用原型观察多个选择菜单 [英] observing multiple select menus with prototype
问题描述
我想观察多个选择菜单并使用原型响应它们的更改，但似乎只观察到第一个菜单.这是我的代码:
$('product_options').select('select').invoke("observe","change",optchange);如果在 product_options 中有 - 例如 - 3 个选择，那么它只观察第一个，我认为可能是因为调用，所以我尝试了这个:
$('product_options').select('select').each(function(sel){$(sel).observe("change",optchange);});还是不行，有什么想法有什么问题吗?
选择器绝对没有问题，因为 console.debug() 向我展示了所有的选择菜单
你检查过你的 JS 错误控制台了吗?以下工作正常:
<头><title>optchange</title><script type="text/javascript" src="prototype.js"></script><身体><div id="product_options"><select id="o0"><option>1</option><option>2</option></选择><select id="o1"><option>1</option><option>2</option></选择><select id="o3"><option>1</option><option>2</option></选择><script type="text/javascript">函数 optchange(e) {警报(选择更改")；}$('product_options').select('select').invoke("observe","change", optchange);</html>
I want to observe multiple select menus and respond to their changes using prototype but only the first menu seems to be observed. This is my code:
$('product_options').select('select').invoke("observe","change",optchange);
If there are - for example - 3 selects within product_options then it only observes the first, i thought it might be because of invoke so i then tried this:
$('product_options').select('select').each(function(sel){
$(sel).observe("change",optchange);
});
Still doesnt work though, any ideas whats wrong?
There's definitely nothing wrong with the selector as a console.debug() shows me all the select menus
Have you checked your JS error console? The below works just fine:
<html>
<head>
<title>optchange</title>
<script type="text/javascript" src="prototype.js"></script>
</head>
<body>
<div id="product_options">
<select id="o0">
<option>1</option>
<option>2</option>
</select>
<select id="o1">
<option>1</option>
<option>2</option>
</select>
<select id="o3">
<option>1</option>
<option>2</option>
</select>
</div>
<script type="text/javascript">
function optchange(e) {
alert("optchanged");
}
$('product_options').select('select').invoke("observe","change", optchange);
</script>
</body>
</html>
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