javascript - 在表中显示数组对象

Question

我遇到的问题是，当我添加新 Actor 时，信息显示在不同的行中。看一下 onclick 函数。

我需要添加一个新 Actor 并将其显示在表格中，就像显示前两个 Actor 一样。

var actors, i;

var Info = [{
    firstName: "Jason",
    lastName: "Statham",
    birth: "July 26, 1967",
    gender: "Male",
    genre: "Action, Crime, Thriller"
}, {
    firstName: "Mark",
    lastName: "Wahlberg",
    birth: "June 5, 1971",
    gender: "Male",
    genre: "Action, Comedy, Drama"
}];

var displayActors = function(actors) {
    var str = "<table class='table'>";
    str += "<tr>";
    str += "<th>First Name</th><th>Last Name</th><th>Date of Birth</th><th>Gender</th><th>Genre</th>";
    str += "</tr>";
    for (i = 0; i < actors.length; i++) {
        str += "<tr>";
        str += "<td>" + actors[i].firstName + "</td>";
        str += "<td>" + actors[i].lastName + "</td>";
        str += "<td>" + actors[i].birth + "</td>";
        str += "<td>" + actors[i].gender + "</td>";
        str += "<td>" + actors[i].genre + "</td>";
        str += "</tr>";
    }
    str += "</table>";

    document.getElementById("actorGrid").innerHTML = str;
}
window.onload = function() {
    displayActors(Info);
}
var sub = document.getElementById("submit").onclick = function() {
    var fName = document.getElementById("fname").value;
    var lName = document.getElementById("lname").value;
    var dOb = document.getElementById("dob").value;

    var str = "";
    str += "<td>" + Info.push({
        firstName: fName
    }) + "</td>";
    str += "<td>" + Info.push({
        lastName: lName
    }) + "</td>";
    str += "<td>" + Info.push({
        birth: dOb
    }) + "</td>";
    //Info.push({firstName: fName}, {lastName: lName}, {birth: dOb});

    document.getElementById("actorGrid").innerHTML = str;

    displayActors(Info);

}

<label>First Name</label><br />
<input type="text" id="fname"/><br />
<label>Last Name</label><br />
<input type="text" id="lname"/><br />
<label>Date of Birth</label><br />
<input type="date" id="dob"/><br />
<form action="">
   <label>Gender:</label><br />
   Male<input type="radio" name="gender" value="Male" id="male"/>
   Female<input type="radio" name="gender" value="Female" id="female"/><br />
</form>
<form action="">
   <label>Genre:</label><br />
   <label>Action<input type="checkbox" id="action"/></label>
   <label>Adventure<input type="checkbox" id="adventure"/></label>
   <label>Thriller<input type="checkbox" id="thriller"/></label>
   <label>Drama<input type="checkbox" id="drama"/></label>
</form>
<br /><input type="button" id="submit" value="Add Actor" />
<hr>
<div id="actorGrid"></div>

Answer 1

您没有为 3 <td> 制作任何行您正在生成(即使您不需要最后 2 <td> 数据，它也应该是 5 <td> )。

我实际上完成了该表格，其中还包括性别和类型:

1. 二手createElement('tr')和appendChild()这就是为什么统计数据没有出现在表中的原因。您生成了 s 但没有 <tr>将它们放入。

2. 二手insertCell()填充<tr>与所需的<td>

3. 按照您的方式收集了所有表单数据，但我对最后两个数据字段执行了以下操作:

   3A。对于性别我使用:

     `document.querySelector('input[name="gender"]:checked').value;`
   

   3B。对于我使用的类型:

   • .elements HTMLCollection 收集form#genre (我在表单中添加了 #genre 和 [name="genre"])。

   • 循环遍历 genre.items().checked

   • 提取每个 genre.items().checked 的值

   • 生成一串结果。

4. 使用 addEventListener() 稍微更改了您的事件处理。现在 JavaScript 之神会善待你的代码。 :P

下面是一个工作示例，一个小缺陷是流派中的最后一项将有一个逗号 ,如果不是“戏剧”。文章最后提供了引用资料。

片段

var actors, i;


var Info = [{
  firstName: "Jason",
  lastName: "Statham",
  birth: "July 26, 1967",
  gender: "Male",
  genre: "Action, Crime, Thriller"
}, {
  firstName: "Mark",
  lastName: "Wahlberg",
  birth: "June 5, 1971",
  gender: "Male",
  genre: "Action, Comedy, Drama"
}];

var displayActors = function(actors) {
  var str = "<table class='table'>";
  str += "<tr>";
  str += "<th>First Name</th><th>Last Name</th><th>Date of Birth</th><th>Gender</th><th>Genre</th>";
  str += "</tr>";
  for (i = 0; i < actors.length; i++) {
    str += "<tr>";
    str += "<td>" + actors[i].firstName + "</td>";
    str += "<td>" + actors[i].lastName + "</td>";
    str += "<td>" + actors[i].birth + "</td>";
    str += "<td>" + actors[i].gender + "</td>";
    str += "<td>" + actors[i].genre + "</td>";
    str += "</tr>";
  }
  str += "</table>";

  document.getElementById("actorGrid").innerHTML = str;
}
window.onload = function() {
  displayActors(Info);
}
document.getElementById("submit").addEventListener('click', function() {
  var table = document.querySelector('.table');
  var tRow = document.createElement('tr');
  table.appendChild(tRow);
  var FN = tRow.insertCell(0);
  var LN = tRow.insertCell(1);
  var DOB = tRow.insertCell(2);
  var SEX = tRow.insertCell(3);
  var GEN = tRow.insertCell(4);
  var fName = document.getElementById("fname").value;
  var lName = document.getElementById("lname").value;
  var dOb = document.getElementById("dob").value;
  var gender = document.querySelector('input[name="gender"]:checked').value;
  var genre = document.getElementById("genre").elements;
  var gens = "",
    i;
  for (i = 0; i < genre.length; i++) {
    var g = genre.item(i);
    if (g.checked) {
      var story = g.value;
      if (i === genre.length - 1) {
        gens += story;
      } else {
        gens += story + ", ";
      }
    } else {
      gens += '';
    }
  }


  FN.innerHTML = fName;
  LN.innerHTML = lName;
  DOB.innerHTML = dOb;
  SEX.innerHTML = gender;
  GEN.innerHTML = gens;



}, false);

<label>First Name</label>
<br />
<input type="text" id="fname" />
<br />

<label>Last Name</label>
<br />
<input type="text" id="lname" />
<br />

<label>Date of Birth</label>
<br />
<input type="date" id="dob" />
<br />

<form action="">
  <label>Gender:</label>
  <br />Male
  <input type="radio" name="gender" value="Male" id="male" />Female
  <input type="radio" name="gender" value="Female" id="female" />
  <br />
</form>

<form id="genre" name="genre" action="">
  <label>Genre:</label>
  <br />
  <label>Action
    <input type="checkbox" id="action" value="Action" />
  </label>
  <label>Adventure
    <input type="checkbox" id="adventure" value="Adventure" />
  </label>
  <label>Thriller
    <input type="checkbox" id="thriller" value="Thriller" />
  </label>
  <label>Drama
    <input type="checkbox" id="drama" value="Drama" />
  </label>
</form>
<br />
<input type="button" id="submit" value="Add Actor" />
<hr>
<div id="actorGrid"></div>

引用文献

Traversing an HTML table with JavaScript and DOM Interfaces

How to get the value of a form element : check box and radio button

addEventListener