How to change views between 2 running tasks

{
"workspace": ["main", "test"],
    "tasks": {
        "dev": {
            "dependencies": ["dev:test", "dev:main"]
        },
        "dev:test": {
            "command": "deno task --cwd=./test dev"
        },
        "dev:main": {
            "command": "deno task --cwd=./main dev"
        }
    }
}