如果 2 个 select 框相互匹配并自动 select 第二个选项不匹配,我该如何制作它们?
How do I make 2 select boxes to dismiss each other if they mach and automatically select the second option to not match?
如何通过自动 select 选择第二个选项,使 2 个 select 框在匹配时相互消除?
我希望它而不是 "alert" 具有一项功能,当它们匹配时,自动将 select 选项框之一上的一个选项更改为第二个选项。
如果我可以保留警报并让它自动更改,那将是理想的,但如果不能保留警报,我接受。
JavaScript
<script src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
<script type='text/javascript'>
$(window).load(function(){
$(function () {
'use strict';
$('.OBSMatch').on('change', function (event) {
var selectedValue = $(event.currentTarget).val();
var matchedDropdowns = $('.OBSMatch').filter(function (index) {
return $(this).val() === selectedValue;
});
if (matchedDropdowns.length > 1) {
alert("OBS! You cannot use it, because it matches each other!")
}
})
})
});
</script>
HTML
<select name="LangF1" class="OBSMatch">
<option value="zh-CN">Chinese (Simplified)</option>
<option selected value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<select name="LangF2" class="OBSMatch">
<option value="zh-CN">Chinese (Simplified)</option>
<option value="en">English</option>
<option selected value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
更新: 我从完整代码中添加了这个更新,因为以前的好答案因为这个切换选项语言的按钮而无法正常工作。
<script language="JavaScript">
function getSelectedOption( elem ) {
return elem.options[elem.selectedIndex].value;
}
function setSelectedOption( elem, value ) {
for (let i = 0; i < elem.options.length; i++) {
elem.options[i].selected = value === elem.options[i].value;
}
}
function swapByOptionValue( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = getSelectedOption( elem1 ),
selectedOption2 = getSelectedOption( elem2 );
setSelectedOption( elem1, selectedOption2 );
setSelectedOption( elem2, selectedOption1 );
}
function swapBySelectedIndex( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = elem1.selectedIndex;
elem1.selectedIndex = elem2.selectedIndex;
elem2.selectedIndex = selectedOption1;
}
</script>
<input type="button" id="SwitchLang" onClick="swapByOptionValue('select[name=\'LangF1\']', 'select[name=\'LangF2\']');" value=" Swap ▲▼ Language ">
您要的是 UI,它允许用户将 UI 置于非法状态,发出警报,并尝试使事情合法化。
这真的不是一个伟大的UI。
如果可能的话,应该阻止用户将 UI 置于非法状态,这样就不需要警告也不需要更正任何东西。这样的策略在这里是非常可能的。
基本规则相当简单。更改 select 菜单时:
- 与此菜单的当前 selection 相对应的其他菜单应该被禁用。
- 应启用其他菜单的其他选项。
- 任何最初禁用的选项都需要防止被启用。
var $menus = $('.OBSMatch').on('change', function(event) {
$menus.not(this).find('option').filter(function(index, opt) {
return opt.value === event.target.value;
}).prop('disabled', true) // disable the other menu's option corresponding to this menu's selection
.siblings().not('._protected').prop('disabled', false); // enable the other menu's options except any that are protected.
});
$menus.find('option').filter(function(index, opt) {
return opt.disabled;
}).addClass('_protected'); // protect any initially disabled options from being enabled
$menus.trigger('change'); // initialize everything
"Auto Detect" 可能需要作为特殊情况处理 - 我不确定。
或者,对于一组 3+ select 个菜单...
编辑:
两个菜单的select离子可以切换如下:
function switch_(selector) {
var $menus = $(selector);
var values = $menus.map(function() {
return this.value;
}).get().reverse(); // reverse() swaps the two values
$menus.each(function(i, menu) {
$(this).val(values[i]); // implement the switch
}).trigger('change'); // re-initialize everything
}
// call
switch_('.OBSMatch');
// so, assuming you have a #switch element :
$('#switch').on('click', function() {
switch_('.OBSMatch');
});
函数不能命名为switch
,这是一个javascript保留字;因此 switch_
您在找这样的东西吗?
这里的关键是,关于改变:
- 获取目标元素的值
- 获取相关值
select
- 如果值匹配,将目标元素的值更改为下一个选项
$(window).load(function() {
$(function() {
'use strict';
$('.OBSMatch').on('change', function(event) {
var selectedVal = $(event.currentTarget).val();
var relatedId = $(this).attr('data-related');
var $otherSelect = $('#' + relatedId);
var otherVal = $otherSelect.val();
if (selectedVal === otherVal) {
$(this).val($(this).find('option:selected').next().val());
// alert("OBS! You cannot use it, because it matches each other!");
}
})
})
});
// UPDATE: Added code from updated question to test solution along with rest of code:
function getSelectedOption( elem ) {
return elem.options[elem.selectedIndex].value;
}
function setSelectedOption( elem, value ) {
for (let i = 0; i < elem.options.length; i++) {
elem.options[i].selected = value === elem.options[i].value;
}
}
function swapByOptionValue( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = getSelectedOption( elem1 ),
selectedOption2 = getSelectedOption( elem2 );
setSelectedOption( elem1, selectedOption2 );
setSelectedOption( elem2, selectedOption1 );
}
function swapBySelectedIndex( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = elem1.selectedIndex;
elem1.selectedIndex = elem2.selectedIndex;
elem2.selectedIndex = selectedOption1;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="LangF1" class="OBSMatch" data-related="ddl2" id="ddl1">
<option value="zh-CN">Chinese (Simplified)</option>
<option selected value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="disabled" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<select name="LangF2" class="OBSMatch" data-related="ddl1" id="ddl2">
<option value="zh-CN">Chinese (Simplified)</option>
<option value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option selected value="disabled" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<!-- UPDATE: Added code from updated question to test solution along with rest of code: -->
<input type="button" id="SwitchLang" onClick="swapByOptionValue('select[name=\'LangF1\']', 'select[name=\'LangF2\']');" value=" Swap ▲▼ Language ">
如何通过自动 select 选择第二个选项,使 2 个 select 框在匹配时相互消除?
我希望它而不是 "alert" 具有一项功能,当它们匹配时,自动将 select 选项框之一上的一个选项更改为第二个选项。
如果我可以保留警报并让它自动更改,那将是理想的,但如果不能保留警报,我接受。
JavaScript
<script src="http://code.jquery.com/jquery-1.8.1.min.js"></script>
<script type='text/javascript'>
$(window).load(function(){
$(function () {
'use strict';
$('.OBSMatch').on('change', function (event) {
var selectedValue = $(event.currentTarget).val();
var matchedDropdowns = $('.OBSMatch').filter(function (index) {
return $(this).val() === selectedValue;
});
if (matchedDropdowns.length > 1) {
alert("OBS! You cannot use it, because it matches each other!")
}
})
})
});
</script>
HTML
<select name="LangF1" class="OBSMatch">
<option value="zh-CN">Chinese (Simplified)</option>
<option selected value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<select name="LangF2" class="OBSMatch">
<option value="zh-CN">Chinese (Simplified)</option>
<option value="en">English</option>
<option selected value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
更新: 我从完整代码中添加了这个更新,因为以前的好答案因为这个切换选项语言的按钮而无法正常工作。
<script language="JavaScript">
function getSelectedOption( elem ) {
return elem.options[elem.selectedIndex].value;
}
function setSelectedOption( elem, value ) {
for (let i = 0; i < elem.options.length; i++) {
elem.options[i].selected = value === elem.options[i].value;
}
}
function swapByOptionValue( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = getSelectedOption( elem1 ),
selectedOption2 = getSelectedOption( elem2 );
setSelectedOption( elem1, selectedOption2 );
setSelectedOption( elem2, selectedOption1 );
}
function swapBySelectedIndex( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = elem1.selectedIndex;
elem1.selectedIndex = elem2.selectedIndex;
elem2.selectedIndex = selectedOption1;
}
</script>
<input type="button" id="SwitchLang" onClick="swapByOptionValue('select[name=\'LangF1\']', 'select[name=\'LangF2\']');" value=" Swap ▲▼ Language ">
您要的是 UI,它允许用户将 UI 置于非法状态,发出警报,并尝试使事情合法化。
这真的不是一个伟大的UI。
如果可能的话,应该阻止用户将 UI 置于非法状态,这样就不需要警告也不需要更正任何东西。这样的策略在这里是非常可能的。
基本规则相当简单。更改 select 菜单时:
- 与此菜单的当前 selection 相对应的其他菜单应该被禁用。
- 应启用其他菜单的其他选项。
- 任何最初禁用的选项都需要防止被启用。
var $menus = $('.OBSMatch').on('change', function(event) {
$menus.not(this).find('option').filter(function(index, opt) {
return opt.value === event.target.value;
}).prop('disabled', true) // disable the other menu's option corresponding to this menu's selection
.siblings().not('._protected').prop('disabled', false); // enable the other menu's options except any that are protected.
});
$menus.find('option').filter(function(index, opt) {
return opt.disabled;
}).addClass('_protected'); // protect any initially disabled options from being enabled
$menus.trigger('change'); // initialize everything
"Auto Detect" 可能需要作为特殊情况处理 - 我不确定。
或者,对于一组 3+ select 个菜单...
编辑:
两个菜单的select离子可以切换如下:
function switch_(selector) {
var $menus = $(selector);
var values = $menus.map(function() {
return this.value;
}).get().reverse(); // reverse() swaps the two values
$menus.each(function(i, menu) {
$(this).val(values[i]); // implement the switch
}).trigger('change'); // re-initialize everything
}
// call
switch_('.OBSMatch');
// so, assuming you have a #switch element :
$('#switch').on('click', function() {
switch_('.OBSMatch');
});
函数不能命名为switch
,这是一个javascript保留字;因此 switch_
您在找这样的东西吗?
这里的关键是,关于改变:
- 获取目标元素的值
- 获取相关值
select
- 如果值匹配,将目标元素的值更改为下一个选项
$(window).load(function() {
$(function() {
'use strict';
$('.OBSMatch').on('change', function(event) {
var selectedVal = $(event.currentTarget).val();
var relatedId = $(this).attr('data-related');
var $otherSelect = $('#' + relatedId);
var otherVal = $otherSelect.val();
if (selectedVal === otherVal) {
$(this).val($(this).find('option:selected').next().val());
// alert("OBS! You cannot use it, because it matches each other!");
}
})
})
});
// UPDATE: Added code from updated question to test solution along with rest of code:
function getSelectedOption( elem ) {
return elem.options[elem.selectedIndex].value;
}
function setSelectedOption( elem, value ) {
for (let i = 0; i < elem.options.length; i++) {
elem.options[i].selected = value === elem.options[i].value;
}
}
function swapByOptionValue( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = getSelectedOption( elem1 ),
selectedOption2 = getSelectedOption( elem2 );
setSelectedOption( elem1, selectedOption2 );
setSelectedOption( elem2, selectedOption1 );
}
function swapBySelectedIndex( selector1, selector2 ) {
var elem1 = document.querySelector(selector1),
elem2 = document.querySelector(selector2),
selectedOption1 = elem1.selectedIndex;
elem1.selectedIndex = elem2.selectedIndex;
elem2.selectedIndex = selectedOption1;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<select name="LangF1" class="OBSMatch" data-related="ddl2" id="ddl1">
<option value="zh-CN">Chinese (Simplified)</option>
<option selected value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option value="disabled" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<select name="LangF2" class="OBSMatch" data-related="ddl1" id="ddl2">
<option value="zh-CN">Chinese (Simplified)</option>
<option value="en">English</option>
<option value="fr">French</option>
<option value="de">German</option>
<option value="ru">Russian</option>
<option value="es">Spanish</option>
<option selected value="disabled" disabled>—</option>
<option value="auto">Auto Detect</option>
</select>
<!-- UPDATE: Added code from updated question to test solution along with rest of code: -->
<input type="button" id="SwitchLang" onClick="swapByOptionValue('select[name=\'LangF1\']', 'select[name=\'LangF2\']');" value=" Swap ▲▼ Language ">