用jquery怎么选择单选框中被选中的那一项？

用jquery怎么选择单选框中被选中的那一项？比如下面，被选中的是option1，用jquery怎么选择并获取这一项的value呢？

<div class="radio">
    <label>
      <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
      Option1
    </label>
  </div>
  <div class="radio">
    <label>
      <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
      Option2
    </label>
  </div>

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$("input[type='radio']:checked").val()

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$('input[name=optionsRadios]:checked').val();

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$("inputname='optiinRadio'

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$(input[name=optionsRadios]:checked)

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$("input:radio[name='optionsRadios']:checked").val();

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https://api.jquery.com/selected-selector/

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$('input[name="optionsRadios"]:checked').attr('value')建议遵循，HTML嵌套规则

  <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
  <label>Option1</label>
   http://www.admin10000.com/document/4894.html

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$('.radio :radio:checked')

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其实可以用prop()方法来进行获取

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$('input[name=optionsRadios]:checked').val();