此应用程序使用 JavaScript 动态添加、编辑和删除表中的行。
只是找不到只有单击“编辑”时才会出现“保存”按钮的解决方案。当前状态是添加一行后,那里有一个“保存”按钮,但无法使用。我尝试在 add_row() 函数 var row 中删除此输入标记:
<input type='button' id='save_button"+table_len+"' value='Save' class='save' onclick='save_row("+table_len+")'>
但是当您编辑时,保存按钮也将不可用。
请查看我的代码,**非常感谢**
<html>
<head>
<script type="text/javascript">
function edit_row(no)
{
document.getElementById("edit_button"+no).style.display="none";
document.getElementById("save_button"+no).style.display="block";
var name=document.getElementById("name_row"+no);
var country=document.getElementById("country_row"+no);
var age=document.getElementById("age_row"+no);
var name_data=name.innerHTML;
var country_data=country.innerHTML;
var age_data=age.innerHTML;
name.innerHTML="<input type='text' id='name_text"+no+"' value='"+name_data+"'>";
country.innerHTML="<input type='text' id='country_text"+no+"' value='"+country_data+"'>";
age.innerHTML="<input type='text' id='age_text"+no+"' value='"+age_data+"'>";
}
function save_row(no)
{
var name_val=document.getElementById("name_text"+no).value;
var country_val=document.getElementById("country_text"+no).value;
var age_val=document.getElementById("age_text"+no).value;
document.getElementById("name_row"+no).innerHTML=name_val;
document.getElementById("country_row"+no).innerHTML=country_val;
document.getElementById("age_row"+no).innerHTML=age_val;
document.getElementById("edit_button"+no).style.display="block";
document.getElementById("save_button"+no).style.display="none";
}
function delete_row(no)
{
document.getElementById("row"+no+"").outerHTML="";
}
function add_row()
{
var new_name=document.getElementById("new_name").value;
var new_country=document.getElementById("new_country").value;
var new_age=document.getElementById("new_age").value;
var table=document.getElementById("data_table");
var table_len=(table.rows.length)-1;
var row = table.insertRow(table_len).outerHTML="<tr id='row"+table_len+"'><td id='name_row"+table_len+"'>"+new_name+"</td><td id='country_row"+table_len+"'>"+new_country+"</td><td id='age_row"+table_len+"'>"+new_age+"</td><td><input type='button' id='edit_button"+table_len+"' value='Edit' class='edit' onclick='edit_row("+table_len+")'> <input type='button' id='save_button"+table_len+"' value='Save' class='save' onclick='save_row("+table_len+")'> <input type='button' value='Delete' class='delete' onclick='delete_row("+table_len+")'></td></tr>";
document.getElementById("new_name").value="";
document.getElementById("new_country").value="";
document.getElementById("new_age").value="";
}</script>
</head>
<body>
<div id="wrapper">
<table align='center' cellspacing=2 cellpadding=5 id="data_table" border=1>
<tr>
<th>Name</th>
<th>Country</th>
<th>Age</th>
</tr>
<tr id="row1">
<td id="name_row1">Name1</td>
<td id="country_row1">Country1</td>
<td id="age_row1">22</td>
<td>
<input type="button" id="edit_button1" value="Edit" class="edit" onclick="edit_row('1')">
<input type="button" id="save_button1" value="Save" class="save" onclick="save_row('1')">
<input type="button" value="Delete" class="delete" onclick="delete_row('1')">
</td>
</tr>
<tr id="row2">
<td id="name_row2">Name2</td>
<td id="country_row2">Country2</td>
<td id="age_row2">21</td>
<td>
<input type="button" id="edit_button2" value="Edit" class="edit" onclick="edit_row('2')">
<input type="button" id="save_button2" value="Save" class="save" onclick="save_row('2')">
<input type="button" value="Delete" class="delete" onclick="delete_row('2')">
</td>
</tr>
<tr id="row3">
<td id="name_row3">Name3</td>
<td id="country_row3">Country3</td>
<td id="age_row3">24</td>
<td>
<input type="button" id="edit_button3" value="Edit" class="edit" onclick="edit_row('3')">
<input type="button" id="save_button3" value="Save" class="save" onclick="save_row('3')">
<input type="button" value="Delete" class="delete" onclick="delete_row('3')">
</td>
</tr>
<tr>
<td><input type="text" id="new_name"></td>
<td><input type="text" id="new_country"></td>
<td><input type="text" id="new_age"></td>
<td><input type="button" class="add" onclick="add_row();" value="Add Row"></td>
</tr>
</table>
</div>
</body>
</html>
``
最佳答案
您可以删除保存按钮,例如,
const removeSaveBtns = () => {
const saveBtns = document.querySelectorAll('.save');
saveBtns.forEach((btn, i) => {
btn.style.display = "none";
})
}
并在加载时添加它并同时添加新行..
const removeSaveBtns = () => {
const saveBtns = document.querySelectorAll('.save');
saveBtns.forEach((btn, i) => {
btn.style.display = "none";
})
}
removeSaveBtns();
function edit_row(no)
{
document.getElementById("edit_button"+no).style.display="none";
document.getElementById("save_button"+no).style.display="block";
var name=document.getElementById("name_row"+no);
var country=document.getElementById("country_row"+no);
var age=document.getElementById("age_row"+no);
var name_data=name.innerHTML;
var country_data=country.innerHTML;
var age_data=age.innerHTML;
name.innerHTML="<input type='text' id='name_text"+no+"' value='"+name_data+"'>";
country.innerHTML="<input type='text' id='country_text"+no+"' value='"+country_data+"'>";
age.innerHTML="<input type='text' id='age_text"+no+"' value='"+age_data+"'>";
}
function save_row(no)
{
var name_val=document.getElementById("name_text"+no).value;
var country_val=document.getElementById("country_text"+no).value;
var age_val=document.getElementById("age_text"+no).value;
document.getElementById("name_row"+no).innerHTML=name_val;
document.getElementById("country_row"+no).innerHTML=country_val;
document.getElementById("age_row"+no).innerHTML=age_val;
document.getElementById("edit_button"+no).style.display="block";
document.getElementById("save_button"+no).style.display="none";
}
function delete_row(no)
{
document.getElementById("row"+no+"").outerHTML="";
}
function add_row()
{
var new_name=document.getElementById("new_name").value;
var new_country=document.getElementById("new_country").value;
var new_age=document.getElementById("new_age").value;
var table=document.getElementById("data_table");
var table_len=(table.rows.length)-1;
var row = table.insertRow(table_len).outerHTML="<tr id='row"+table_len+"'><td id='name_row"+table_len+"'>"+new_name+"</td><td id='country_row"+table_len+"'>"+new_country+"</td><td id='age_row"+table_len+"'>"+new_age+"</td><td><input type='button' id='edit_button"+table_len+"' value='Edit' class='edit' onclick='edit_row("+table_len+")'> <input type='button' id='save_button"+table_len+"' value='Save' class='save' onclick='save_row("+table_len+")'> <input type='button' value='Delete' class='delete' onclick='delete_row("+table_len+")'></td></tr>";
document.getElementById("new_name").value="";
document.getElementById("new_country").value="";
document.getElementById("new_age").value="";
removeSaveBtns();
}
<div id="wrapper">
<table align='center' cellspacing=2 cellpadding=5 id="data_table" border=1>
<tr>
<th>Name</th>
<th>Country</th>
<th>Age</th>
</tr>
<tr id="row1">
<td id="name_row1">Name1</td>
<td id="country_row1">Country1</td>
<td id="age_row1">22</td>
<td>
<input type="button" id="edit_button1" value="Edit" class="edit" onclick="edit_row('1')">
<input type="button" id="save_button1" value="Save" class="save" onclick="save_row('1')">
<input type="button" value="Delete" class="delete" onclick="delete_row('1')">
</td>
</tr>
<tr id="row2">
<td id="name_row2">Name2</td>
<td id="country_row2">Country2</td>
<td id="age_row2">21</td>
<td>
<input type="button" id="edit_button2" value="Edit" class="edit" onclick="edit_row('2')">
<input type="button" id="save_button2" value="Save" class="save" onclick="save_row('2')">
<input type="button" value="Delete" class="delete" onclick="delete_row('2')">
</td>
</tr>
<tr id="row3">
<td id="name_row3">Name3</td>
<td id="country_row3">Country3</td>
<td id="age_row3">24</td>
<td>
<input type="button" id="edit_button3" value="Edit" class="edit" onclick="edit_row('3')">
<input type="button" id="save_button3" value="Save" class="save" onclick="save_row('3')">
<input type="button" value="Delete" class="delete" onclick="delete_row('3')">
</td>
</tr>
<tr>
<td><input type="text" id="new_name"></td>
<td><input type="text" id="new_country"></td>
<td><input type="text" id="new_age"></td>
<td><input type="button" class="add" onclick="add_row();" value="Add Row"></td>
</tr>
</table>
</div>
关于javascript - 仅当我更新或编辑时,才会出现简单 CRUD 应用程序中的“保存”按钮,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/70006114/