this is my launch.json file (it works for me):
{
"version": "0.2.0",
"configurations": [
{
"type": "edge",
"request": "launch",
"name": "Launch Edge against localhost",
"url": "http://localhost:4200",
"webRoot": "${workspaceFolder}",
"skipFiles": [
"${workspaceFolder}/node_modules/**/*.js"
]
}
]
}