表单存储 JavaScript API（Form storage JavaScript API）
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小牛编辑
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2023-12-01
描述 (Description)
可以使用JavaScript API实现表单存储。 这里，Framework7在任何输入更改上调用formToJSON ，在pageInit事件上调用formToJSON 。 所有表单数据都使用密钥存储在本地存储中。 应用程序使用表单数据管理这些本地存储密钥的方法如下所示 -
| S.No | 课程和描述 | 参数 |
|---|---|---|
| 1 | myApp.formGetData(formId) 当您打开动画时，此事件将被触发。 |
|
| 2 | myApp.formDeleteData(formId) 当动画的开始完成时，此事件将被触发。 |
|
| 3 | myApp.formStoreData(formId, formJSON) 关闭动画时，此事件将被触发。 |
|
例子 (Example)
以下示例演示了使用表单存储JavaScript API将数据存储在Framework7中的本地存储中 -
<!DOCTYPE html>
<html>
<head>
<meta name = "viewport" content = "width = device-width, initial-scale = 1,
maximum-scale = 1, minimum-scale = 1, user-scalable = no, minimal-ui" />
<meta name = "apple-mobile-web-app-capable" content = "yes" />
<meta name = "apple-mobile-web-app-status-bar-style" content = "black" />
<title>Form storage JavaScript API</title>
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.min.css" />
<link rel = "stylesheet"
href = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/css/framework7.ios.colors.min.css" />
</head>
<body>
<div class = "views">
<div class = "view view-main">
<div class = "pages">
<div data-page = "home" class = "page navbar-fixed">
<div class = "navbar">
<div class = "navbar-inner">
<div class = "left"> </div>
<div class = "center">Form Storage API</div>
<div class = "right"> </div>
</div>
</div>
<div class = "page-content">
<form id = "myform" class = "list-block store-data">
<ul>
<li>
<div class = "item-content">
<div class = "item-inner">
<div class = "item-title label">Name</div>
<div class = "item-input">
<input type = "text" name = "name" placeholder = "Enter your name">
</div>
</div>
</div>
</li>
<li>
<div class = "item-content">
<div class = "item-inner">
<div class = "item-title label">E-mail</div>
<div class = "item-input">
<input type = "email" name = "email" placeholder = "Enter your e-mail">
</div>
</div>
</div>
</li>
<li>
<div class = "item-content">
<div class = "item-inner">
<div class = "item-title label">Gender</div>
<div class = "item-input">
<select name = "gender">
<option value = "male" selected>Male</option>
<option value = "female">Female</option>
</select>
</div>
</div>
</div>
</li>
<li>
<div class = "item-content">
<div class = "item-inner">
<div class = "item-title label">Switch</div>
<div class = "item-input">
<label class = "label-switch">
<input type = "checkbox" name = "switch" value = "yes" />
<div class = "checkbox"></div>
</label>
</div>
</div>
</div>
</li>
</ul>
</form>
<div class = "content-block">
<p><a href = "#" class = "button button-fill button-round color-blue get-storage-data">Get Data</a></p>
<p><a href = "#" class = "button button-fill button-round color-red delete-storage-data">Delete Data</a></p>
<p><a href = "#" class = "button button-fill button-round color-green save-storage-data">Save Data</a></p>
</div>
</div>
</div>
</div>
</div>
</div>
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/framework7/1.4.2/js/framework7.min.js"></script>
<script>
var myApp = new Framework7();
var $$ = Dom7;
$$('.get-storage-data').on('click', function() {
var storedData = myApp.formGetData('myform');
if(storedData) {
alert(JSON.stringify(storedData));
} else {
alert('Yet there is no stored data for this form. Please try to change any field')
}
});
$$('.delete-storage-data').on('click', function() {
var storedData = myApp.formDeleteData('myform');
alert('Form data is deleted')
});
$$('.save-storage-data').on('click', function() {
var storedData = myApp.formStoreData('myform', {
'name': 'William Smith',
'email': 'williamsmith@xnip.cn',
'gender': 'male',
'switch': ['yes'],
});
alert('Form data is replaced, refresh the browser to reflect the changes')
});
</script>
</body>
</html>
输出 (Output)
让我们执行以下步骤，看看上面给出的代码是如何工作的 -
将上面给出的HTML代码保存为服务器根文件夹中的forms_storage_javascript.html文件。
以http://localhost/forms_storage_javascript.html打开此HTML文件，输出显示如下。
当您在表单中输入详细信息并单击“获取数据”按钮时，所有字段值都将转换为JSON格式并显示给您。
单击“保存数据”按钮后，表单数据将保存在本地存储中。
单击“删除数据”按钮后，将删除所有表单数据。