launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Launch Examples",
            "request": "launch",
            "type": "chrome",
            "url": "http://localhost:8030",
            "webRoot": "${workspaceFolder}"
        },
        {
            "type": "node",
            "request": "launch",
            "name": "Launch Unit tests",
            "program": "node_modules/jest/bin/jest.js",
            "args": [
                "--runInBand"
            ],
            "skipFiles": [
                "<node_internals>/**"
            ]
        },
        {
            "type": "node",
            "request": "launch",
            "name": "Run a single test",
            "program": "node_modules/jest/bin/jest.js",
            "args": [
                "--",
                "-i",
                "${relativeFile}",
                "-t",
                "${selectedText}"
            ],
            "skipFiles": [
                "<node_internals>/**"
            ]
        },
    ]
}