html5 checkbox

 https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox

https://www.w3schools.com/tags/att_input_type_checkbox.asp

http://yhhuang1966.blogspot.com/2014/06/checkbox.html

https://ithelp.ithome.com.tw/questions/10200990

https://www.itread01.com/content/1543039113.html

 

<p>Choose your monster's features:</p>

<div>

  <input type="checkbox" id="scales" name="scales"

         checked>

  <label for="scales">Scales</label>

</div>

<div>

  <input type="checkbox" id="horns" name="horns">

  <label for="horns">Horns</label>

</div>