Ele
2019-07-03 21:24
change触发该事件是因为用户在该元素上进行了更改。
另一种选择是手动触发该事件，如下所示：
let $typess = $("#Typess")
$(".x").click(function(event) {
document.getElementById('Typess').selectedIndex = 1;
$typess.trigger("change");
})
$typess.on('change', function(event) {
console.log("Changed");
});<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="Typess">
<option>A</option>
<option>B</option>
</select>
<p>
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