multiple carousals not rendering as expected

sunnykeerthi

Hi,

I’m creating 2 carousals one on top_center and another in bottom_bar. Both of them are working perfectly when I run them separately(by commenting out either top or bottom part in config.js). when I run them together they seem to show up in random times, though the interval set is the same. Here is my code.

my first slide page

Module.register("deImages", {
	// Default module config.
	defaults: {
		width: 200,
		height: 200,
		text: "Hello World!",
		slideIndex: -1,
		rotateInterval: 30 * 1000,
		animationSpeed: 3000, // fade in and out speed
		initialLoadDelay: 4250,
		retryDelay: 2500,
		updateInterval: 60 * 60 * 1000,
	},
	total_info: "Hello World!",


	getStyles: function () {
		return [
			'deImagesStyle.css'
		]
	},


	getDom: function () {
		var wrapperEl = document.createElement("div");
		var container = document.createElement("div");
		container.className = "slideshow-container";

		var div1 = document.createElement("div");
		div1.className = "mySlides fade";

		var img1 = document.createElement("img");
		img1.src = "https://www.w3schools.com/howto/img_nature_wide.jpg";
		div1.appendChild(img1);
		container.appendChild(div1);

		var div2 = document.createElement("div");
		div2.className = "mySlides fade";

		var img2 = document.createElement("img");
		img2.src = "https://www.w3schools.com/howto/img_mountains_wide.jpg";
		div2.appendChild(img2);
		container.appendChild(div2);

		var div3 = document.createElement("div");
		div3.className = "mySlides fade";

		var img3 = document.createElement("img");
		img3.src = "https://www.w3schools.com/howto/img_snow_wide.jpg";
		div3.appendChild(img3);
		container.appendChild(div3);
		wrapperEl.appendChild(container);

		Log.log("slide payload >> ");

		return wrapperEl;
	},



	showSlides1: function () {
		if (!this.slideIndex) {
			this.slideIndex = 0;
		}
		var i;
		var slides = document.getElementsByClassName("mySlides");
		for (i = 0; i < slides.length; i++) {
			console.log(slides[i]);
			slides[i].style.display = "none";
		}

		this.slideIndex++;
		slides[this.slideIndex - 1].style.display = "block";
		if (this.slideIndex > (slides.length - 1)) { this.slideIndex = 0 }

		setInterval(this.showSlides1, 2000);
	},

	start: function () {
		this.sendSocketNotification('duDash_initConnection');
	},

	socketNotificationReceived: function (notification, payload) {
		if (notification === "duDash_updateNumbers") {
			Log.log("payload >> " + payload);
			this.total_info = payload;
			this.updateDom();
			setInterval(this.showSlides1, 2000);
		}
	}
});

and here is my 2nd file

Module.register("deImages_2", {
	// Default module config.
	defaults: {
		width: 200,
		height: 200,
		text: "Hello World!",
		slideIndex: -1,
		rotateInterval: 30 * 1000,
		animationSpeed: 3000, // fade in and out speed
		initialLoadDelay: 4250,
		retryDelay: 2500,
		updateInterval: 60 * 60 * 1000,
	},
	total_info: "Hello World!",


	getStyles: function () {
		return [
			'deImagesStyle2.css'
		]
	},



	getDom: function () {
		var wrapperEl = document.createElement("div");
		var container = document.createElement("div");
		container.className = "slideshow-container";

		var div1 = document.createElement("div");
		div1.className = "mySlides fade";

		var img1 = document.createElement("img");
		img1.src = "https://www.w3schools.com/howto/img_nature_wide.jpg";
		div1.appendChild(img1);
		container.appendChild(div1);

		var div2 = document.createElement("div");
		div2.className = "mySlides fade";

		var img2 = document.createElement("img");
		img2.src = "https://www.w3schools.com/howto/img_mountains_wide.jpg";
		div2.appendChild(img2);
		container.appendChild(div2);

		var div3 = document.createElement("div");
		div3.className = "mySlides fade";

		var img3 = document.createElement("img");
		img3.src = "https://www.w3schools.com/howto/img_snow_wide.jpg";
		div3.appendChild(img3);
		container.appendChild(div3);
		wrapperEl.appendChild(container);
		Log.log("slide payload >> ");

		return wrapperEl;
	},



	showSlides2: function () {
		if (!this.slideIndex) {
			this.slideIndex = 0;
		}
		var i;
		var slides = document.getElementsByClassName("mySlides");
		for (i = 0; i < slides.length; i++) {
			console.log(slides[i]);
			slides[i].style.display = "none";
		}

		this.slideIndex++;
		slides[this.slideIndex - 1].style.display = "block";
		if (this.slideIndex > (slides.length - 1)) { this.slideIndex = 0 }

		setInterval(this.showSlides2, 2000);
	},

	start: function () {
		this.sendSocketNotification('duDash_initConnection2');
	},





	socketNotificationReceived: function (notification, payload) {
		if (notification === "duDash_updateNumbers2") {
			Log.log("payload >> " + payload);
			this.total_info = payload;
			this.updateDom();
			setInterval(this.showSlides2, 2000);
		}
	}
});

when I run this, Here is a small gif that I’ve recorded to show the output.

https://giphy.com/gifs/XbD0g7cAz8zVdwtQLj/fullscreen

please let me know where am I going wrong and how Can I run the two files parallel instead of simultaneously.

Thanks,
Sunny

sdetweil

At the end if your showslides functions add

this.updateDom(1000)

To tell mm to get the new content via the getDom() function

sunnykeerthi

Hi @sdetweil ,

thanks very much for the quick reply. I added this.updateDom(1000), but I get the error as below.

Uncaught TypeError: this.updateDom is not a function

I did the below to both my files.

this.slideIndex++;
slides[this.slideIndex - 1].style.display = "block";
if (this.slideIndex > (slides.length - 1)) { 
  this.slideIndex = 0 
}
setInterval(this.showSlides1, 2000);
this.updateDom(1000);

please let me know where am I going wrong.

Thanks

sdetweil

@sunnykeerthi weird

U used it above

this.updateDom()

sdetweil

actually this is because you have fired a timer on the slide update

showSlides2: function () {
		if (!this.slideIndex) {
			this.slideIndex = 0;
		}
		var i;
		var slides = document.getElementsByClassName("mySlides");
		for (i = 0; i < slides.length; i++) {
			console.log(slides[i]);
			slides[i].style.display = "none";
		}
 
		this.slideIndex++;
		slides[this.slideIndex - 1].style.display = "block";
		if (this.slideIndex > (slides.length - 1)) { this.slideIndex = 0 }

		setInterval(this.showSlides2, 2000);   //< ------- here restarts the function, BUT inside the function  'this'; becomes the context of the timer routine and not the module.. 
                this.updateDom(1000);  // or whatever transition time u want.
	},

to fix it you need an arrow function to keep context right

see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions

but net

showSlides2: function () {
		if (!this.slideIndex) {
			this.slideIndex = 0;
		}
		var i;
		var slides = document.getElementsByClassName("mySlides");
		for (i = 0; i < slides.length; i++) {
			console.log(slides[i]);
			slides[i].style.display = "none";
		}

		this.slideIndex++;
		slides[this.slideIndex - 1].style.display = "block";
		if (this.slideIndex > (slides.length - 1)) { this.slideIndex = 0 }

		setInterval( () => { this.showSlides2()} , 2000);   // < --- was a typo here..  need () => { stuff } 
                this.updateDom(1000);  // or whatever transition time u want.
	},

UNSOLVED multiple carousals not rendering as expected