How i can debugger react welcomepage.web.js

I want to custom jitsi meet , by I add debugger in react js file and mank but the page dont show debugger

my step is

  • git pull on my git hub
  • npm install lib-jitsi-meet --force && make

To develop & debug locally you have to run webpack-dev-server for development: Developer Guide (Web) · Jitsi Meet Handbook

Just install the project dependencies and run make dev.