当用户单击按钮时从数组中删除对象

Question

我正在尝试将用户选择的项目存储到一个对象中，这样当用户单击“删除按钮”时，它也会从我的对象中删除该项目。我似乎遇到了一个错误，其中只有我的数组中的第一个对象将被删除，没有别的。我可以帮忙吗？

每个 li 的 data-id 值为 i，其中 i 是一个整数，用户添加到列表中的每个项目都会递增一次，例如： 用户点击添加

数据ID：1

用户点击添加

数据ID：2

等等等等，目前当用户点击remove...它只会删除id:0的对象。但是点击列表中的任何其他项目都不会影响executiveDataArr

编辑：包括我的 html 文件，这是一个 Python Flask 应用程序，我使用 Jinja 模板以及 Wtforms 生成表单，因为我有一个动态选择字段，它使用我的数据库从该数据库中提取练习名称用户从中挑选来构建例程。

createRoutine.html

{% extends 'profileSignedInBase.html' %}

{% block content %}
<div>
  <div id="media">
    <div>
      <form action="/workoutroutines">
        {{form.hidden_tag()}}


        {% for field in form if field.widget.input_type != 'hidden' %}

        {{ field(placeholder=field.label.text) }}
        {% endfor %}


        <button id="createBtn">CREATE</button>
      </form>

      <div>

        <button id="addBtn">Add Exercise To List</button>
      </div>


      <h1>This is what you have planned for your routine</h1>
      <ol id="routineWishlist">

      </ol>
    </div>
  </div>
  <script src="/static/addExercise.js"></script>
  {% endblock %}

addExercise.JS

let jsonData = {}
let exerciseDataArr = []
let i = 0;

// generate list of items the user has selected for their workout
    document.querySelector("#media").addEventListener("click", function (e) {

//Add Item to 
  if (e.target.id == "addBtn") {
    e.preventDefault();
    var exerciseValue = $('#exerciseChoices').find(":selected").text();
    var workoutName = $('#workoutName').val();
    var workoutDescription = $('#description').val();

    if (workoutName == "") {
      console.log("please fill out all data")
      alert("please add a name")
      return;
    }
    if (workoutDescription == "") {
      console.log("please fill out all data")
      alert("please add a description")
      return;
    }
    console.log("You clicked on the Add button")
    var li = document.createElement("li");
    var div = document.createElement("div")
    var remove = document.createElement("button");
    li.setAttribute("data-id", i)
    div.setAttribute("id", `exercise${i}`)
    remove.setAttribute("id", "removeBtn");

    remove.innerText = 'Remove';


    try {
      jsonData['name'] = workoutName;
      jsonData['description'] = workoutDescription;
      exerciseDataArr.push({ 'exercise': exerciseValue,
     id: i})
    } catch (error) {
      console.error(error)
    }


    i++;
    console.log(jsonData)      //{"name": "workout 1","description": "My favorites"}
    console.log(exerciseDataArr) //After adding 2 exercises to the list {"exercise": "2 Handed Kettlebell Swing","id": 0}{"exercise": "2 Handed Kettlebell Swing","id": 1}


    var t = document.createTextNode(exerciseValue);
    div.append(li)
    li.append(remove);
    li.appendChild(t);
    document.querySelector("#routineWishlist").appendChild(div);

  }
  if (e.target.id === "removeBtn") {
    e.preventDefault();


    
    exerciseName = $(e.target).closest('div').attr('id');
    exerciseOrder = parseInt($(e.target).closest('li').attr('data-id'));
    console.log("remove " + typeof(exerciseOrder) + " " + exerciseOrder + " at " + exerciseName )
    console.log("inside " + typeof(exerciseDataArr)) //object
    //remove from displayed list of exercises
    $(e.target).closest('div').remove()

    // remove from object
    for(let val in exerciseDataArr){
      val = parseInt(val)
      console.log(`id: ${val}`)
      // if the exerciseDataArr contains id: exerciseOrder delete from exerciseDataArr
      if(exerciseDataArr.hasOwnProperty("id") == exerciseOrder   ){// <---does not activate unless the first 'li' is clicked. 
        console.log("the object has been found, now delete it")
        delete exerciseDataArr[exerciseOrder]
        val = undefined;
      }
    }
    console.log(exerciseDataArr)

  }

Answer 1

您可以发布更多代码吗？如果可能也发布 HTML 以及代码中的 exerciseDataArr 是什么，没有明确解释