# IntersectionObserver IntersectionObserver.relativeTo(string selector, Object margins)
with Promise style call: Not supported
Mini Program plugin: Support
Use the selector to specify a node as one of the reference ranges.
# parameter
# string selector
Selector
# Object margins
Used to extend (or contract) the boundaries of the reference node layout area
| attribute | type | Default values | Required | Introductions |
|---|---|---|---|---|
| left | number | no | Left bound of node layout area | |
| right | number | no | Right bound of node layout region | |
| top | number | no | Upper Boundary of Node Layout Area | |
| bottom | number | no | Lower boundary of node layout area |