Javascript HTML5本地存储未正确存储
我不知道我是否理解了“存储”的正确上下文,但根据一些教程,我使用了以下Javascript代码,使页面能够本地存储(无会话)提交的数据,但当我关闭页面并重新打开页面时,内容不会出现 script.jsJavascript HTML5本地存储未正确存储,javascript,html,Javascript,Html,我不知道我是否理解了“存储”的正确上下文,但根据一些教程,我使用了以下Javascript代码,使页面能够本地存储(无会话)提交的数据,但当我关闭页面并重新打开页面时,内容不会出现 script.js 函数启动() { var saveButton=document.getElementById('save'); var retrieveButton=document.getElementById('retrieve'); var deleteButton=document.getElement
函数启动()
{
var saveButton=document.getElementById('save');
var retrieveButton=document.getElementById('retrieve');
var deleteButton=document.getElementById('delete');
var reviewButton=document.getElementById('review');
saveButton.addEventListener('单击',saveItem);
retrieveButton.addEventListener('单击',retrieveItem);
deleteButton.addEventListener('单击',删除项);
reviewButton.addEventListener('click',ReviewWall');
}
函数saveItem()
{
var key=document.getElementById('key')。值;
var value=document.getElementById('value').value;
localStorage[键]=值;
}
函数retrieveItem()
{
var data=document.getElementById('data');
var key=document.getElementById('key')。值;
var值=本地存储[key];
data.innerHTML=''+key+':''+value+'';
}
函数deleteItem()
{
如果(确认('删除?'))
{
var key=document.getElementById('key')。值;
localStorage.removietem(键);
data.innerHTML=“已删除”;
}
}
函数reviewAll()
{
for(var i=0;i';
}
}
addEventListener(“加载”,启动);
index.html
演示HTML5
键:
值:
没有数据
如果您在隐私模式下使用浏览器,它将在您关闭浏览器时清除所有本地存储数据。首先,您必须检查您的浏览器是否支持本地存储If(typeof(Storage)!=“undefined”){//Store localStorage.setItem(“varname”,“data”);}else{alert(“抱歉,您的浏览器不支持Web存储…”)}
@Farshad是的。它确实支持存储。它实际上会存储该值,直到浏览器关闭。如果您希望在页面关闭操作之后仍保留该值。你可以用cookies@Farshad我认为本地存储可以实现这一点,而无需使用cookies。是的,HTML5中添加了此功能。我找到了这篇使用html5 localstorage的文章和代码示例。没有。我没有使用隐私模式。但我认为这种本地存储功能并不可靠
function initiate()
{
var saveButton = document.getElementById('save');
var retrieveButton = document.getElementById('retrieve');
var deleteButton = document.getElementById('delete');
var reviewButton = document.getElementById('review');
saveButton.addEventListener('click', saveItem);
retrieveButton.addEventListener('click', retrieveItem);
deleteButton.addEventListener('click', deleteItem);
reviewButton.addEventListener('click', reviewAll);
}
function saveItem()
{
var key = document.getElementById('key').value;
var value = document.getElementById('value').value;
localStorage[key] = value;
}
function retrieveItem()
{
var data = document.getElementById('data');
var key = document.getElementById('key').value;
var value = localStorage[key];
data.innerHTML = '<div>' + key + ': ' + value + '</div>';
}
function deleteItem()
{
if (confirm('Delete?'))
{
var key = document.getElementById('key').value;
localStorage.removeItem(key);
data.innerHTML = '<div>Deleted.</div>';
}
}
function reviewAll()
{
for(var i = 0; i < localStorage.length; i++)
{
var key = localStorage.key(i);
var value = localStorage[key];
data.innerHTML += '<div>' + key + ': ' + value + '<br></div>';
}
}
addEventListener("load", initiate);
<html lang="en">
<head>
<meta charset="utf-8" />
<link rel="stylesheet" href="mystyles.css" />
<script src="script.js"></script>
<title>Demo HTML5</title>
</head>
<body>
<section id="formSection">
<form name="dataForm">
<label for="key">Key: </label><br />
<input type="text" id="key" name="key" /> <br />
<label for="value">Value: </label><br />
<textarea name="value" id="value"></textarea><br />
<input type="button" id="save" value="Save" />
<input type="button" id="retrieve" value="Retrieve" />
<input type="button" id="delete" value="Delete" />
<input type="button" id="review" value="Review" />
</form>
</section>
<section id="data">
No data
</section>
</body>
</html>