如何从选择框中获取值？

Question

I want to get the value of the selected option from the selected box by using JQuery but it ain't working.

I have tried a million ways to do it. Trying to get its text instead, tried to get the value from multiple ways. To know what is coming in my jquery variable.

 $(document).ready(function () { //First thing I tried var category = $('#category').val(); alert(Category); //Second thing I tried var category = $('#category').filter(":selected").val(); alert(Category); //Third thing I tried var category = $('#category').find(":selected").text(); alert(Category); //Fourth thing I tried var category = $('#category').find(":selected").val(); alert(Category); //Fourth thing I tried var category = document.getElementById('category').value; alert(Category); //Now directly taking the value of selected option by id alert($("#category :selected").attr('value')); //These are the code snippets I tried at different times so don't //think that I did this all a time which can obviously throw some //exception. });

 <select class="form-control" id="cateogry" name="category"> <option value="0" disabled selected>Choose Project Category</option> <option value="active">Active Project</option> <option value="drafted">Drafted Project</option> </select>

All the options I have given above and tried all of them one by one and put an alert to see what is it getting and the alert said undefined. What can I do?

Answer 1

Html code

<select class="form-control" id="cateogry" name="category">
     <option value="0" disabled selected>Choose Project Category</option>
     <option value="active">Active Project</option>
     <option value="drafted">Drafted Project</option>
</select>

jQuery code

  $('#cateogry').change(function (){

    let value=$(this).val();
    alert(value);

   });

Get for option selected

$( "#cateogry option:selected" ).val();

Answer 2

你的警报有类别（第一个字母大写），你的变量是类别（没有大写，你能确认拼写错误吗？也许你正在显示一个不存在的变量，你的一个尝试正在工作