問題的本質(zhì)是:document.getElementsByClassName(...)獲取的是一個數(shù)組,正確應(yīng)該是
document.getElementsByClassName(...)[0].addEventListener
問題的本質(zhì)是:document.getElementsByClassName(...)獲取的是一個數(shù)組,正確應(yīng)該是
document.getElementsByClassName(...)[0].addEventListener