回答編集履歴
1
いろいろ修正
answer
CHANGED
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@@ -2,11 +2,12 @@
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2
2
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例えば、以下のようにすればIDをキーにして、パスワードを取得できると思います。
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3
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```js
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4
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let db = null;
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5
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+
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class IDB {
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constructor(options) {
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7
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-
this._dbName = options.databaseName || '
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this._dbName = options.databaseName || 'mydb';
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this._dbVersion = options.databaseVersion || 1;
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-
this._storeName = options.storeName || '
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this._storeName = options.storeName || 'mystore';
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this._keyPath = options.keyPath;
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this._db = null;
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this._store = null;
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@@ -38,18 +39,17 @@
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}
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async putOne(data, storeName) {
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-
return new Promise((resolve, reject) => {
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return new Promise(async (resolve, reject) => {
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-
storeName = storeName || this._storeName;
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storeName = storeName || this._storeName;
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if (!data) throw new Error('put no data');
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await this.open();
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await this.open();
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const tx = this._db.transaction(
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const tx = this._db.transaction(this._storeName, 'readwrite');
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-
const store = tx.objectStore(
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const store = tx.objectStore(this._storeName);
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let err = null;
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-
const tx = store.transaction;
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-
tx.oncomplete = evt => {
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tx.oncomplete = evt => {
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-
if (err) {
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if (err) {
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reject(err);
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reject(err);
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-
} else {
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} else {
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resolve(data);
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}
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};
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@@ -58,7 +58,7 @@
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};
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const req = store.put(data);
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req.onerror = evt => {
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err = req.error;
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err = req.error;
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err.data = data;
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}
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req.success = evt => {
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@@ -68,12 +68,13 @@
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}
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async getOne(key) {
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-
return new Promise((resolve, reject) => {
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return new Promise(async (resolve, reject) => {
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-
await this.open();
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await this.open();
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const tx =
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const tx = this._db.transaction(this._storeName);
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const store = tx.objectStore(this._storeName);
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let res = null;
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let res = null;
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let err = null;
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-
tx.oncomplete = evt => {
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tx.oncomplete = evt => {
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if (err) {
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reject(err);
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} else {
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@@ -83,7 +84,8 @@
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tx.onerror = evt => {
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reject(tx.error);
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};
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const req = store.get(key);
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-
req.onsuccess = evt => {
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req.onsuccess = evt => {
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res = req.result;
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};
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req.onerror = evt => {
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@@ -95,9 +97,9 @@
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const idb = new IDB({
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98
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-
databaseName: '
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100
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+
databaseName: 'mydb',
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-
storeName: '
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101
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storeName: 'mystore',
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100
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-
keyPath: '
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102
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keyPath: 'MYID',
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});
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async function idbPut(data) {
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@@ -111,18 +113,15 @@
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111
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async function idbGet(id) {
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try {
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114
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const
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116
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const res = await idb.getOne(id);
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115
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return pass;
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return res.pass;
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} catch(err) {
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console.log(err);
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118
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-
}
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}
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}
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// indexedDBにユーザー登録
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idbPut({MYID:'MYID', pass:'PASS'});
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120
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121
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-
// indexedDBにユーザー登録
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122
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-
idbPut({id:'hoge', pass:'fuga'});
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123
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-
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-
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125
125
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// indexedDBからユーザー(のパス)を取得
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126
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-
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126
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+
idbGet('MYID').then(pass => console.log(pass));
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127
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-
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```
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