylesheet into a target context. If multiple frames are specified, unsuccessful injections are ignored.

▪ injection: CSSInjection

The details of the styles to insert.

▪ callback: () => void

Invoked upon completion of the injection.