将表单数据保存到本地存储并在刷新时显示
Posted
技术标签:
【中文标题】将表单数据保存到本地存储并在刷新时显示【英文标题】:Saving form data to local storage and show it on refresh 【发布时间】:2015-02-26 17:44:23 【问题描述】:我正在制作一个表单,用户可以在其中输入他们的数据。我希望通过使用本地存储来保存这个日期。但是当我刷新页面时,仍然会记住身高和体重。而且我一直在努力让性别、运动和生日也被记住。
<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.0rc2/jquery.mobile-1.0rc2.min.css" />
<title>Test</title>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.4.min.js"></script>
<script type="text/javascript" src="http://code.jquery.com/mobile/1.0rc2/jquery.mobile-1.0rc2.min.js"></script>
<script>
$(document).ready(function()
$(window).unload(saveSettings);
loadSettings();
);
function loadSettings()
$('#height').val(localStorage.height);
$('#weight').val(localStorage.weight);
$('#dateOfBirth').val(localStorage.dateOfBirth);
$('input[type=radio]:checked').val(localStorage.gender);
$("#sportive").find("option[value=" + localStorage.sportive + "]").attr("selected", "selected");
function saveSettings()
var height = document.getElementById("height").value;
var weight = document.getElementById("weight").value;
var sportive = document.getElementById("sportive").value;
var gender = $('input[type=radio]:checked').val();
var dateOfBirth = document.getElementById("dateOfBirth").val();
localStorage.height = height;
localStorage.weight = weight;
localStorage.dateOfBirth = dateOfBirth;
localStorage.sportive = sportive;
localStorage.gender = gender;
</script>
</head>
<body>
<div data-role="content">
<form id="myForm" >
gender:
<input id="man" type="radio" name="gender" value="Man" >
<label for="man">Man</label>
<input id="vrouw" type="radio" name="gender" value="Vrouw">
<label for="vrouw" >Vrouw</label>
dateOfBirth:
<input type="date" id="dateOfBirth" name="datum" required />
weight (in kg):
<input type="number" id="weight" name="weight" required />
height (in cm):
<input type="number" id="height" name="height" required />
Hoeveel keer doe je aan sport per week?
<select id="sportive" name="sport">
<option value="1.2" >Weinig of geen training, kantoorwerk</option>
<option value="1.375">Lichte training/sport 1-3 dagen per week</option>
<option value="1.55" >Gemiddelde training/sport 3-5 dagen per week</option>
<option value="1.725" >Zware training/sport 6-7 dagen per week</option>
<option value="1.9" >Zware dagelijkse training/sport plus lichamelijk werk</option>
</select>
<br />
</form>
</div>
</body>
问候
【问题讨论】:
【参考方案1】:您正在使您的脚本复杂化。尝试这个。工作JSFIDDLE
如果您使用过一次 jQuery,请不要将其与纯 javascript 混合使用,例如 document.getElementById()
。并且不要创建一个height
变量来存储$('#height').val()
,你可以直接使用这个。代码更具可读性。
$(document).ready(function()
$(window).unload(saveSettings);
loadSettings();
);
function loadSettings()
$('#height').val(localStorage.height);
$('#weight').val(localStorage.weight);
$('#dateOfBirth').val(localStorage.dateOfBirth);
$('input[value="' + localStorage.gender + '"]').prop('checked', true);
$("#sportive").val(localStorage.sportive);
function saveSettings()
localStorage.height = $('#height').val();
localStorage.weight = $('#weight').val();
localStorage.dateOfBirth = $('#dateOfBirth').val();
localStorage.sportive = $("#sportive").val();
localStorage.gender = $('input[type=radio]:checked').val();
更新:如果你使用的是 jQuery 3,unload 会抛出一个错误。你应该改用这个:
$(window).on('unload', function()
saveSettings();
loadSettings();
);
【讨论】:
以上是关于将表单数据保存到本地存储并在刷新时显示的主要内容,如果未能解决你的问题,请参考以下文章