equire' is not defined

[xifengiOS]

ReferenceError: 'require' is not defined
at (loader.js:1)

[jpstotz]

I was also getting this error when performing the build commands on Windows 10.

Switching to Linux/WSL made this problem disappear:
On Linux:
First install nvm.

git clone https://github.com/frida/frida-swift-bridge.git
cd frida-swift-bridge
nvm install 20
nvm use 20
npm install
npm run watch

That creates in my environment an _agent.js that does not cause the error ReferenceError: 'require' is not defined.

[jpstotz]

I finally managed to build frida-swift-bridge on Windows. The problem may be caused by older versions of tsc and frida-compile that have been installed globally. So you just have to make sure to use the versions of tsc and frida-compile that are installed locally into node_modules\.bin directory by the npm install command:

Just compile (no watch and automatic recompile in case of source files changes) execute:

git clone https://github.com/frida/frida-swift-bridge.git
cd frida-swift-bridge
npm install
.\node_modules\.bin\tsc.cmd
.\node_modules\.bin\frida-compile -o _agent.js loader.js

You can see that it had worked by the size of the generated _agent.js. The defect version which causes ReferenceError: 'require' is not defined has ~1 KB. The correct version has 145 KB.