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Web workers provide a convenient sandbox. (Done right, and depending on how smart the browser is, they aren’t even vulnerable to some of the DoS-type problems mentioned in the comments on the top answer.)
An implementation using promises:
function safeEval(untrustedCode) {
return new Promis...
Delete does not delete a variable.
The delete operator removes a property from an object.
You can try:
code = null;
