anti-screenshot-lib/anti-screenshot-lib.js

A JavaScript library to prevent screenshots, screen recording, and unauthorized actions.

// AntiScreenshot Library
class AntiScreenshot {
  constructor(options = {}) {
    this.options = Object.assign({
      blockShortcuts: true,
      detectRecording: true,
      blockDevTools: true,
      disableRightClick: true,
      detectDOMManipulation: true,
      targetElements: [],
      systemConfigs: { windows: {}, mac: {}, linux: {} }
    }, options);
    
    this.init();
  }

  init() {
    this.detectOS();
    if (this.options.blockShortcuts) this.blockShortcuts();
    if (this.options.detectRecording) this.detectScreenRecording();
    if (this.options.blockDevTools) this.detectDevTools();
    if (this.options.disableRightClick) this.disableRightClick();
    if (this.options.detectDOMManipulation) this.detectDOMManipulation();
  }

  detectOS() {
    const ua = navigator.userAgent.toLowerCase();
    this.currentOS = ua.includes("win") ? "windows" : ua.includes("mac") ? "mac" : "linux";
  }

  blockShortcuts() {
    document.addEventListener("keydown", (event) => {
      const config = this.options.systemConfigs[this.currentOS] || {};
      if (config.blockAllKeys || (config.blockNavigationKeys && ["ArrowUp", "ArrowDown"].includes(event.key))) {
        event.preventDefault();
      }
      if (event.key === "PrintScreen") {
        event.preventDefault();
        alert("Screenshots are disabled!");
      }
    });
  }

  detectScreenRecording() {
    const origGetDisplayMedia = navigator.mediaDevices.getDisplayMedia;
    navigator.mediaDevices.getDisplayMedia = async function (...args) {
      alert("Screen recording detected!");
      location.reload();
      return origGetDisplayMedia.apply(this, args);
    };
  }

  detectDevTools() {
    setInterval(() => {
      if (window.outerWidth - window.innerWidth > 200) {
        alert("DevTools detected!");
      }
    }, 1000);
  }

  disableRightClick() {
    document.addEventListener("contextmenu", (event) => {
      event.preventDefault();
      alert("Right-click is disabled!");
    });
  }

  detectDOMManipulation() {
    const observer = new MutationObserver(() => {
      alert("DOM Manipulation detected!");
    });
    observer.observe(document.body, { childList: true, subtree: true });
  }
}

export default AntiScreenshot;