Function nextFrame

vue.js:10981–10985

(fn)

    //下一帧
    function nextFrame(fn) {
        raf(function () {
            raf(fn);
        });
    }
    //获取 真实dom addTransitionClass 记录calss类
    function addTransitionClass(el, cls) {
        var transitionClasses = el._transitionClasses || (el._transitionClasses = []);