An asynchronous data stream is a stream of data where values are emitted, one after another, with a delay between them. The word asynchronous means that the data emitted can appear anywhere in time, after one second or even after two minutes, for example. A way to model asynchronous streams is to place the emitted values on a time axis, like so:
There are a lot of things that can be considered asynchronous. One such thing is fetching data through AJAX. When the data arrives depends on a number of factors, such as:
- The speed of your connection
- The responsiveness of the backend API
- The size of the data, and many more ...
