adjust whether element reach / leave the edge of viewport. Also can set offset.
new ArrivalListener({
// options
});| 参数 | 类型 | 默认值 | 描述 |
|---|---|---|---|
| el | dom | (necessary) | element needs to listen to |
| offsetTopEnterBottom | number (px / percent) / function | 0 | offset when element's top enter viewport's bottom |
| offsetTopLeaveBottom | number (px / percent) / function | 0 | offset when element's top leave viewport's bottom |
| offsetBottomReachTop | number (px / percent) / function | 0 | offset when element's bottom enter / leave viewport's top |
| offsetBottomEnterBottom | number (px / percent) / function | 0 | offset when element's bottom enter viewport's bottom |
| offsetBottomLeaveBottom | number (px / percent) / function | 0 | offset when element's bottom leave viewport's bottom |
| onTopEnterBottom | function | 0 | trigger when element's top enter viewport's bottom |
| onTopLeaveBottom | function | null | trigger when element's top leave viewport's bottom |
| onBottomEnterTop | function | null | trigger when element's bottom enter viewport's top |
| onBottomLeaveTop | function | null | trigger when element's bottom leave viewport's top |
| onBottomEnterBottom | function | null | trigger when element's bottom enter viewport's bottom |
| onBottomLeaveBottom | function | null | trigger when element's bottom leave viewport's bottom |