> For the complete documentation index, see [llms.txt](https://lifeoverflow.gitbook.io/learning-javascript/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lifeoverflow.gitbook.io/learning-javascript/shi-ji-ying-yong.md).

# 實際應用

一開始是使用 `Fetch` 此library向server發http request得到資料，通常返回資料為JSON.