Chrome.storage.sync.get不在本地变量中存储值 [英] Chrome.storage.sync.get not storing value in local variable

问题描述

function getBugVal() {
    var bugVal = "";

    chrome.storage.sync.get('bugId', function (obj) {
        console.log(obj.bugId);
        bugVal = obj.bugId;
        console.log(bugVal + "<- val inside get sync");
    });

    console.log(bugVal + "<- val outside get sync");
    return bugVal;
}

如果我调用getBugVal()，则返回值将始终指示空字符串，而不是chrome.storage.sync.get中的实际值.bugVal甚至没有保存字符串值.

If I call getBugVal() the return value keeps indicating an empty string instead of the actual value from the chrome.storage.sync.get. bugVal is not even saving the string value.

console.log(bugVal + "<- val inside get sync");

在内部函数调用中产生正确的值.有想法吗?

yields the correct value within the inner function call. Thoughts?

推荐答案

是的.这就是异步代码的工作方式.您将必须使用回调.这样的事情可能会起作用.

Yep. That's how async code works. You'll have to use callbacks. Something like this would probably work.

function workWithBugVal(val) {
    // Do stuff
}

function getBugVal(callback) {
    var bugVal = "";

    chrome.storage.sync.get('bugId', function (obj) {
        console.log(obj.bugId);
        bugVal = obj.bugId;
        callback(bugVal);
    });
}

getBugVal(workWithBugVal);

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