Question

我需要在 Blazor 项目中设计按钮（我使用的是引导程序）。我在一个 Razor 页面上有 2 个按钮组。每组 3 到 4 个按钮。我想用Javascript来改变onclick函数的颜色按钮。

用户将单击组 1 中的任何按钮（单击将颜色更改为绿色时）并单击组 2 中的按钮，而不会取消选择组 1 中的按钮。
onclick 调用需要在此处 <div class="btn-group"> 因为我的按钮上已经有了 onclick<button type="button" class="btn btn-primary" @onclick="() => UpdateTheChart(13)">@Language.T37</button>

我在 CSS 中尝试过 :focus，但只能选择 1 个按钮。这是我的代码，为了测试目的，我去掉了 onclick in 按钮。

.btn:hover {
  font-weight: bold;
  color: white;
  /*green*/
  background-color: #85c995;
}

<div class="row">
  <div class="column" style="width:30%">
    <div class="btn-group">
      <button type="button" class="btn btn-primary" style="outline-color:red; ">Sunday</button>
      <button type="button" class="btn btn-primary">Tuesday</button>
      <button type="button" class="btn btn-primary">Friday</button>
    </div>
  </div>
  <div class="column" style="width:70%">
    <div class="btn-group">
      <button type="button" class="btn btn-primary">9 am</button>
      <button type="button" class="btn btn-primary">2 pm</button>
      <button type="button" class="btn btn-primary">5 pm</button>
      <button type="button" class="btn btn-primary">8 pm</button>
    </div>
  </div>
</div>

Answer 1

function switch_to_green(el){

  //Check clicked button is on the same group
  if(el.parentElement.getAttribute("data-group") == 1){
  //Get all buttons of group 1
  let g1_buttons = document.querySelectorAll('#group1 .btn');
  for(let i =0; i<g1_buttons.length;i++){
    //Remove green color from unselected buttons
    g1_buttons[i].classList.remove('green');
  }
  }else{
  //Get all buttons of group 2
  let g2_buttons = document.querySelectorAll('#group2 .btn');
  for(let i =0; i<g2_buttons.length;i++){
    //Remove green color from unselected buttons
    g2_buttons[i].classList.remove('green');
  }
  }
  //Add green color to the only selected one
  el.classList.add('green');

}

.btn:hover {
        font-weight: bold;
        color: white;
        /*green*/
        background-color: #85c995;
}
.btn.green{
    color: white;
    /*green*/
    background-color: #85c995;
}

<div class="row">
    <div class="column" style="width:30%">
        <div class="btn-group" id="group1" data-group="1">
            <button type="button" class="btn btn-primary" style="outline-color:red; " onclick="switch_to_green(this)">Sunday</button>
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">Tuesday</button>
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">Friday</button>
        </div>
    </div>
    <div class="column" style="width:70%">
        <div class="btn-group" id="group2" data-group="2">
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">9 am</button>
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">2 pm</button>
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">5 pm</button>
            <button type="button" class="btn btn-primary" onclick="switch_to_green(this)">8 pm</button>
        </div>
    </div>
</div>

如何选择按钮组并更改颜色？

1 个答案: