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chrome.storageを同期的に扱う(ES7 async/await)

More than 3 years have passed since last update.

Chrome 53以上の環境で、起動オプションに下記のパラメータを追加することによって、async/awaitが使用可能となります。(2016/07/06現在)



(async() => {
    await setLocalStorage({ aaa: 1, bbb: 2 });

    let aaa = await getLocalStorage("aaa");
    let bbb = await getLocalStorage("bbb");
    let all = await getLocalStorage();

    console.log(aaa);// 1
    console.log(bbb);// 2
    console.log(all);// {aaa: 1, bbb: 2}

function setLocalStorage(obj) {
    return new Promise( (resolve) => {
        chrome.storage.local.set( obj, () => resolve() );

function getLocalStorage(key = null) {
    return new Promise( (resolve) => {
        chrome.storage.local.get(key, (item) => {
            key ? resolve(item[key]) : resolve(item);
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