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edifice-facade
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We can connect different parts of an application with an EventEmitter. Let's
call this the core
.
function initUserInterface(core) {
form.onsubmit((data) => {
core.emit("contentupdate", data);
});
}
If a contentupdate
can also come from a database update, we want to listen for
these in the user interface module. This can cause an annoying event loop.
function initUserInterface(core) {
form.onsubmit((data) => {
core.emit("contentupdate", data);
}
core.on("contentupdate", (data) => {
form.update(data);
});
}
Facades create a separate "view" of the core for each module. Facades don't fire their own events, only those of other facades.
const EventEmitter = require("events").EventEmitter;
const Facade = require("edifice-facade");
const core = new EventEmitter();
const dbFacade = new Facade(core);
const uiFacade = new Facade(core);
But we don't want the database module firing an "alertuser"
event. We create
internal application security with permissions.
const dbFacade = new Facade(core, {
on : ["contentupdate", "contentexpiry", "userloginattempt"],
emit : ["contentupdate", "userloginsuccess", "userloginfailure"]
});
Now all that's left is to pass your facades to each of your modules.
require("./userInterface").init(uiFacade);
Top tips:
I originally planned on making a module called edifice as the core, then realised the core could just be a plain old EventEmitter. So ediface is no more. Long live facade.
MIT.
FAQs
Create facades to separate modules in your application
The npm package edifice-facade receives a total of 7 weekly downloads. As such, edifice-facade popularity was classified as not popular.
We found that edifice-facade demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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