chore: add the topScrollPos prop to check pos when scroll top

src/components/InfiniteLoading.vue

@@ -81,9 +81,12 @@ function hasClass(element, className) {
 
 function restoreScrollPos() {
  if (this.lastHeight) {
- const vClientHeight = this.scrollParent.clientHeight;
+ let vPos = this.topScrollPos;
+ if (vPos <= 1) {
+ vPos *= this.scrollParent.clientHeight;
+ }
  const vOffset = this.scrollParent.scrollHeight - this.lastHeight;
- if (vOffset >= vClientHeight) {
+ if (vOffset >= vPos) {
  this.scrollParent.scrollTop = vOffset + this.distance;
  } else {
  this.scrollParent.scrollTop = this.distance + 1;
@@ -146,6 +149,16 @@ export default {
  infiniteWrapperClass: {
  type: String,
  },
+ /*
+ topScrollPos for direction is 'top'
+ pos = clientHeight * value when value in [0, 1]
+ pos = value when value > 1
+ */
+ topScrollPos: {
+ type: Number,
+ validator: value => value >= 0,
+ default: 1,
+ },
  },
  mounted() {
  this.scrollParent = this.getScrollParent();