Is it possible for the original object to be altered when passing it as a parameter to a function in a different file?

When you update an object passed as a parameter, will the updates be reflected "upwards" if the method receiving the parameter is in a different file? Or will the object retain its own context despite being passed down?

Answer №1

Indeed, that has been revised as well. When working with JavaScript, you're essentially passing references to objects rather than the actual objects themselves.

let exampleObj = {
  key: 'value'
};

function updateValue(input) {
  input.key = 'hello';
}
updateValue(exampleObj);
console.log(exampleObj.key); // displays 'hello'

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