DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0">
<title>indexedDBtitle>
<link href="./favicon.png">
head>
<body>
<button onclick="addDataing()">增button>
<button onclick="deleteDBing()">删button>
<button onclick="updateDBing()">改button>
<button onclick="getDataByKeying()">查button>
body>
<script>
var dbName = 'helloIndexDB',
version = 1,
storeName = 'helloStore',
db;
function openDB() {
const request = window.indexedDB.open(dbName, version)
request.onsuccess = function(event) {
db = event.target.result
console.log('数据库打开成功')
}
request.onerror = function(event) {
console.log('数据库打开报错')
}
request.onupgradeneeded = function(event) {
console.log('据库创建/升级成功')
db = event.target.result
let objectStore
if (!db.objectStoreNames.contains(storeName)) {
objectStore = db.createObjectStore(storeName, {
keyPath: 'id'
})
}
}
}
openDB();
function addData(db, storeName, data) {
let request = db.transaction([storeName], 'readwrite')
.objectStore(storeName)
.add(data)
request.onsuccess = function(event) {
console.log('数据写入成功')
}
request.onerror = function(event) {
console.log('数据写入失败')
throw new Error(event.target.error)
}
}
function getDataByKey(db, storeName, key) {
let transaction = db.transaction([storeName])
let objectStore = transaction.objectStore(storeName)
let request = objectStore.get(key)
request.onerror = function(event) {
console.log('事务失败')
}
request.onsuccess = function(event) {
console.log('主键查询结果: ', request.result)
}
}
function updateDB(db, storeName, data) {
let request = db.transaction([storeName], 'readwrite')
.objectStore(storeName)
.put(data)
request.onsuccess = function() {
console.log('数据更新成功')
}
request.onerror = function() {
console.log('数据更新失败')
}
}
function deleteDB(db, storeName, id) {
let request = db.transaction([storeName], 'readwrite').objectStore(storeName).delete(id)
request.onsuccess = function() {
console.log('数据删除成功')
}
request.onerror = function() {
console.log('数据删除失败')
}
}
function addDataing() {
addData(db, storeName, {
id: (new Date().getTime()).toString(),
name: '张三',
age: 18,
desc: 'helloWord'
})
}
function deleteDBing() {
let id = prompt("请输入删除的id:");
if (id === null || id === "") {
return alert("请输入id");
}
deleteDB(db, storeName, id)
}
function updateDBing() {
let id = prompt("请输入修改的id:");
if (id === null || id === "") {
return alert("请输入id");
}
updateDB(db, storeName, {
id,
name: '张三',
age: 20,
desc: '修改的内容'
})
}
function getDataByKeying() {
let id = prompt("请输入获取的id:");
if (id === null || id === "") {
return alert("请输入id");
}
getDataByKey(db, storeName, id)
}
script>
html>
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