dojo小例子（30）FilteringSelect至少输入3个字才会触发查询

declare("MyFilteringSelect", FilteringSelect, {
// custom min input character count to trigger search
minKeyCount: 3,

// override search method, count the input length
_startSearch: function (/*String*/key) {
if (!key || key.length < this.minKeyCount) {
this.closeDropDown();
return;
}
this.inherited(arguments);
}
});

searchDelay
Delay in milliseconds between when user types something and we start searching based on that value