{{}} appears on the html page, but the project does not use a template engine. What's going on?

This is the output variable

Reply content:

This is the output variable

Say you are like jinja2 template engine.

Value operator:

<code>{{}}</code>

Reference link description

Probably vue.js

The default format of angularjs is {{}}. The reference website http://api.crap.cn uses {{}} symbols to parse and output json data