[英]How to add multiple input values to a table with JavaScript?
I'm trying to do a basic exercise with JavaScript.我正在尝试使用 JavaScript 进行基本练习。 The goal of the exercise is to input some values and then show them into a table.
练习的目标是输入一些值,然后将它们显示在表格中。
The problem I have is is that when I enter first name as " a
", last name as " a
" and phone as " 6
", I get " aa6
", instead of " aa 6
".我遇到的问题是,当我输入名字为“
a
”,姓氏为“ a
”,电话为“ 6
”时,我得到的是“ aa6
”,而不是“ aa 6
”。 What can I do to fix that?我能做些什么来解决这个问题?
class clsperson { constructor(firstName, lastName, celephone) { this.firstName = firstName; this.lastName = lastName; this.celephone = celephone; } } var persons = []; function addClient() { var Person = new clsperson(document.getElementById("firstName").value, document.getElementById("lastName").value, document.getElementById("celephone").value); persons.push(Person); document.getElementById("firstName").value = ""; document.getElementById("lastName").value = ""; document.getElementById("celephone").value = ""; } function viewClients() { var tblClient = document.getElementById("tblClient"); for (var i = 0; i < persons.length; i++) { var tr = document.createElement("tr"); tblClient.appendChild(tr); tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].firstName))); tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].lastName))); tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].celephone))); } }
<h2>add client into a table</h2> <table> <tr> <td><input id="firstName" type="text" /></td> <td><input id="lastName" type="text" /></td> <td><input id="celephone" type="text" /></td> <td><input id="addClient" type="button" value="add" onclick="addClient()" /></td> <td><input id="viewClient" type="button" value="show" onclick="viewClients()" /></td> </tr> </table> <table id="tblClient"> <tr> <th><input type="text" value="first name" /></th> <th><input type="text" value="last name" /></th> <th><input type="text" value="celephone" /></th> </tr> </table>
You had a problem, because when you create each td
, it didn´t create.您遇到了问题,因为当您创建每个
td
,它并没有创建。 It created all inside a tr
它在
tr
创建了所有内容
Try it, it looks better.试试吧,看起来更好。
function viewClients() {
for (var i = 0; i < persons.length; i++) {
document.getElementById("tblClient").insertRow(-1).innerHTML = '<tr><td>' + persons[i].firstName + '</td>' + '<td>' + persons[i].lastName + '</td>' + '<td>' + persons[i].celephone + '</td></tr>';
}
}
The document.createElement("td").appendChild(document.createTextNode(persons[i].firstName))
line returns a text node and not an element. document.createElement("td").appendChild(document.createTextNode(persons[i].firstName))
行返回一个文本节点而不是一个元素。 So your appending only the text everytime you try to append the table cells to the row.因此,每次尝试将表格单元格附加到行时,您只附加文本。 Also, the new
<tr>
is being appended outside of the <tbody>
tag.此外,新的
<tr>
被附加在<tbody>
标签之外。
Instead you could use the insertRow
method on the <table>
element and the insertCell
on the <tr>
element to create new rows and cells.相反,您可以使用
<table>
元素上的insertRow
方法和<tr>
元素上的insertCell
来创建新的行和单元格。
Loop through each of your persons, like you already do.循环遍历你的每个人,就像你已经做的那样。 Then inside each loop, loop through the
person
object with a for...in
loop.然后在每个循环中,使用
for...in
循环遍历person
对象。 A for...of
might be better, but you seem to use old practices, so I'll just stick with it. for...of
可能会更好,但你似乎使用旧的做法,所以我会坚持下去。
Then for each property in the person
object, create a new cell and use the textContent
setter to set the value of the current property to the cell.然后为
person
对象中的每个属性创建一个新单元格并使用textContent
setter 将当前属性的值设置为单元格。
I understand that this might be a little daunting at first, so don't hesitate to ask questions about it.我知道一开始这可能有点令人生畏,所以不要犹豫,提出有关它的问题。
Keep on learning, you are doing great!继续学习,你做得很好!
class clsperson { constructor(firstName, lastName, celephone) { this.firstName = firstName; this.lastName = lastName; this.celephone = celephone; } } var persons = []; function addClient() { var Person = new clsperson(document.getElementById("firstName").value, document.getElementById("lastName").value, document.getElementById("celephone").value); persons.push(Person); document.getElementById("firstName").value = ""; document.getElementById("lastName").value = ""; document.getElementById("celephone").value = ""; } function viewClients() { var tblClient = document.getElementById('tblClient'); for (var i = 0; i < persons.length; i++) { var person = persons[i]; var row = tblClient.insertRow(); for (var key in person) { if (person.hasOwnProperty(key)) { var cell = row.insertCell(); cell.textContent = person[key] } } } }
<body dir="rtl"> <h2>add client into a table</h2> <table> <tr> <td><input id="firstName" type="text" /></td> <td><input id="lastName" type="text" /></td> <td><input id="celephone" type="text" /></td> <td><input id="addClient" type="button" value="add" onclick="addClient()" /></td> <td><input id="viewClient" type="button" value="show" onclick="viewClients()" /></td> </tr> </table> <table id="tblClient"> <tr> <th><input type="text" value="first name" /></th> <th><input type="text" value="last name" /></th> <th><input type="text" value="celephone" /></th> </tr> </table> </body>
Just break these lines:只需打破这些行:
tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].firstname)));
tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].lastName)));
tr.appendChild(document.createElement("td").appendChild(document.createTextNode(persons[i].celephone)));
-- to separate parts, since these commands don't return a 'td' element, but return a text node (you can check on your browsers inspector) -- 分隔部分,因为这些命令不返回'td'元素,而是返回文本节点(您可以在浏览器检查器上查看)
So, your final code will be:因此,您的最终代码将是:
function viewClients() {
var tblClient = document.getElementById("tblClient");
for (var i = 0; i < persons.length; i++) {
var tr = document.createElement("tr");
tblClient.appendChild(tr);
var td1 = document.createElement("td");
td1.appendChild(document.createTextNode(persons[i].firstName));
tr.appendChild(td1);
var td2 = document.createElement("td");
td2.appendChild(document.createTextNode(persons[i].lastName));
tr.appendChild(td2);
var td3 = document.createElement("td");
td3.appendChild(document.createTextNode(persons[i].celephone));
tr.appendChild(td3);
}
}
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