javascript - Chrome.storage.local 得到错误的值

Question

我正在尝试从 chrome.storage.local 加载内容，但它不起作用(它总是返回相同的结果，[object OBJECT])。这是我的代码:

    function load()
{
    var loginC = "";
    chrome.storage.local.get('loginC', function(result){
    loginC = result;
        if (loginC != "") {
            document.getElementById("login").value = loginC;
        }
    });

    var passC = "";
    chrome.storage.local.get('passC', function(result){
    passC = result;
        if (passC != "") {
            document.getElementById("pass").value = passC;
        }
    });
}

load();

Answer 1

作为documentation状态，回调接收一个包含结果的对象:

The callback parameter should be a function that looks like this:

function(object items) {...};

object items

Object with items in their key-value mappings.

之所以这样做，是因为一个 get 操作可以检索多个值。

所以一般来说，代码应该如下所示:

chrome.storage.local.get('keyName', function(result) {
  /* use result.keyName */
});

您的代码可以简化为:

chrome.storage.local.get(['loginC', 'passC'], function(result) {
    if (result.loginC) { // Will catch both "" and undefined
        document.getElementById("login").value = result.loginC;
    }
    if (result.passC) {
        document.getElementById("pass").value = result.passC;
    }
});