Javascript：如何在不用 JQuery 的情况下以编程方式更改 <input> 后发送事件

此代码片段将以编程方式更改输入，然后分派 input 事件，该事件将告诉页面上运行的 javascript 代码输入已更改。

dispatch_input_event.js

let myinput = document.querySelector("input#myinput");
// 设置值
myinput.value = "newvalue";
// 模拟 input 事件
myinput.dispatchEvent(new Event('input', {
    bubbles: true,
    cancelable: true,
}));

let myinput = document.querySelector("input#myinput");
// 设置值
myinput.value = "newvalue";
// 模拟 input 事件
myinput.dispatchEvent(new Event('input', {
    bubbles: true,
    cancelable: true,
}));

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