@StuGrunt said in Head first developing MM module for extreme beginners:
It is because there is an error (at least I think so - I am new too) and no instructions on where to put the function.
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change the Module.register(“MMM-Timetable”) to Module.register(“MMM-Test”)
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The article does not tell you where to put the getDom function when it is first introduced. Replace the getDom: function() {}. with the code shown. In other words, don’t just add it to the file. This article would have benefited from a final section that gave the entire code.
I think the original author at least expected us to be very familiar with Node.js (fair enough), but alas, I am not so it took a bit of work to figure it out. :-)
Here it is, for the first part:
Module.register(“MMM-Test”, {
defaults: {},
start: function () {},
getDom: function() {
var element = document.createElement(“div”)
element.className = “myContent”
element.innerHTML = “Hello, World!”
return element
},
notificationReceived: function() {},
socketNotificationReceived: function() {},
})
_
Both of those functions go outside the getDom function pretty much anywhere you want to put them.
The socketNotificationReceived function [example below, can be used in either node_helper OR your main.js file. The example below is in my node_helper] :
socketNotificationReceived: function(notification, payload) {
if (notification === 'CONFIG') {
this.config = payload;
}
if (notification === 'GET_CURRENT') {
this.getCurrent(payload);
}
if (notification === 'GET_FORECAST') {
if (this.forecast.timestamp === this.getDate() && this.forecast.data !== null) {
this.sendSocketNotification('FORECAST_RESULT', this.forecast.data);
console.log("Using data we already have");
} else {
this.getForecast();
console.log("Getting new data");
}
}
}
Here is the corresponding one in the main.js
socketNotificationReceived: function(notification, payload) {
if (notification === "CURRENT_RESULT") {
this.processCurrent(payload);
}
if (notification === "FORECAST_RESULT") {
this.processForecasts(payload);
}
this.updateDom(this.config.initialLoadDelay);
},
You can use notificationReceived to receive info from other modules like this:
Here are examples of that:
notificationReceived: function (notification, payload){
if (notification === 'CURRENT_RESULT') {
this.processCurrent(payload);
}
},
this.sendNotification('CURRENT_RESULT', payload);
This is how I send and receive my ‘payload’ from one module to another.
The first example is getting my ‘CURRENT_RESULT’ [getting info for a Forecast module from the Current weather module] from the bottom example that is
sending out ‘CURRENT_RESULT’…
The bottom example will ‘broadcast’ and in reality ANY module can get the data it’s sending out.
Hope this helps. It’s a really simple process.
