Question

我有一个网页，我希望用户只从三个中的任何一个列表中选择项目。

 A    B    C
-A1  -B1  -C1
-A2  -B2  -C2
-A3  -B3  -C3

现在，用户必须只选择A，B或C中的项目（多个），而不能选择多个列表。例如：A1，A2，A3可以从A中选择，但是当选择B时，必须取消选择A下的项目。我想知道HTML或WTForms中是否存在这样的表单

Answer 1

If it has to be pure HTML, you'll have to take two steps. I think you might be talking about three Comboboxes. They are generated with the select command.

<select name="A">
    <option value="A1">A1</option>
    <option value="A2">A2</option>
</select>

To make only one of the three comboboxes active you could use a radio button set above:

<form>
  <input type="radio" name="list" value="A" checked> A<br>
  <input type="radio" name="list" value="B"> B<br>
  <input type="radio" name="list" value="C"> C
</form>

then change the visibility of the Comboboxes based on the radio button picked.

从任意三个列表中选择项目

1 个答案: