如何將popup.js的值傳遞給background.js

Question

我希望將popup.js的值傳遞給background.js，以便我可以像期望的那樣打開網站。我使用localStorage變量作爲我的json的值。但是當發現我已經在參數輸入中找到了background.js的值時，函數openTab（輸入）始終是字符串「localStorage.input」本身。我該如何解決它？

popup.js

window.onload=function() 
{ 
    localStorage.input=document.getElementById("search").value； 

    document.getElementById("submit").onclick=function() 
    { 
     chrome.extension.sendMessage({command:"start",input:localStorage.input}); 
    } 
} 

background.js

chrome.runtime.onMessage.addListener(
    function(request,sender,sendResponse) 
    { 
     switch(request.command) 
     { 
      case "start": 
       openTab(request.input); 
       break; 
     } 

     return true; 
    } 
); 

var openTab=function(input) 
{ 
    chrome.windows.create 
    (
     { 
      url:"http://www.baidu.com/s?wd="+input, 
     } 

    ); 
}; 

Answer 1

嘗試了這一點

var lStore = localStorage.input || ''; 
window.onload=function() 
{ 
    var search = document.getElementById("search"); 
    search.value = lStore 

    document.getElementById("submit").onclick=function() 
    { 
     // var input = search.value; //try this as well 
     var input = lStore; 
     chrome.extension.sendMessage({command:"start",input:input}); 
    } 
}