Template literal commands with variable interpolation

Deno Sandbox provides a sandboxed Linux microVM. This is useful for evaluating code that is not trusted or for testing code that is not safe to run in your main runtime.

These conveniences help you script sandbox tasks quickly while keeping command construction correct and secure.

Using sandbox.sh template literals lets you run shell commands inside the sandbox more safely and ergonomically:

import { Sandbox } from "@deno/sandbox";

await using sandbox = await Sandbox.create();

// Variables are automatically escaped
const filename = "file with spaces.txt";
const content = "Hello, world!";
await sandbox.sh`echo ${content} > ${filename}`;

// Arrays are expanded to multiple arguments
const files = ["file1.txt", "file2.txt", "file3.txt"];
await sandbox.sh`rm ${files}`;

// Get JSON output
const data = await sandbox.sh`echo '{"count": 42}'`.json<{ count: number }>();
console.log(data.count); // → 42

Variables interpolated into the template literal are auto-escaped, so even awkward values like file names with spaces can be passed without worrying about quoting or injection.

Arrays expand into multiple arguments automatically, making batch operations (e.g., deleting several files) concise without manual join logic. You can also chain helpers such as .json() to parse command output directly into typed data structures, eliminating brittle string parsing and keeping results strongly typed.

For more information, see the Deno Sandbox documentation.