个回答

• wllzdh

  2020-08-06 09:18:05

  <p class="p">hello</p>

  document.querySelector(".p").style.color="blue";

  0

• weixin_慕勒2196315

  2020-03-21 21:40:09

  <p class="my">hello</p>

  document.getElementsByClassName('my')[0].style.color = 'blue';

  
  

  0

• 慕勒215309

  2020-03-16 12:02:50

  <p class="my">hello</p>

  document.getElementsByClassName('my')[0].style.color = 'red';

  1