Goodbye Force.com IDE Beta…Hello Visual Studio Code

Back in 2016, I wrote a post here about how the Force.com IDE was making an epic comeback, with support for Lightning.  At the time I was very excited to see that Salesforce was refocusing it’s efforts towards improving that tool in the form of a Beta. Even though the Force.com IDE was the original tool that Salesforce offered and it had a long history with the development community, it had failed to keep up with the bevy of tools now being offered by third-parties.

Fast forward to today and the recent announcement by Salesforce that the Force.com IDE Beta has been officially discontinued.

So where does that leave Salesforce developers?

Well, not as bad as you might think. Salesforce is not giving up on supporting a local IDE. Nor are they giving up on the original version of the Force.com IDE (at least not just yet). So far, only the new Beta will be discontinued.

It is just that they are focusing their efforts towards improvement of the Salesforce Extensions for Visual Studio (VS) Code. It just made no sense to support two tools and after analyzing feedback from the Beta of the Force.com IDE, the team had to make a clear choice and Salesforce Extensions for VS Code came up the winner.

I personally prefer Visual Studio Code and there is no question that it is easier to install than Eclipse (which was always a bit of a nightmare imho with all the required Java installs it required). I also like how intuitive it is and that I can use it to do all sorts of other modern development. If there is a popular modern language out there, you can safely bet that VS Code supports it.

If you have not had a chance to check it out yet, I highly suggest you do so and just remember to keep an open mind.

Also, be aware that Salesforce Extensions for VS Code does not yet support everything that the Force.com IDE does. Like I said earlier, the original Force.com IDE is not going away, just the newer Beta version which included support for Salesforce DX and Lightning. It is going to take some time for the development team to get all the features that the Force.com IDE offers into Salesforce Extensions for VS Code.

But keep in mind, that VS Code is where they are headed, so if you have not yet checked out Visual Studio Code, now is the perfect time to do so. I think you will be pleasantly surprised and impressed with it.

And let me know what you think…

Why you should be using the Lightning Data Service whenever possible

If you are creating Lightning components and working with a single record of data, you should be using the Lightning Data Service (LDS) or the force:recordData tag.

And for those of you that have not heard about the LDS, you can think of it as the standard controller for lightning components. It is similar to the standard controller used in Visualforce in that it gets you access to your orgs data, but without the need to write any Apex or SOQL and that is a pretty cool thing because when you don’t have to worry about writing Apex, you also do not have to worry about FLS or Field Level Security and CRUD or Create Access Update and Delete security, which is something you would have to specifically check for in your code if you did not use the Lightning Data Service.

You see I have to tell you that all of you Visualforce developers have been a bit spoiled when it comes to security, b/c in most cases, the pages that you wrote did not have to specifically check for these permissions (even when they used controllers). But, the Lightning Platform works very differently than Visualforce and any Apex code you write does have to do these checks, which involves writing more code.

With the Lightning Data Service, you also get other built-in features like auto-notifications when there are record changes, as well as offline access for Salesforce1.

And if all that was not enough to convince you that Lightning Data Service is something you want to use, here is one more really big reason. Even if you have multiple components using the Lightning Data Service, they are all going to use a single request and deal with a cached response and in terms of performance this is huge.

Even if you have multiple components using the Lightning Data Service, they are all going to use a single request and deal with a cached response

So let’s talk about that a bit more. Let’s say you have two components that are using the force:recordData tag. Each one will make a request for data through the Lightning Data Service Controller, and those requests will be funneled into one single request which is sent to the Salesforce server, such as you see here.

LDSDemo2

But what is returned is a response that will be stored in a shared data cache and also returned back to the two components that started all this, such as in the diagram below. And this means that not only will those two components be able to retrieve the data faster than two components that were using their own apex controllers

LDSDemo3

But if a third component that needed that same data were to come along, it would be able to get a cached response almost immediately without even having to make a call to the server. Boom!

LDSDemo4

And the beauty of it all is that you can implement this with just a few lines of markup code in the component and then a few more lines in the JavaScript controller to load and save the record. You do not have to write any Apex or SOQL code to implement this, but you get all the performance benefits.

So now do you see why you need to be using the Lightning Data Service whenever possible?

If you found this article useful, you might want to checkout my latest course on Pluralsight titled, Lightning Component Development Best Practices, where I talk about the Lightning Data Service and a lot more.

 

Check Out Lightning Component Development Best Practices on Pluralsight

DevBestPractices

I am so happy to announce that my third course about Lightning Component Development Best Practices was published on Pluralsight last night.

I worked extra hard on this course and have spent every weekend for the past 6 months toiling over every little thing I included. I am really hoping that effort shows through and I would love to hear your feedback (good or bad). All feedback is welcome. The good stuff makes me feel good and the bad stuff makes me better, so it’s all good.

Here is the description for the course and a listing of the specific things it covers:

Are your Lightning Components performing at the best level they can? Are they secure? Will they scale well as you start to build more complex Lightning Applications? In this course, Lightning Component Development Best Practices, you’ll learn the answers to these questions and more. First, you’ll find out what simple best practices you can incorporate to improve client-side rendering. Next, you’ll learn how to enhance server-side efficiency. Finally, you’ll discover what you can do to ensure your components are secure. When you are finished with this course, you’ll have the confidence to build Lightning Components that run “Lightning Fast”.

Modules:

  • Improving Client-Side Performance
  • Enhancing Efficiency on the Server
  • Reusing Code in Complex Applications
  • Avoiding the Pitfalls of Inter-Component Communication
  • Enforcing Security and Mistakes to Next Make

 

 

 

 

5 Ways to Build Lightning Fast Components

This post is based on a talk I gave twice at this years Dreamforce.

The five tips I cover here were hand picked by me out of a whole bunch of stuff I discovered while creating my latest Pluralsight course about Lightning Best Practices. The course will be released soon, so stay tuned and I will let you know. All of these tips are pretty simple to implement and I think they represent the quickest and easiest things you can do to get better performance.

So, in David Letterman style. here they are from last to first:

# 5 – Check your Settings

Specifically, you want to check the values for debug mode and component caching, which should have different values depending on whether you are in production versus development.

Debug Mode

Debug mode is what you can toggle to allow detailed debug messages to appear in your browsers console log and these messages can really help you not only to debug your components, but as you will learn about soon, they feature important messages about performance.

For the debug mode, you want that to be enabled in development, so you can get those messages you need as you are developing, but in production, you want to make sure this is turned off b/c when it is enabled, it means that all the css and javascript that is downloaded to the client is not minified, which means it will take longer to download and longer for your components to render and that is why you do not want it enabled in production.

DebugMode

Component Caching

Component caching has to do with whether pages will be cached to specifically improve performance, which is why that one is so important.

For the component caching, the settings should be the opposite and you want caching disabled in development, because while you are making changes to components and testing how they render, you do not want to have to hit your browser refresh several times before you see your changes which is what will happen if it is enabled. But, in production, where changes to the code are not happening, you want to make sure caching is enabled, since this will result in faster component rendering.

ComponentCaching

# 4 – Use <aura:if> for Conditional Rendering

To do conditional rendering in Lightning, you could use a technique known as css toggling and for a long time this was actually the way even Salesforce recommended you do toggling in the official docs. But in fact, what we now know is that you do not want to do this and the reason why is that when you use this method, any components inside the css toggled code (and most importantly any event handlers associated with those components) are rendered right away.

The alternative is to use the aura:if tag. Using this means that anything inside the aura:if will not actually be rendered until the condition is true. So in the example below, the event handlers associated with the lightning button will not be active until the aura:if condition is true.

<aura:if isTrue="{!v.isVisible}">
             <lightning:button label="Submit"
            onclick="{!c.newRecord}" />
 </aura:if>

# 3 – Check your Console Log

The number 3 tip is a reminder to always check your browsers console log because not only can you use this for debugging your components, but the lightning development team now will push performance warning messages to the console log and so even if your component is rendering fine and doing everything you want it to, you could have a performance issue and not even be aware of it.

PerformanceWarnings.png

You can access the Console log for the Google Chrome browser by right-clicking inside the browser and selecting Inspect. But know that these messages will only appear when debug mode has been enabled, so this is something you want to only check for in your development org.

# 2 – Use the Lightning Data Service whenever possible

The Lightning Data Service is just way cool and offers a whole bunch of great features. If you do not know about it, check out this great Trailhead that tells you all about how to use it.

The best thing about the Lightning Data Service (or <force:recordData> tag) is that it provides a single cached response and this can have a big impact on performance.

Let’s say you have three components that are all using the force:recordData tag. Each one will make a request for data through the Lightning Data Service Controller, and those requests will be funneled into one single request which is sent to the Salesforce server.

But what is returned is a response that will be stored in a shared data cache and also returned back to the two components that started all this. And this means that not only will those two components be able to retrieve the data faster than two components that were using their own apex controllers.

And if a third component that needed that same data were to come along, it would be able to get a cached response almost immediately without even having to make a call to the server. Boom!

LDS2

# 1 – Use Storable Actions whenever possible

So here we are at the number one tip and it is to use storable actions whenever possible, which essentially allows you to take advantage of caching and get all the benefits that you just saw demonstrated, even when you are not using the Lightning Data Service.

And a good example of this can be seen with a component that needs to access a list of data (which is something that the Lightning Data Service currently cannot handle, since it only works with a single record).

When paging through a list of records that use storable actions, after the pages are rendered once, the next time they are returned to, the rendering will happen in a fraction of the original rendering time. This can results in significant performance savings when a user needs to page through a long list of records.

And to take advantage of caching, all you have to do is add a single line of code right after you define the action, such as in the following example:

​var action = component.get('c.getRacesDB');
​action.setStorable();
​action.setCallback(this, function(response) {
​            // Code here to handle the response
​}
​$A.enqueueAction(action);

If you found this article useful, you might want to checkout my latest course on Pluralsight titled, Lightning Component Development Best Practices, where I talk about base lightning components and a lot more.

Workaround for problem with lightning:input and datetime-local

EDIT: See important new update below in the Workaround

As I was preparing the code for my upcoming Pluralsight course about Lightning Best Practices, I ran into an error with the new lightning:input base lightning component that up until today had me banging my head on the desk. Since I would hate to see any of you go through all the agony I have faced with this issue, I am writing this up and hope it saves someone unnecessary grief.

The Problem

bug

The lightning:input component creates an HTML input component and supports the datetime-local input type. This particular base lightning component is still in beta, so I am not terribly surprised that it has a few issues and I suspect that this problem will be resolved eventually.

In the meantime, if you attempt to use the input component and the datetime-local type, such as in the following code:

<lightning:input label="Date/Time"
                         type="datetime-local"
                         name="DateTime"
                         aura:id="DateTime" 
                         value="{!v.newRace.DateTime__c}" />

And you attempt to save the record to the database, you will get back an error message similar to the following:

Error

The following error has occurred: [{"fieldErrors":{"DateTime__c":[{"message":"Invalid data type.","fieldApiName":"DateTime__c","fieldLabel":"Date Time"}]},"pageErrors":[{"message":"The Record provided contains field(s) with invalid data."}]}]

Countless searches did not help find a solution and after playing around with it for a while, I determined that the problem was coming from the fact that the seconds (which should be optional) were not included in the string that was being sent to the server.

For example, if I were to print to the console log the value of the input date time after it had been entered, but before it was saved, it would look like this:

2017-09-01T09:00

Notice the missing seconds?

The Workaround

Of course, you can always go back to using the ui:inputDateTime component, which does not seem to have this same problem.

EDIT: Turns out using the ui:inputDateTime is the only suitable workaround for this problem at this time. I was contacted by a member of the Salesforce team, who told me that using the workaround I describe below has one major drawback. It converts all dates to using GMT time and not the users local time and therefore is NOT a good workaround. They suggest just using the ui:inputDateTime until the fix is released as part of the Spring 18 release.

As looking for another option, I discovered that if I use the AuraLocalizationService to format the date time string and include the missing seconds, then the save to the database would work.

So, the code I needed to do that, resides in my client-side controller and looks like the following:

var rawDate = component.get("v.newRace.DateTime__c");
var formattedDate = $A.localizationService.formatDate(rawDate, "yyyy-MM-ddTHH:mm:ss");
component.set("v.newRace.DateTime__c", formattedDate);

Now if I print to the console log the value of the formattedDate variable, I see this and the record save successfully.

2017-09-01T09:00:00

I suspect this is a bug (EDIT: YES, it is and it will be fixed in the Spring 18 release) and imagine it will soon be fixed, but hope this helps someone struggling with using the component in the meantime.

 

 

Lightning Best Practice: Handling FLS Exceptions Gracefully

If you found this article useful, you might want to checkout my latest course on Pluralsight titled, Lightning Component Development Best Practices, where I talk about base lightning components and a lot more.

If you are a Visualforce developer, then you may be surprised to learn that FLS (Field Level Security) and CRUD (Create Access Delete and Update) permissions are NOT handled automatically in your Aura-enabled code.

And in case you do not know, Aura-enabled code is the code used for Lightning components and most of this code is used to access the data in your Salesforce org. The gotcha here is that unless you are specifically checking permissions in this code, then it is possible your Lightning components could be unintentionally exposing sensitive data from your Salesforce org. 

Ouch!!!

The Problem

While there are code examples out there (such as this one on in the Lightning Developer Guide), I think there is a fundamental flaw in most of these examples. And that flaw is that they do not handle exceptions gracefully.

To demonstrate, let’s see take a look at some code that is very similar to the code used in the official Lightning docs. This code is used in the Controller of a Lightning component which lists data from a custom object called Race.

String [] raceFields = new String [] {'Id','Name','DateTime__c',
'Location__c','Attended__c','Type__c','Results__c' };

Map raceMap =
        Schema.SObjectType.Race__c.fields.getMap();

for (String field : raceFields) {
   if (!raceMap.get(field).getDescribe().isAccessible()) {
      throw new System.NoAccessException();
         return null;
   }
}

res.races = [SELECT Id, Name, DateTime__c, Location__c,
               Attended__c, Type__c, Results__c FROM Race__c
            ORDER BY DateTime__c desc
            LIMIT :pSize OFFSET :offset]; 
return res;

This code will first check to see if all the fields that need to be queried are accessible and if any one of the fields is not accessible, it will throw a NoAccessException.

Seems ok, right?

Well to begin, let’s take a look at what you would see in the browser if this code is run and the user does NOT have access to one of the fields:

NoAccessException.png

YUK!!!!

Not only is this message ugly, it is extremely unhelpful.  Surely, there must be something better?

Option 1 – a Better Error Message

Well, the first option you have is to simply replace the code that throws a System.NoAccessException, with code that throws an AuraHandledException, such as this:


 for (String field : raceFields) {
    if (!raceMap.get(field).getDescribe().isAccessible()) {
        throw new AuraHandledException(
            'Were sorry, but you do not have access to this field: ' 
            + raceMap.get(field).getDescribe().getName());
        return null;
    }
 } 

The message you will see now when one of the fields is not accessible is this:

BetterException

Much better, don’t you think?

Option 2 – Handling the Exception Gracefully

But wait, it can get EVEN better…

Instead of returning null when a field is not accessible, we can instead make a few more changes to the code, such as this:


String [] raceFields = new String [] {'Id','Name','DateTime__c',
            'Location__c','Attended__c','Type__c','Results__c' };
  
Map raceMap = 
      Schema.SObjectType.Race__c.fields.getMap();

List fields = new List();
String query = '';
for (String field : raceFields) {
    if (raceMap.get(field).getDescribe().isAccessible()) {
        fields.add(field.trim());
    }
}
if(fields.Size() > 0) {
    query = 'SELECT ' + String.join(fields, ',') + ' FROM Race__c';
    query+= ' ORDER BY DateTime__c desc LIMIT ' + pSize;
    query+= ' OFFSET ' + offset;
}
res.races = Database.query(query);
      
return res;

In this version, I am still looping through all the fields to see if they are accessible, but rather than throwing an exception when even one field is not accessible, I am instead adding the accessible field to a list I created called fields. I am then building a dynamic query string using only the fields that are accessible and finally just executing the query using the database.query method instead.

The result is that when the component renders, rather than seeing any error message at all, the user sees the list of races. But, any fields that are not accessible are just left blank.

Now, I happen to think this is the best solution. What do you think?

If you found this article useful, you might want to checkout my latest course on Pluralsight titled, Lightning Component Development Best Practices, where I talk about handling FLS exceptions and a lot more.

Lightning Best Practice: Storable Actions

File_Server_Cache_Blue

Storable Actions are a GREAT way to enhance the performance of your Lightning components and implementing them is incredibly easy, but there is one big gotcha to seeing them work with a stand-alone Lightning Application.

Even though storable actions are automatically configured in Lightning Experience and Salesforce1, any Stand-alone Lightning apps that are used to host your components will NOT use caching by default.

For these apps to use storable actions, you must do these two things:

1.) Add a new component which you can name whatever you want, but I named mine AppTemplateComponent and have it use the following code:

AppTemplateMarkup

2.) You then need to add the following attribute to the aura:application tag of your Lightning Standalone app:

template="c:AppTemplateComponent"

Once you do this, you should be able to see the caching working for any component used in that app that calls the following line of code:

action.setStorable();

Isn’t that amazing?

Just one line of code is all you need to add to start taking advantage of caching in your server-side actions. The impact on performance can be amazing and perhaps the best place to see is when it comes to rendering a list of data (especially if that data is non-mutable and therefore will not be updated).

This best practice really is a no brainer that everyone building Lightning Components should consider using.

If you found this article useful, you might want to checkout my latest course on Pluralsight titled, Lightning Component Development Best Practices, where I talk about storable actions and a lot more.

Salesforce Play By Plays on Pluralsight

Screen Shot 2017-07-15 at 11.24.33 AMMy good friend Don Robins has been hard at work putting together a new series of Play by Play Pluralsight courses that are all about Salesforce development. This is all part of a deliberate attempt by Pluralsight to greatly expand the Salesforce portion of their library. Which, in case you have not noticed, has grown quite a lot in just the past year – with lot’s more good stuff to come.

If you are not familiar with them, courses in the Play by Play series are not your typical Pluralsight courses. They are more of a dialogue or open-end discussion in which the host, Don Robins interviews Salesforce MVP’s about topics they are the most knowledgeable and passionate about. Don does a great job of channeling all the best talk show hosts, as he playfully challenges each MVP, asking all the questions the viewer themself might ask. It is not so much of a “watch me do this” as it is a “so this is why I am thinking of doing this particular thing and here are a few ways I might do it”.

There are currently 4 Play by Play videos available and they cover the following topics:

Moving Visualforce Code to the Lightning UI in Salesforce

Featuring non-profit guru and certified developer and administrator Bonny Hinners, this Play by Play walks you through things to consider when moving your legacy Visualforce code to the new Lightning Experience. This is a topic I also cover in my course and is one that I think many Salesforce developers will be pondering over for years to come.

Managing Data in Salesforce Using Apex

In this Play by Play, Don sits down with Dan Appleman, Salesforce MVP and author of Advanced Apex Programming, to discuss all the gotchas you need to consider when working with data in your org. He will alert you to the common pitfalls that most developers make and lead you towards a better way of approaching your trigger code and unit tests.

Knowing When to Code in Salesforce

This is perhaps one of the most important topics for Salesforce Developers and one that is covered in depth by Don and Salesforce MVP and new Pluralsight superstar, David Liu. David introduces a common scenario and then talks through all the different ways the solution could be achieved. Beginning with custom fields and then moving on to Workflow Rules, Process Builder, Flows, and finally when there are no other options, Apex code.

How to Mobilize Your Salesforce App

Featuring mobile expert and Salesforce MVP, Gaurav Kheterpal, you will learn about all the different ways you can approach mobilizing your Salesforce apps. Starting with the easiest but least flexible alternative, Salesforce1 and then moving on to the more complex, but robust alternatives of going hybrid with the Android or iPhone mobile SDK’s, you will learn the pros and cons of each. Finally, you will learn how to build Hybrid apps, where you get some of the best of native, without all the complexity native brings.

And if you do not already have a Pluralsight subscription, now is the best time to get one (but make sure you hurry): Get up to a $30 Visa gift card when you sign up for Pluralsight by June 30!

Gotcha to watch out for when using new Base Lightning Components

bugThis weekend I discovered a very annoying issue (which I kind of consider to be a bug) when working with the new Base Lightning Components. Don’t get me wrong, I love these new components and think they are awesome. But, this particular issue had me banging my head for a few hours and I really wish I had those hours back. So, to save you from the same pain I experienced, I am writing about the issue here.

I would not be surprised if other developers encounter this same issue when they go to convert Lightning Components from using the older ui components to the new lightning ones. This was what I was doing and when I went to preview the component and all I got was a loading image and a message in the console that told me I had encountered an Internal Server Error. This error is essentially meaningless and just indicates that some error has occurred that was not properly handled by the system. Ughhhh, no help at all.

Everything in my code appeared right and it took me a while to finally notice that one of the components I had converted (the ui:inputText component to the new lightning:input) was missing the name attribute. Turns out that the name attribute is required for the new component. It was not required or even used for the ui:inputText component, which is why I failed to notice it in the first place.

Rather than give me a message when I try to save the markup or even trap the error and give me a legitimate message in the console log, I got the rather useless and general Internal Server Error. I imagine this will be resolved at some point, but in the meantime, I am writing this up to hopefully save someone else the misery I felt trying to figure out what was going on.

And if you are new to Lightning development and not sure what the new Base Lightning Components are all about and why you would want to use them, check out this post. Or, you can check out my latest course, which has a module that covers using them.

Lightning is to Visualforce what .NET was to Visual Basic

When I began my programming career, Visual Basic (version 3.0) was just emerging as a popular alternative for creating Windows-based applications. Ironically, it was a component-based approach to development that brought forth an army of programmers developing third-party components. Programmers could quickly spin up applications by simply dragging and dropping components onto a form design surface and then wiring everything together with events.

Visual Basic grew in popularity and for a few wonderful years, it was the hot new kid on the block. It brought about a sort of programming renaissance and lowered the barrier to entry for many up and coming developers.

Of course, the reign of Visual Basic was not meant to last. No programming language (or platform for that matter) stays golden forever. In 2002, Microsoft launched the object-oriented successor to Visual Basic called VB.NET. I can remember being so excited when it was released and I dove head first into learning all about the new Framework.

I have a confession to make. In all my excitement over the introduction of the .NET Framework, I hurriedly convinced one of my clients to let me rewrite one of his VB applications using VB.NET. Unfortunately, I made a mistake that many developers at that time did. I assumed that rewriting an application like this would be a simple conversion process. That I would just go in and simply swap one set of code for another and magically everything would work wonderfully.

That did not happen. In fact, the application I rewrote started to fall down in production almost immediately. It experienced huge performance problems. In short, it was a disaster. I had actually taken something that was working quite well and turned it into soup.

The problem was that VB and VB.NET were so fundamentally different. Design patterns that worked well in VB, failed miserably in VB.NET.

What I should have done was to start slowly.  Rather than try to convert an existing VB application to using the new .NET Framework, I should have looked at what I needed to do to make the .NET application perform well from the very beginning. I should have learned about best practices and really understood how different the new object-oriented approach to application design would be.

Eventually, I did do all those things, and also switched to using C# (which is much better imho), but only after I messed up my poor clients original VB application. Live and learn, I say. No one is perfect and we all make mistakes. The trick is to learn from them.

I feel like I have learned from mine. But the funny thing is that I can see a familiar pattern emerging now in the world of Salesforce development. I can see how the introduction of the Lightning framework will bring about some of the same challenges for Salesforce developers transitioning from Visualforce as there was for Microsoft developers transitioning from VB to .NET.

VBToLightningSmaller

Some VB developers transitioning to .NET were never able to make the transition successfully and their careers suffered as a result. I imagine this might happen in the Salesforce world too and there will be Visualforce developers that stay Visualforce developers.

Of course, Visualforce is not going away anytime soon. But, anyone that believes it will not go away eventually is just kidding themselves. Salesforce is firmly committed to Lightning and it is no doubt the future of Salesforce development.

So, what should you do if you are a Salesforce developer that knows a lot about Visualforce?

You should embrace the new Lightning development framework and seek to understand how it differs from traditional Visualforce development. It really is like comparing apples and oranges. Begin by checking out this excellent Trail called Applying Visualforce Skills to Lightning. It helps to warn you about some of potential pitfalls you may encounter.

Just like with VB and .NET, design patterns that worked well in Visualforce, will fail in the world of Lightning. You could easily make an application perform worse if you just attempt to swap one set of code for another.

And so this is a good time for me to tell you about a new course I just started to design for Pluralsight. It will be titled Lightning Component Development Best Practices and I hope to release it before the end of the year.

In the meantime, you can also check out my latest course on Pluralsight titled,  Customizing Salesforce with Lightning Components. I have an entire module dedicated to Working with Lightning Data Service and using Base Lightning Components, which are definitely best practices Lightning developers should be using now.

And stay tuned because I will be covering many best practice topics (such as this one about Conditional Rendering in Lightning) on this blog in the months to come.