[英]How to get value of option of a select element and use it in a calculation?
[英]How to get the select element by option value
我正在尝试使用jquery通过选项值获取整个select元素,但没有得到它。 select元素的ID是动态的,尚未加载。 所以我不能使用id来获取select元素。 因此,尝试使用选项值。
这是我尝试获取的select元素的示例:-
<select sf-field-model="" id="{{form.formId}}_{{interp(form.formTabId,{'$index':$index, value: item}) || $index}}" ng-disabled="form.readonly" sf-changed="form" class="form-control input-sm c" schema-validate="form" ng-options="item.value as item.name group by item.group for item in form.titleMap" name="_value" ng-model="item['_value']">
<option value="?" selected="selected"></option>
<option label="TEST-1" value="string:TEST1">TEST-1</option>
<option label="TEST-2" value="string:TEST2">TEST-2</option>
<option label="TEST-3" value="string:TEST3">TEST-3</option>
<option label="TEST-4" value="string:TEST4">TEST-4</option>
<option label="TEST-5" value="string:TEST5">TEST-5</option>
</select>
我尝试了以下方法:
var testSelectorText = "select['option[value='?']']";
angular.element(document.querySelectorAll(testSelectorText));
该行使用jquery查找所需的select元素,并使用一个option
value
进行标识。
sel = $("select option[value='string:TEST2']").closest("select");
让我知道这是否不是您想要的。
// Find the option with known value // Find the closest 'select' sel = $("select option[value='string:TEST2']").closest("select"); // Print name to demonstrate we found the item console.log(sel.attr("name"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <select sf-field-model="" id="{{form.formId}}_{{interp(form.formTabId,{'$index':$index, value: item}) || $index}}" ng-disabled="form.readonly" sf-changed="form" class="form-control input-sm c" schema-validate="form" ng-options="item.value as item.name group by item.group for item in form.titleMap" name="_value" ng-model="item['_value']"> <option value="?" selected="selected"></option> <option label="TEST-1" value="string:TEST1">TEST-1</option> <option label="TEST-2" value="string:TEST2">TEST-2</option> <option label="TEST-3" value="string:TEST3">TEST-3</option> <option label="TEST-4" value="string:TEST4">TEST-4</option> <option label="TEST-5" value="string:TEST5">TEST-5</option> </select>
如果要通过options
值查找选择,请尝试以下操作:
$("select option[value='string:TEST3']").parent();
演示
var testSelectorText = $("select option[value='string:TEST3']").parent(); console.log(testSelectorText.attr("id"))
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <select sf-field-model="" id="{{form.formId}}_{{interp(form.formTabId,{'$index':$index, value: item}) || $index}}" ng-disabled="form.readonly" sf-changed="form" class="form-control input-sm c" schema-validate="form" ng-options="item.value as item.name group by item.group for item in form.titleMap" name="_value" ng-model="item['_value']"> <option value="?" selected="selected"></option> <option label="TEST-1" value="string:TEST1">TEST-1</option> <option label="TEST-2" value="string:TEST2">TEST-2</option> <option label="TEST-3" value="string:TEST3">TEST-3</option> <option label="TEST-4" value="string:TEST4">TEST-4</option> <option label="TEST-5" value="string:TEST5">TEST-5</option> </select>
这就是我最近用来做的。
$('option[value="string:TEST1"]').closest('select')
设置class
选择
<select class='myClass' sf-field-model="" id="{{form.formId}}_{{interp(form.formTabId,{'$index':$index, value: item}) || $index}}" ng-disabled="form.readonly" sf-changed="form" class="form-control input-sm c" schema-validate="form" ng-options="item.value as item.name group by item.group for item in form.titleMap" name="_value" ng-model="item['_value']">
<option value="?" selected="selected"></option>
<option label="TEST-1" value="string:TEST1">TEST-1</option>
<option label="TEST-2" value="string:TEST2">TEST-2</option>
<option label="TEST-3" value="string:TEST3">TEST-3</option>
<option label="TEST-4" value="string:TEST4">TEST-4</option>
<option label="TEST-5" value="string:TEST5">TEST-5</option>
</select>
<button onclick="callMe()">get Value</button>
如下的脚本
function callMe()
{
var value = $("select.myClass").val();
console.log(value);
}
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