css3实现点击提交按钮加载进度条动画特效.zip

js代码 [removed] const button = document.querySelector('.button'); const submit = document.querySelector('.submit'); function toggleClass() { this.classList.toggle('active'); } function addClass() { this.classList.add('finished'); } button.addEventListener('click', toggleClass); button.addEventListener('transitionend', toggleClass); button.addEventListener('transitionend', addClass);[removed] </body>