One thing I consistently do is inject
app.constant('DOCUMENT_ID', window.documentId || 1);I'm now looking to convert DOCUMENT_ID into a global variable. The goal is for any changes made to DOCUMENT_ID in a controller to be reflected in all services and controllers where DOCUMENT_ID was injected. How can I achieve this using a global variable?
Avoid using global variables in this scenario as it is considered a poor practice. Instead, take advantage of the fact that objects are passed by reference. One way to implement this is by creating a service like the following:
app.value('DOCUMENT', {
ID: window.documentId || 1
});
By modifying DOCUMENT.ID, you can ensure that every part of your application will reflect the updated version of the ID. Just treat it like an object property.
Check out the demonstration here: http://plnkr.co/edit/Oay8IaLRnuCN2xkSuM69?p=preview
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