为什么我的 JSFiddle 能用,但我的 Codepen 不行?

Why does my JSFiddle work, but not my Codepen?

JSFiddle

Codepen

少了什么?

Please see my two previous links.

你没有向你的 Codepen 添加资源,我从 jsfiddle 添加,现在 codepen 可以,

https://unpkg.com/leaflet@1.0.3/dist/leaflet.js
https://unpkg.com/vue2-leaflet@0.0.58/dist/vue2-leaflet.js

https://unpkg.com/leaflet@1.0.3/dist/leaflet.css