原生JS:
var dom = document.getElementsByClassName('dtd')
for(var i=0,len=dom.lengthi<leni++){
dom[i].style.color = 'red'
}Jquery
$('.dtd').css({color:'red'})
原生JS:
var dom = document.getElementsByClassName('dtd')
for(var i=0,len=dom.lengthi<leni++){
dom[i].style.color = 'red'
}Jquery
$('.dtd').css({color:'red'})