如何使用 .appendChild 添加 div 包含纯 JavaScript 中的多个文本输入（无 JQuery）

Question

对于当前的实验，我正在尝试制作动态联系表。目标是让用户只需单击按钮即可添加和删除地址，并指示其类型。

我注意到，在使用 innerHTML 表单时，一旦使用新的添加或删除，已经包含值的表单就会丢失它们的值。这似乎是 innerHTML 的本质（this answer 帮助我理解了问题所在，还向我指出了 appendChild）。

但是我不知道如何添加复杂元素，例如包含多个文本 inputs 和 button 的 <div>。有什么方法可以实现与我正在做的相同的事情，或者防止其他形式在不使用 JQuery 的情况下丢失输入值？

我已经尝试为此创建一个 MCVE，在这里，还有一个 JS Fiddle 以节省时间。

工作 JS Fiddle 在这里：JSFiddle

var targetOutput = document.getElementById("myForm");
var addressOutput = document.getElementById("addresses");
var requiredAddress = 1;

addressRemoveButton = `<input type="button" value="Remove" name="address" onclick="removeDiv(this)">`;
addressMolecule = `<div class="content"><label>Type:</label>&#9;&#9;<input type="text" name="address['type'][]"><br>
                <label>Address Line 1:</label><input type="text" name="address['line1'][]"><br>
                <label>Address Line 2:</label><input type="text" name="address['line2'][]"><br>
                <label>City:</label><input type="text" name="address['city'][]"><br>
                <label>State:</label><input type="text" name="address['state'][]"><br>
                <label>Zipcode:</label><input type="text" name="address['zipcode'][]"><br>`

window.onload = function(event) {
  myFun('window');
}

function myFun(a) {
  var i;
  for (i = 0; i < requiredAddress; i++) {
    addAddress(false);

    //alert("Max: " + maxAddress + "Current: " + addressCount);
  }
}

function removeDiv(e) {
  e.parentNode.removeChild(e.previousSibling);
  e.parentNode.removeChild(e);
}

function addAddress(removable = true) {
  addressOutput.innerHTML += addressMolecule;
  if (removable == true) {
    addressOutput.innerHTML += addressRemoveButton;
  }
  addressOutput.innerHTML += `</div>`;
}

<body onload="myFun('body')">
  <form name="myForm" id="myForm">
    <div id="addresses">
      <input type="button" id="addressButton" value="Add More" name="address" onclick="addAddress()">
    </div>
  </form>
</body>

Answer 1

如果要在现有容器不丢失其数据的情况下插入另一个 HTML 字符串，请改用 insertAdjacentHTML：

addressOutput.insertAdjacentHTML('beforeend', addressMolecule);

var targetOutput = document.getElementById("myForm");
var addressOutput = document.getElementById("addresses");
var requiredAddress = 1;

addressRemoveButton = `<input type="button" value="Remove" name="address" onclick="removeDiv(this)">`;
addressMolecule = `<div class="content"><label>Type:</label>&#9;&#9;<input type="text" name="address['type'][]"><br>
            <label>Address Line 1:</label><input type="text" name="address['line1'][]"><br>
            <label>Address Line 2:</label><input type="text" name="address['line2'][]"><br>
            <label>City:</label><input type="text" name="address['city'][]"><br>
            <label>State:</label><input type="text" name="address['state'][]"><br>
            <label>Zipcode:</label><input type="text" name="address['zipcode'][]"><br>`

window.onload = function(event) {
  myFun('window');
}

function myFun(a) {
  var i;
  for (i = 0; i < requiredAddress; i++) {
    addAddress(false);

    //alert("Max: " + maxAddress + "Current: " + addressCount);
  }
}

function removeDiv(e) {
  e.parentNode.removeChild(e.previousSibling);
  e.parentNode.removeChild(e);
}

function addAddress(removable = true) {
  addressOutput.insertAdjacentHTML('beforeend', addressMolecule);
  if (removable == true) {
    addressOutput.insertAdjacentHTML('beforeend', addressRemoveButton);
  }
  addressOutput.insertAdjacentHTML('beforeend', `</div>`);
}

<body onload="return myFun('body')">
  <form name="myForm" id="myForm">

    <div id="addresses">

      <input type="button" id="addressButton" value="Add More" name="address" onclick="addAddress()">
    </div>

  </form>
</body>

如您所述，使用可能更好appendChild。创建一个 div，用所需的 HTML 填充它，并将其附加到容器：

function addAddress(removable = true) {
  const newDiv = document.createElement('div');
  newDiv.className = 'content';
  newDiv.innerHTML = addressMolecule; 
  addressOutput.appendChild(newDiv);
  if (removable) {
    const button = addressOutput.appendChild(document.createElement('button'));
    button.outerHTML = addressRemoveButton;
  }
}

var targetOutput = document.getElementById("myForm");
var addressOutput = document.getElementById("addresses");
var requiredAddress = 1;

addressRemoveButton = `<input type="button" value="Remove" name="address" onclick="removeDiv(this)">`;
addressMolecule = `<label>Type:</label>&#9;&#9;<input type="text" name="address['type'][]"><br>
            <label>Address Line 1:</label><input type="text" name="address['line1'][]"><br>
            <label>Address Line 2:</label><input type="text" name="address['line2'][]"><br>
            <label>City:</label><input type="text" name="address['city'][]"><br>
            <label>State:</label><input type="text" name="address['state'][]"><br>
            <label>Zipcode:</label><input type="text" name="address['zipcode'][]"><br>`

window.onload = function(event) {
  myFun('window');
}

function myFun(a) {
  var i;
  for (i = 0; i < requiredAddress; i++) {
    addAddress(false);

    //alert("Max: " + maxAddress + "Current: " + addressCount);
  }
}

function removeDiv(e) {
  e.parentNode.removeChild(e.previousSibling);
  e.parentNode.removeChild(e);
}

function addAddress(removable = true) {
  const newDiv = document.createElement('div');
  newDiv.className = 'content';
  newDiv.innerHTML = addressMolecule; 
  addressOutput.appendChild(newDiv);
  if (removable) {
    const button = addressOutput.appendChild(document.createElement('button'));
    button.outerHTML = addressRemoveButton;
  }
}

<body onload="return myFun('body')">
  <form name="myForm" id="myForm">

    <div id="addresses">

      <input type="button" id="addressButton" value="Add More" name="address" onclick="addAddress()">
    </div>

  </form>
</body>

如何使用 .appendChild 添加 div 包含纯 JavaScript 中的多个文本输入（无 JQuery）

How to use .appendChild to add div containing multiple text inputs in plain JavaScript (without JQuery)

javascript

dom-manipulation