Is There a Name Clash Issue with Dependency Injection in AngularJS?

Let's say I have two modules, finance2 and finance3, both of which define a service called currencyConverter.

If I specify that my main module only depends on finance2, I can inject the service like this:

angular.module('invoice2', ['finance2'])
  .controller('InvoiceController', ['currencyConverter', function(currencyConverter) {

But what happens if I want invoice2 to depend on both finance2 and finance3? Which currencyConverter will be injected then? Will it be the one from finance2 or the one from finance3? While I can control my own modules, I'm concerned about how Angular handles situations where external modules define factories with the same name. How does Angular manage this issue?

angular.module('invoice2', ['finance2','finance3'])
  .controller('InvoiceController', ['currencyConverter', function(currencyConverter) {
javascriptangularjs

Answer №1

Remember: The script that loads/processing last wins.

If you have these scripts:

  • finance2 (including currencyConverter)
  • finance3 (including currencyConverter)

Then, when the dependency for currencyConverter is resolved, you will get finance3's currencyConverter.

If you have these scripts:

  • finance3 (including currencyConverter)
  • finance2 (including currencyConverter)

Then, upon resolving the dependency for currencyConverter, you will receive finance2's currencyConverter.

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