Creating a child process of a bash file in node - node.js

Question

Below I have a string with newlines line, this string is the contents of a bash file. I was wondering if there was a way to run this contents without creating the bash file. I would like to do something like below, where I just pipe the contents to the sh command. But this blew up with the error below.
let string = "\necho \'hello-world\'\n"
execAsync(`${string} | sh`)
I know I can create a temp file / exec it with the path equal to the current working dir / delete the file. But I'd rather not go through the trouble if there's a way to run the script without creating a file.
Error:
{ Error: Command failed:
echo 'hello-world'
| sh
/bin/sh: -c: line 2: syntax error near unexpected token `|'
/bin/sh: -c: line 2: ` | sh'
at ChildProcess.exithandler (child_process.js:207:12)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at maybeClose (internal/child_process.js:852:16)
at Socket.<anonymous> (internal/child_process.js:323:11)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at Pipe._handle.close [as _onclose] (net.js:492:12)
cause:
{ Error: Command failed:
echo 'hello-world'
| sh
/bin/sh: -c: line 2: syntax error near unexpected token `|'
/bin/sh: -c: line 2: ` | sh'
at ChildProcess.exithandler (child_process.js:207:12)
at emitTwo (events.js:106:13)
at ChildProcess.emit (events.js:191:7)
at maybeClose (internal/child_process.js:852:16)
at Socket.<anonymous> (internal/child_process.js:323:11)
at emitOne (events.js:96:13)
at Socket.emit (events.js:188:7)
at Pipe._handle.close [as _onclose] (net.js:492:12)
killed: false,
code: 2,
signal: null,
cmd: '\necho \'hello-world\'\n | sh' },
isOperational: true,
killed: false,
code: 2,
signal: null,
cmd: '\necho \'hello-world\'\n | sh' }

Answer 1

Pass the script contents to the shell through the -c option. It is supported by most shells.
Example:
var execAsync = require('exec-async');
let script = "echo \'hello\' $(whoami)\nls -l\necho 'bye'"
execAsync('sh', ['-c', script]).then(console.log).catch(console.log);