当我在浏览器中执行此html代码时，我得到一个空白屏幕并且无法找到错误，尝试在线提供所有可能的备用代码，我应该在Ext.create（）之前定义一些内容吗？请帮忙。
<html>
<head>
<title>Combo Box</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href =
"https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/classic/theme-
classic/resources/theme-classic-all.css"
rel = "stylesheet" />
<script type = "text/javascript"
src = "https://cdnjs.cloudflare.com/ajax/libs/extjs/6.0.0/ext-all.js">
</script>
<script type="text/javascript">
Ext.onReady(function() { Ext.create({ //creating combobox
fullscreen: true,
xtype: 'container',
padding: 50,
layout: 'vbox',
items: [{
xtype: 'combobox', //set type to combobox
label: 'Choose State',
queryMode: 'local',
displayField: 'name',
valueField: 'abbr',
store: [
{ abbr: 'AL', name: 'Alabama' }, //list values in combobox
{ abbr: 'AK', name: 'Alaska' },
{ abbr: 'AZ', name: 'Arizona' }
]
}]
});
});
</script>
<body>
</body>
</html>
答案 0 :(得分：0)
您缺少 renderTo 属性。
示例：
Ext.onReady(function () {
Ext.create({ //creating combobox
fullscreen: true,
xtype: 'container',
padding: 50,
layout: 'vbox',
renderTo: Ext.getBody(),
items: [{
xtype: 'combobox', //set type to combobox
fieldLabel: 'Choose State',
queryMode: 'local',
displayField: 'name',
valueField: 'abbr',
store: Ext.create('Ext.data.Store', {
data: [{
abbr: 'AL',
name: 'Alabama'
}, //list values in combobox
{
abbr: 'AK',
name: 'Alaska'
}, {
abbr: 'AZ',
name: 'Arizona'
}
]
})
}]
});
});
此外，商店配置也在示例中得到纠正。