javascript - js动态添加字段到表中

Question

我有显示在 HTML 表格中的 JSON 数据。我有单独的输入字段，例如对象中的相同键(名字、姓氏、电子邮件、电话号码)和“添加行”按钮。

我需要在输入字段中输入值，然后当我单击“添加行”按钮时，输入字段应附加到表中。

我可以显示表中的数据，但无法将新数据附加到表中。我还需要验证这些字段。谁能帮忙解决这个问题吗？

 var obj=[{Firstname:"Bob",Lastname:"Mayer",Email:"bob@mayer.com",Number: "123456789"},         {Firstname:"Steven",Lastname:"Spil",Email:"steven@spill.com",Number: "987654321"},         {Firstname:"Paul",Lastname:"Taucker",Email:"paul@tack.com",Number: "578954321"}];

var form = document.createElement('form');
document.body.appendChild(form);

var table = document.createElement("table");
table.setAttribute("id", "myTable");
form.appendChild(table);

var row = document.createElement("tr");
table.appendChild(row);
Object.keys(obj[0]).forEach(function(val) {
  var cell = document.createElement("th");
  row.appendChild(cell);
  cell.innerHTML = "Sl.No";
  cell.innerHTML = val;
  cell.style.border = '1px solid #ccc';
});

for (var i = 0; i < obj.length; i++) {
  var row = document.createElement("tr");
  table.appendChild(row);
  for (key in obj[i]) {
    var cell = document.createElement("td");
    row.appendChild(cell);
    cell.innerHTML = obj[i][key];
    cell.style.border = '1px solid #ccc';
  }
}

var addForm = document.createElement('div');
form.appendChild(addForm);

var checkbox = document.createElement('input');
checkbox.type = "checkbox";

var input = document.createElement('input');
input.type = "text";
input.id = "firstName";
input.placeholder = "Firstname";
addForm.appendChild(input);

var input1 = document.createElement('input');
input1.type = "text";
input.id = "lastName";
input1.placeholder = "Lastname";
addForm.appendChild(input1);

var input2 = document.createElement('input');
input2.type = "email";
input.id = "emailId";
input2.placeholder = "Email";
addForm.appendChild(input2);

var input3 = document.createElement('input');
input3.type = "number";
input.id = "phNum";
input3.placeholder = "Number";
addForm.appendChild(input3);

var btnSave = document.createElement('button');
btnSave.innerHTML = "Save";

var btnEdit = document.createElement('button');
btnEdit.innerHTML = "Edit";

var btnClick = document.createElement('input');
btnClick.type = "button";
btnClick.value = "Add Row";
btnClick.onclick = addTable;
form.appendChild(btnClick);

var addTable = function() { 
  var fn = document.getElementById("firstName").value;
  var ln = document.getElementById("lastName").value;
  var mail = document.getElementById("emailId").value;
  var num = document.getElementById("phNum").value;
};

JsFiddle

Answer 1

你可以检查一次 fiddle( https://jsfiddle.net/mco8wzev/9/ ) 吗？下面是代码

var obj=[{Firstname:"Bob",Lastname:"Mayer",Email:"bob@mayer.com",Number: "123456789"},
     {Firstname:"Steven",Lastname:"Spil",Email:"steven@spill.com",Number: "987654321"},
     {Firstname:"Paul",Lastname:"Taucker",Email:"paul@tack.com",Number: "578954321"}];

var form = document.createElement('form');
document.body.appendChild(form);

var table = document.createElement("table");
table.setAttribute("id", "myTable");
form.appendChild(table);

var row = document.createElement("tr");
table.appendChild(row);
Object.keys(obj[0]).forEach(function(val) {
var cell = document.createElement("th");
row.appendChild(cell);
cell.innerHTML = "Sl.No";
cell.innerHTML = val;
cell.style.border = '1px solid #ccc';
});

for (var i = 0; i < obj.length; i++) {
var row = document.createElement("tr");
table.appendChild(row);
for (key in obj[i]) {
var cell = document.createElement("td");
row.appendChild(cell);
cell.innerHTML = obj[i][key];
cell.style.border = '1px solid #ccc';
}
}

var addForm = document.createElement('div');
form.appendChild(addForm);

var checkbox = document.createElement('input');
checkbox.type = "checkbox";

var input = document.createElement('input');
input.type = "text";
input.placeholder = "Firstname";
input.class = "Firstname";
addForm.appendChild(input);

var input1 = document.createElement('input');
input1.type = "text";
input1.placeholder = "Lastname";
input1.class = "Lastname";
addForm.appendChild(input1);

var input2 = document.createElement('input');
input2.type = "email";
input2.placeholder = "Email";
input2.class = "Email";
addForm.appendChild(input2);

var input3 = document.createElement('input');
input3.type = "number";
input3.placeholder = "Number";
input3.class = "Number";
addForm.appendChild(input3);

var btnSave = document.createElement('button');
btnSave.innerHTML = "Save";

var btnEdit = document.createElement('button');
btnEdit.innerHTML = "Edit";

var addTable = function() { 
var row = document.createElement("tr");
table.appendChild(row);
var cell = document.createElement("td");
row.appendChild(cell);
cell.innerHTML = input.value;
cell.style.border = '1px solid #ccc';
var cell = document.createElement("td");
row.appendChild(cell);
cell.innerHTML = input1.value;
cell.style.border = '1px solid #ccc';
var cell = document.createElement("td");
row.appendChild(cell);
cell.innerHTML = input2.value;
cell.style.border = '1px solid #ccc';
var cell = document.createElement("td");
row.appendChild(cell);
cell.innerHTML = input3.value;
cell.style.border = '1px solid #ccc';
};
var btnClick = document.createElement('input');
btnClick.type = "button";
btnClick.value = "Add Row";
btnClick.onclick = addTable;
form.appendChild(btnClick);

希望它可以帮助你...addTable函数仍然需要优化..完成后我会更新..意味着你也可以尝试..