Keydown哪个无法使用Chrome扩展程序

Question

我一直在努力解决谷歌扩展的问题,而你一如既往是我最后的希望!:))

好吧,我想点击我的chrome扩展程序上的按钮,这将导致页面扩展程序上的keydown模拟正在运行.

我认为chrome在我的想法上有一些安全问题,它会阻止键盘模拟(使事件isTrusted:false)并删除哪个属性.

我写的函数在jsfiddle上运行正常,但看起来chrome扩展以不同的方式完成它.

这是内容脚本文件:

chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
  if(request.action == "scrollToTop"){

  }
  else if(request.action == "scrollToBottom"){

  }
  else if(request.action == "enter"){
    triggerKeyboardEvent(document,13);
  }

  function triggerKeyboardEvent(el, keyCode){
    var event = new Event("keydown", {"bubbles":true, "cancelable":true});
    event.which = keyCode;
    el.dispatchEvent(event);
  }

});
chrome.runtime.sendMessage({action : "show"});

登录jsFiddle写道:

Event {isTrusted: false, which: 13}

登录网站:

document.addEventListener('keydown',function (e) {
      console.log(e)
}

写道:

Event {isTrusted: false}

Answer 1

感谢@BG101和@Rob WI发现解决方案是脚本注入！

唯一的事情是，根据MDN KeyboardEvent.initKeyboardEvent() 已被废弃，所以我将代码替换为：

var event = new Event(event, {"bubbles":true, "cancelable":true});

另外，因为我希望触发器在文档上运行，所以我删除了元素选择器。这是我得到的：

chrome.runtime.onMessage.addListener(function (request, sender, sendResponse) {
  if(request.action == "scrollToTop"){
    triggerKeyboardEventOnDocument("keydown",38);

  }
  else if(request.action == "scrollToBottom"){
    triggerKeyboardEventOnDocument("keydown",40);

  }
  else if(request.action == "enter"){
    triggerKeyboardEventOnDocument("keydown",13);
  }

  function triggerKeyboardEventOnDocument(event, keyCode){
    var script = document.createElement('script');

    script.textContent = '(' + function(event, charCode) {

        //Create Event
        var event = new Event(event, {"bubbles":true, "cancelable":true});

        // Define custom values
        // This part requires the script to be run in the page's context
        var getterCode = {get: function() {return charCode}};
        var getterChar = {get: function() {return String.fromCharCode(charCode)}};
        Object.defineProperties(event, {
          charCode: getterCode,
          which: getterCode,
          keyCode: getterCode, // Not fully correct
          key: getterChar,     // Not fully correct
          char: getterChar
        });
        document.dispatchEvent(event);
      } + ')(' + '\"' + event + '\", '+ keyCode + ')';

    (document.head||document.documentElement).appendChild(script);
    script.parentNode.removeChild(script);
  }

});
chrome.runtime.sendMessage({action : "show"});