fix: check for src before attempting to add popover

Jacky Zhao

2022-04-06 f9c7cdf928e8068532d2630336a7b08d5085548e

 .gitignore

@@ -3,5 +3,5 @@
resources
.idea
content/.obsidian
static/linkIndex.json
static/contentIndex.json
assets/indices/linkIndex.json
assets/indices/contentIndex.json