Web如果我的接口將 MyObject.type 定義為類型（常量）： 'orange' '蘋果'， 當我這樣做時，我收到一個錯誤：MyObject.type = e.currentTarget.value in the onChange 方法，因為它可以是任何字符串，即使我知道它總是會給出正確的答案，因為它是一個選擇下拉列表。 WebApr 12, 2024 · First, we need to set the initial state for the inputs. This can be represented in an object where each property corresponds with an input field. This is done through the use of the useState hook: const [state, setState] = useState({ name: '', email: '', message: '', termsAndConditions: false }) Form.jsx Set the initial state for the inputs.

Event target v currentTarget Building SPAs - Carl

WebFeb 15, 2024 · event.target tells where the event started. Suppose there’s an event which shows an alert on click of the element. This event has been attached to the body. Now when the user clicks on the strong... WebcurrentTarget 事件属性返回其监听器触发事件的节点，即当前处理该事件的元素、文档或窗口。 在捕获和起泡阶段，该属性是非常有用的，因为在这两个节点，它不同于 target 属性。 语法 event .currentTarget 实例 实例 下面的例子可获得哪个元素的监听器触发了事件： 菜鸟教程 … chinn ross on wye

事件触发 currentTarget 却为 null - 掘金 - 稀土掘金

WebThe currentTarget property on the event gives us access to the element that the event listener is attached to. On the other hand, the target property on the event gives us a reference to the element that triggered the event (could be a descendant). WebThe W3Schools online code editor allows you to edit code and view the result in your browser WebMar 3, 2024 · This tiny app contains 4 different buttons but we will only use a single function to handle the onClick events that fired when one of them clicked. The name of the clicked button will be displayed on the screen. We also call the preventDefault () method to prevent it from submitting the form. Here’s how it works: The Code 1. chinns 34th street fishery lisle il