Safe(ish) Eval

eval.js

// Adopted from Alpine.js
// https://github.com/alpinejs/alpine/blob/b6e07b2775de444c5f9bdc4d94accb7b720fd6a7/src/utils.js#L59

function saferEval(expression, context, additionalHelperVariables = {}) {
    return (new Function(['$data', ...Object.keys(additionalHelperVariables)], `var result; with($data) { result = ${expression} }; return result`))(
        context, ...Object.values(additionalHelperVariables)
    )
}

export default function sandboxedEval(expression, context = {}) {
  const resetGlobals = Object.keys(globalThis).reduce((a,k)=>{a[k]=undefined;return a;},{});
  return saferEval(expression, context, resetGlobals);
}