老师请教一下5-10中固定滚动标题,当不需要去偏移DOM的时候,let fixedTop=0,可是为什么this.fixedTop也是0呢?
diff (newVal) {
let fixedTop = (newVal > 0 && newVal < TITLE_HEIGHT) ? newVal - TITLE_HEIGHT : 0
if (this.fixedTop === fixedTop) {
return
}
this.fixedTop = fixedTop
this.$refs.fixed.style.transform = `translate3d(0,${fixedTop}px,0)`
}