happy-dom/src/browser/utilities/BrowserFrameScriptEvaluator.ts

Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.

import IBrowserFrame from '../types/IBrowserFrame.js';
import { Script } from 'vm';

/**
 * Browser frame script evaluator.
 */
export default class BrowserFrameScriptEvaluator {
	/**
	 * Evaluates code or a VM Script in the frame's context.
	 *
	 * @param frame Frame.
	 * @param script Script.
	 * @returns Result.
	 */
	public static evaluate(frame: IBrowserFrame, script: string | Script): any {
		if (!frame.window) {
			throw new Error('The frame has been destroyed, the "window" property is not set.');
		}
		script = typeof script === 'string' ? new Script(script) : script;
		return script.runInContext(frame.window);
	}
}