Use in vue3:

var jweixin = require('jweixin-module');

It will be compiled with the error: require is not defined, there is no require module, change to import, because jweixin-module does not support export writing, so the introduction can not succeed.

Solution:
Use a third-party wrapper jdk: weixin-js-sdk

npm install weixin-js-sdk -S

import jweixin from 'weixin-js-sdk'