问老师一个关于store.openCursor的问题

首页课程实战体系课手记专栏慕课教程

来源：3-6 indexDB-游标

学习plus

2020-10-25 18:30:19

# 具体遇到的问题
视频中老师打印value，就能只能打印出对象

我打印事件e

出现以下内容

想要打印出对象，得要这么写

视频中这个事件对象，就是指代target吗？

requestNode就是e.target？

# 报错信息的截图

# 相关课程内容截图

# 尝试过的解决思路和结果

# 粘贴全部相关代码，切记添加代码注释（请勿截图）

在这里输入代码，可通过选择【代码语言】突出显示
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<ul id="data"></ul>
<script type="text/javascript">
var dataShow = document.querySelector('#data');
var request = indexedDB.open('testDB',9);
request.onsuccess = function(){
console.log('数据库创建或打开成功')
};
request.onerror = function(){
console.log('数据库读取失败')
};
request.onupgradeneeded = function(){
var db = request.result;
console.log('数据库版本升级成功，当前版本号为' + db.version)
var store = db.createObjectStore('test_' + db.version,{keyPath:'id'});
store.createIndex('test1_' + db.version,'name',{unique:false});
store.createIndex('test2_' + db.version,'age',{unique:false});
}

var json = [{
"id":322,
"name":"Lan",
"age":33
},{
"id":21,
"name":"Sky",
"age":21
},{
"id":340,
"name":"Blue",
"age":55
},{
"id":53,
"name":"Tom",
"age":15
},]

setTimeout(function(){
var db = request.result;
var transaction = db.transaction('test_' + request.result.version,'readwrite');
var store = transaction.objectStore('test_'+request.result.version);

for(var i=0; i<json.length; i++){
store.add(json[i]);
}

var index = store.index('test2_' + db.version);
index.get(55).onsuccess = function(e){
console.log(e)
}

var requestNode = store.openCursor(IDBKeyRange.only(340));
requestNode.onsuccess = function(e){
console.log(e)
console.log(requestNode.result.value)
}
},300);
</script>
</body>
</html>