CODEWITHSUNDEEP
node.js
user1643318
user1643318

Reputation: 33

EventEmitter creation

What is the difference between following:

new require('events').EventEmitter();

AND

var events = require('events');
new events.EventEmitter();

The first one is not working, but second one - works.

Why?

Upvotes: 3

Views: 114

Answers (1)

raina77ow
raina77ow

Reputation: 106483

Note the difference between these lines:

new foo().bar()

... and ...

new foo.bar()

In the first case new operator will change how foo() function is processed: it will be used as a constructor (with this pointing to its prototype copy etc.)

But in the second case new operator cannot be applied to foo, as the latter is not invoked: it's its bar property that is called instead. Naturally, new here means foo.bar is used as a constructor instead.

And that's exactly what happens in your example: the first case tries to apply new to require function call, not to %require_result%.EventEmitter one.

Upvotes: 4

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