vm.runInNewContext(code[, sandbox][, options])
vm.runInNewContext() compiles code, contextifies sandbox if passed or creates a new contextified sandbox if it's omitted, and then runs the code with the sandbox as the global object and returns the result.
vm.runInNewContext() takes the same options as vm.runInThisContext().
Example: compile and execute code that increments a global variable and sets a new one. These globals are contained in the sandbox.
1 2 3 4 5 6 7 8 9 10 11 12 | const util = require('util');const vm = require('vm');const sandbox = { animal: 'cat', count: 2};vm.runInNewContext('count += 1; name = "kitty"', sandbox);console.log(util.inspect(sandbox));// { animal: 'cat', count: 3, name: 'kitty' } |
Note that running untrusted code is a tricky business requiring great care. vm.runInNewContext() is quite useful, but safely running untrusted code requires a separate process.
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