如何使用 vanilla JS 或 Jquery 定位按钮以查看用户是否选择了它？

Question

这是按钮的 html 代码。 用户有 3 个选项，并且只能选择一个。

        <div data-role="fieldcontain">
          <fieldset data-role="controlgroup" data-type="horizontal">
              <legend>Camera Type:</legend>
              <button class="ui-shadow ui-button" id="btnDSLR">DSLR<span class="ui-icon ui-icon-home"></span></button>
              <button class="ui-shadow ui-button" id="btnPointAndShoot">Point & Shoot<span class="ui-icon ui-icon-home"></span></button>
              <button class="ui-shadow ui-button" id="btnNoCamara">No Camara<span class="ui-icon ui-icon-home"></span></button>
          </fieldset>
        </div>

我认为它应该是这样的：

//Check Camara Type.
    if (document.getElementById("btnDSLR").checked)
    {
      camara += "DSRL";
    }

我不知道如何检索用户选择了哪个选项。

谢谢！

Answer 1

像这样。

jQuery ：

 $(".ui-button").on("click",function(e) { const $tgt = $(this) console.log($tgt.attr("id"),$tgt.text()); })

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div data-role="fieldcontain"> <fieldset data-role="controlgroup" data-type="horizontal"> <legend>Camera Type:</legend> <button class="ui-shadow ui-button" id="btnDSLR">DSLR<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnPointAndShoot">Point & Shoot<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnNoCamara">No Camara<span class="ui-icon ui-icon-home"></span></button> </fieldset> <span id="which"></span> </div>

普通/Vanilla JS需要委托

 document.querySelector("fieldset[data-role=controlgroup]").addEventListener("click",function(e) { const tgt = e.target; if (tgt.parentNode.classList.contains("ui-button")) tgt = tgt.parentNode; // clicked the span if (tgt.classList.contains("ui-button")) { console.log(tgt.id,tgt.textContent); } })

 <div data-role="fieldcontain"> <fieldset data-role="controlgroup" data-type="horizontal"> <legend>Camera Type:</legend> <button class="ui-shadow ui-button" id="btnDSLR">DSLR<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnPointAndShoot">Point & Shoot<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnNoCamara">No Camara<span class="ui-icon ui-icon-home"></span></button> </fieldset> <span id="which"></span> </div>

Answer 2

您可以使用jquery简单地获取如下按钮的text

 $('.ui-button').click(function() { console.log( $(this).text() ); })

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div data-role="fieldcontain"> <fieldset data-role="controlgroup" data-type="horizontal"> <legend>Camera Type:</legend> <button class="ui-shadow ui-button" id="btnDSLR">DSLR<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnPointAndShoot">Point & Shoot<span class="ui-icon ui-icon-home"></span></button> <button class="ui-shadow ui-button" id="btnNoCamara">No Camara<span class="ui-icon ui-icon-home"></span></button> </fieldset> </div>