> For the complete documentation index, see [llms.txt](https://k3nsei.gitbook.io/ng-in-viewport/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://k3nsei.gitbook.io/ng-in-viewport/master.md).

# Introduction

 **ng-in-viewport** gives you a directive that uses Intersection Observer API. To provides a simple way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport.