Javascript

1. $('#js-sample-1').on('click', '.btn', (e) => {
2.     const color = $(e.target).data('color');
3.  
4.     $(e.delegateTarget).css({
5.         backgroundColor: color
6.     });
7. });

HTML

1. <div id="js-sample-1">
2.   <span class="btn btn-execute" data-color="red">実行</span><br>
3.   <span class="btn btn-execute" data-color="blue">実行</span><br>
4.   <span class="btn btn-execute" data-color="yellow">実行</span>
5. </div>
6.  
7.