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首先尝试在这里扩展一个chrome。我想在我的银行网站的交易列表中添加一些持久性复选框,以协助与外部预算工具协调。我已经有所有工作,但我无法从Chrome存储API(使用本地)检索数据。结果始终未定义,即使我正在测试在成功写入存储的同一回调中检索值。chrome.storage.local总是返回undefined

manifest.json的:

{ 
    "name": "Reconciler", 
    "version": "1.0.0", 
    "manifest_version": 2, 
    "background": { 
    "scripts": ["injector.js"], 
    "persistent": false 
    }, 
    "permissions": [ 
    "activeTab", 
    "storage", 
    "https://mybank*" 
    ], 
    "browser_action": { 
    "default_title": "Add reconciling buttons" 
    } 
} 

injector.js:

chrome.browserAction.onClicked.addListener(function(tab) { 
    chrome.tabs.insertCSS(null, {file: "reconciler.css"}); 
    chrome.tabs.executeScript(null, {file: "jquery-3.2.0.min.js"}); 
    chrome.tabs.executeScript(null, {file: "md5.js"}); 
    chrome.tabs.executeScript(null, {file: "reconciler.js"}); 
}); 

reconciler.js:检查时

$("#transactions thead tr").append("<th class='reconcile'>Reconcile</th>"); 

$("#transactions tbody tr").each(function(){ 
    $this = $(this); 
    var rel_hash = "md5_" + hex_md5($this.find("img.expand-trans").first().attr("rel")); 
    $this.append("<td class='reconcile'><input type='checkbox' id='" + rel_hash + "' name='" + rel_hash + "'></td>"); 
    chrome.storage.local.get(rel_hash, function(items) { 
     $("#"+rel_hash).attr("checked", items[rel_hash]); 
    }); 
}); 

$("#transactions input[type=checkbox]").change(function(){ 
    var rel_hash = $(this).attr("id"); 
    var checked = this.checked; 
    chrome.storage.local.set({rel_hash: checked}, function() { 
     if(chrome.runtime.lastError) { 
      console.error(
       "Error setting " + key + " to " + JSON.stringify(data) + 
       ": " + chrome.runtime.lastError.message 
      ); 
     } else { 
      console.log('Saved ' + rel_hash + '=' + checked); 
      chrome.storage.local.get(rel_hash, function(items) { 
       console.log(rel_hash + "=" + items[rel_hash]); 
      }); 
     } 
    }); 
}); 

控制台输出和取消选中:

Saved md5_516654acf57d9bd95cdbe497f7ca6c8d=true 
md5_516654acf57d9bd95cdbe497f7ca6c8d=undefined 
Saved md5_516654acf57d9bd95cdbe497f7ca6c8d=false 
md5_516654acf57d9bd95cdbe497f7ca6c8d=undefined 
Saved md5_ee541d5b1d95768cef9c257ca88c8ced=true 
md5_ee541d5b1d95768cef9c257ca88c8ced=undefined 
+1

一切似乎确定。我通常使用[存储区域资源管理器](https://chrome.google.com/webstore/detail/storage-area-explorer/ocfjjjjhkpapocigimmppepjgfdecjkb)查看“本地”或“同步”状态。您也可以在控制台上记录'items'变量或'Object.keys(items)' – Ionut

+0

Bah,Storage Area Explorer告诉我它正在存储{“rel_hash”:true},而不是将key的值用于rel_hash。 – shadfc

回答

0

问题不在于存储API交互;这是我试图定义要发送到存储API的对象的方式。我需要设置一个动态密钥:

.... 
var data = {}; 
data[rel_hash] = checked; 
chrome.storage.local.set(data, function() { 
.... 
+0

{[rel_hash]:checked} https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Operators/Object_initializer#Computed_property_names –

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