javascript - 在 keyup/click 上查找表单的 ID 和值

Question

我有一个包含几种不同类型输入(复选框、文本、数字等)的表单我希望能够找到用户正在单击/键入的表单的当前元素的 ID 以及它们的值输入。

我目前令人惊讶地使用 undefined 作为值。我真的不知道从哪里开始(我不想使用 jQuery)

HTML

<form id = "myForm" >           
        <input type="text" id="name"  name="name"  placeholder ="Name" />       

        <input type="email" id="mail"   name="email" placeholder ="Email" />

        <input type="number" id="phoneNumber" name ="phone" placeholder = "Phone Number" />

        <label for ="emailFormat">Email Signup Format:</label>
        <select name="newsletter" id = "plain">
            <option value = "Plain">Plain Text</option>
            <option value = "HTML">HTML</option>
        </select>

        <label for="pets">Cars owned:</label>
        <input type = "checkbox" id="mini" class = "ck" name ="mini">I have a mini.
        <input type = "checkbox" id="motorbike" class = "ck" name ="motorbike">I have a motorbike.
        <input type = "checkbox" id="thundercar" class = "ck" name ="thundercar">I have a thundercar.
        <input type = "checkbox" id="brum" class = "ck" name ="brum">I have a brum.
        <input type = "checkbox" id="roadrunner" class = "ck" name ="roadrunner">I have a roadrunner.

       <button type="submit" id ="button">SUBMIT</button>
</form>

JavaScript

var form = document.getElementById("myForm");

form.addEventListener("keyup", store);
form.addEventListener("click",store);

function store() {
  console.log(this.id);
  console.log(this.value);
}

Answer 1

当将事件绑定(bind)到表单并依赖于事件冒泡时，this 将成为事件处理程序中的表单。

要获取触发事件的元素，您可以改用 event.target

function store(event) {
    console.log(event.target.id);
    console.log(event.target.value);
}

FIDDLE