# JavaScript Code Runner
JavaScript Code Runner allows the execution of JavaScript code.
This package base on an awesome [JS-Interpreter](https://github.com/NeilFraser/JS-Interpreter) written by Google's Neil Fraser.
Execution is completely isolated from the global JavaScript environment.
None of the DOM APIs are exposed. That is the point of a sandbox.
## Installation
```
npm i javascript-code-runner
```
## Usage
```javascript
import JSrunner from "javascript-code-runner";
const fibonacciCode = `
const result = [];
const fibonacci = (n, result) => {
var a = 1, b = 1, sum;
for (var i = 0; i < n; i++) {
result.push(a);
sum = a + b;
a = b;
b = sum;
}
}
fibonacci(12, result);
result.join(', ');`;
const { result, message } = JSrunner(fibonacciCode);
console.log(result); // 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144
console.log(message); // null (error message)
```
#### Example with a web worker
_worker.js_
```javascript
import JSrunner from "javascript-code-runner";
addEventListener("message", (e) => {
postMessage(JSrunner(e.data));
});
```