我正在尝试读取通过自动完成获取的输入，并将其显示为警报。访问后，我得到未定义为警报，而不是通过labelinput访问的值。
ex.js文件如下
goog.require('goog.dom');
goog.require('goog.ui.LabelInput');
goog.require('goog.ui.ac');
goog.require('goog.events.EventType');
function autoComplete() {
var jobj = [{"cityname":"Bangalore","cityid":"1"},
{"cityname":"Bellary","cityid":"2"},
{"cityname":"Belgaum","cityid":"3"},
{"cityname":"Bidar","cityid":"4"},
{"cityname":"Mumbai","cityid":"5"},
{"cityname":"Munnar","cityid":"6"},
{"cityname":"Delhi","cityid":"7"},
{"cityname":"Diu/Daman","cityid":"8"}];
var li1 = new goog.ui.LabelInput("Enter City Name");
li1.render(goog.dom.getElement('d1'));
var array1 = new Array();
for (var i=0;i<jobj.length; i++)
{
array1[i] = jobj[i].cityname;
}
var ac2 = goog.ui.ac.createSimpleAutoComplete(
array1, goog.dom.getElement('d1'), false);
goog.events.listen(ac2,
goog.ui.ac.AutoComplete.EventType.UPDATE,
function() { var val2 = (goog.dom.getElement('d1').value);
alert(val2);
});
}
ex.html文件如下
<html>
<head>
<script src="../closure-library/closure/goog/base.js"></script> <!--My Closure Library Location -->
<script src="ex.js"></script>
</head>
<body onload="autoComplete();">
<style>
.ac-renderer {
position: absolute;
width: 300px;
background-color: #fff;
border: 1px solid;
}
</style>
<div id="d1">City   </div><br><br>
</body>
</html>
最佳答案
“ goog.dom.getElement（'d1'）”将返回一个div元素，该元素将没有值。调用时，LabelInput会在该元素内部呈现一个控件
li1.render(goog.dom.getElement('d1'));
您应该使用LabelInput类本身的getValue方法
li1.getValue()
或者如果您想访问在LabelInput渲染方法期间创建的Input元素，请调用
li1.getElement().value
资料来源：http://docs.closure-library.googlecode.com/git/class_goog_ui_LabelInput.html
关于javascript - 使用Google Closure从LabelInput访问数据，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/18230866/