Assuming I have the content of a js file in a string. Furthermore, assume it has an exports['default'] = function() {...} and/or other exported properties or functions. Is there any way to "require" it (compile it) from that string into an object, such that I can use it? (Also, I don't want to cache it like require() does.)
Add a comment
|
1 Answer
Here's a very simple example using vm.runInThisContext():
const vm = require('vm');
let code = `
exports['default'] = function() {
console.log('hello world');
}
`
global.exports = {}; // this is what `exports` in the code will refer to
vm.runInThisContext(code);
global.exports.default(); // "hello world"
Or, if you don't want to use globals, you can achieve something similar using eval:
let sandbox = {};
let wrappedCode = `void function(exports) { ${ code } }(sandbox)`;
eval(wrappedCode);
sandbox.default(); // "hello world"
Both methods assume that the code you're feeding to it is "safe", because they will both allow running arbitrary code.
