playwright-java/examples/src/main/java/org/example/EvaluateInBrowserContext.java

/*
 * Copyright (c) Microsoft Corporation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.example;

import com.microsoft.playwright.*;

public class EvaluateInBrowserContext {
  public static void main(String[] args) throws Exception {
    Playwright playwright = Playwright.create();
    BrowserType browserType = playwright.firefox();
    Browser browser = browserType.launch();
    BrowserContext context = browser.newContext();
    Page page = context.newPage();
    page.navigate("https://www.example.com/");
    Object dimensions = page.evaluate("() => {\n" +
        "  return {\n" +
        "      width: document.documentElement.clientWidth,\n" +
        "      height: document.documentElement.clientHeight,\n" +
        "      deviceScaleFactor: window.devicePixelRatio\n" +
        "  }\n" +
        "}");
    System.out.println(dimensions);
    browser.close();
    playwright.close();
  }
}