1602255180
Lazy loading is not a new concept. It has been available for quite some time. In essence, lazy loading means that a component or a part of code must get loaded when it is required. It is also referred to as code splitting
and data fetching
.
Talking about React
specifically, it bundles the complete code and deploys all of it at the same time. Now, usually, that’s not a bad idea, since React SPAs (Single page application) are quite small and do not affect the performance. But what if we have a gigantic application, like a content management system with a customer portal, admin portal etc. In such a case, it does not seem like a smart idea to load the complete application.
In this post, I will try to explain the advantages of lazy loading and how to implement it in React
.
In situations where we know that certain code/features will not be accessible to all the users or the user does not access it frequently, it is best to load them when the user requests for it. This improves user experience as well as initial loading time.
For example, let’s consider that our application has two sections, A
and B
. Size of A is 1 MB and its loading time is approximately 1 second. Size of B is also 1 MB and so its loading time is also 1 second. And we know that a user will access either of the sections, or a user accessing section A will rarely access section B and vice versa. If we were to load the complete application at the starting of our application, it would cost the user 2 MB of data and the loading time will also be 2 seconds. The user might not like to wait for 2 seconds or won’t be happy that a site is costing them a lot of data. This can be improved and halved with proper lazy loading.
#react #lazy loading #react suspense
1598839687
If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?
In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.
Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.
React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.
Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.
Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.
The popularity of React Native comes from its advantages. Some of its advantages are as follows:
Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.
React Native is very close to native. Consider the following aspects as described on the React Native website:
Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.
#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native
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Run C# scripts from the .NET CLI, define NuGet packages inline and edit/debug them in VS Code - all of that with full language services support from OmniSharp.
Name | Version | Framework(s) |
---|---|---|
dotnet-script (global tool) | net6.0 , net5.0 , netcoreapp3.1 | |
Dotnet.Script (CLI as Nuget) | net6.0 , net5.0 , netcoreapp3.1 | |
Dotnet.Script.Core | netcoreapp3.1 , netstandard2.0 | |
Dotnet.Script.DependencyModel | netstandard2.0 | |
Dotnet.Script.DependencyModel.Nuget | netstandard2.0 |
The only thing we need to install is .NET Core 3.1 or .NET 5.0 SDK.
.NET Core 2.1 introduced the concept of global tools meaning that you can install dotnet-script
using nothing but the .NET CLI.
dotnet tool install -g dotnet-script
You can invoke the tool using the following command: dotnet-script
Tool 'dotnet-script' (version '0.22.0') was successfully installed.
The advantage of this approach is that you can use the same command for installation across all platforms. .NET Core SDK also supports viewing a list of installed tools and their uninstallation.
dotnet tool list -g
Package Id Version Commands
---------------------------------------------
dotnet-script 0.22.0 dotnet-script
dotnet tool uninstall dotnet-script -g
Tool 'dotnet-script' (version '0.22.0') was successfully uninstalled.
choco install dotnet.script
We also provide a PowerShell script for installation.
(new-object Net.WebClient).DownloadString("https://raw.githubusercontent.com/filipw/dotnet-script/master/install/install.ps1") | iex
curl -s https://raw.githubusercontent.com/filipw/dotnet-script/master/install/install.sh | bash
If permission is denied we can try with sudo
curl -s https://raw.githubusercontent.com/filipw/dotnet-script/master/install/install.sh | sudo bash
A Dockerfile for running dotnet-script in a Linux container is available. Build:
cd build
docker build -t dotnet-script -f Dockerfile ..
And run:
docker run -it dotnet-script --version
You can manually download all the releases in zip
format from the GitHub releases page.
Our typical helloworld.csx
might look like this:
Console.WriteLine("Hello world!");
That is all it takes and we can execute the script. Args are accessible via the global Args array.
dotnet script helloworld.csx
Simply create a folder somewhere on your system and issue the following command.
dotnet script init
This will create main.csx
along with the launch configuration needed to debug the script in VS Code.
.
├── .vscode
│ └── launch.json
├── main.csx
└── omnisharp.json
We can also initialize a folder using a custom filename.
dotnet script init custom.csx
Instead of main.csx
which is the default, we now have a file named custom.csx
.
.
├── .vscode
│ └── launch.json
├── custom.csx
└── omnisharp.json
Note: Executing
dotnet script init
inside a folder that already contains one or more script files will not create themain.csx
file.
Scripts can be executed directly from the shell as if they were executables.
foo.csx arg1 arg2 arg3
OSX/Linux
Just like all scripts, on OSX/Linux you need to have a
#!
and mark the file as executable via chmod +x foo.csx. If you use dotnet script init to create your csx it will automatically have the#!
directive and be marked as executable.
The OSX/Linux shebang directive should be #!/usr/bin/env dotnet-script
#!/usr/bin/env dotnet-script
Console.WriteLine("Hello world");
You can execute your script using dotnet script or dotnet-script, which allows you to pass arguments to control your script execution more.
foo.csx arg1 arg2 arg3
dotnet script foo.csx -- arg1 arg2 arg3
dotnet-script foo.csx -- arg1 arg2 arg3
All arguments after --
are passed to the script in the following way:
dotnet script foo.csx -- arg1 arg2 arg3
Then you can access the arguments in the script context using the global Args
collection:
foreach (var arg in Args)
{
Console.WriteLine(arg);
}
All arguments before --
are processed by dotnet script
. For example, the following command-line
dotnet script -d foo.csx -- -d
will pass the -d
before --
to dotnet script
and enable the debug mode whereas the -d
after --
is passed to script for its own interpretation of the argument.
dotnet script
has built-in support for referencing NuGet packages directly from within the script.
#r "nuget: AutoMapper, 6.1.0"
Note: Omnisharp needs to be restarted after adding a new package reference
We can define package sources using a NuGet.Config
file in the script root folder. In addition to being used during execution of the script, it will also be used by OmniSharp
that provides language services for packages resolved from these package sources.
As an alternative to maintaining a local NuGet.Config
file we can define these package sources globally either at the user level or at the computer level as described in Configuring NuGet Behaviour
It is also possible to specify packages sources when executing the script.
dotnet script foo.csx -s https://SomePackageSource
Multiple packages sources can be specified like this:
dotnet script foo.csx -s https://SomePackageSource -s https://AnotherPackageSource
Dotnet-Script can create a standalone executable or DLL for your script.
Switch | Long switch | description |
---|---|---|
-o | --output | Directory where the published executable should be placed. Defaults to a 'publish' folder in the current directory. |
-n | --name | The name for the generated DLL (executable not supported at this time). Defaults to the name of the script. |
--dll | Publish to a .dll instead of an executable. | |
-c | --configuration | Configuration to use for publishing the script [Release/Debug]. Default is "Debug" |
-d | --debug | Enables debug output. |
-r | --runtime | The runtime used when publishing the self contained executable. Defaults to your current runtime. |
The executable you can run directly independent of dotnet install, while the DLL can be run using the dotnet CLI like this:
dotnet script exec {path_to_dll} -- arg1 arg2
We provide two types of caching, the dependency cache
and the execution cache
which is explained in detail below. In order for any of these caches to be enabled, it is required that all NuGet package references are specified using an exact version number. The reason for this constraint is that we need to make sure that we don't execute a script with a stale dependency graph.
In order to resolve the dependencies for a script, a dotnet restore
is executed under the hood to produce a project.assets.json
file from which we can figure out all the dependencies we need to add to the compilation. This is an out-of-process operation and represents a significant overhead to the script execution. So this cache works by looking at all the dependencies specified in the script(s) either in the form of NuGet package references or assembly file references. If these dependencies matches the dependencies from the last script execution, we skip the restore and read the dependencies from the already generated project.assets.json
file. If any of the dependencies has changed, we must restore again to obtain the new dependency graph.
In order to execute a script it needs to be compiled first and since that is a CPU and time consuming operation, we make sure that we only compile when the source code has changed. This works by creating a SHA256 hash from all the script files involved in the execution. This hash is written to a temporary location along with the DLL that represents the result of the script compilation. When a script is executed the hash is computed and compared with the hash from the previous compilation. If they match there is no need to recompile and we run from the already compiled DLL. If the hashes don't match, the cache is invalidated and we recompile.
You can override this automatic caching by passing --no-cache flag, which will bypass both caches and cause dependency resolution and script compilation to happen every time we execute the script.
The temporary location used for caches is a sub-directory named dotnet-script
under (in order of priority):
DOTNET_SCRIPT_CACHE_LOCATION
, if defined and value is not empty.$XDG_CACHE_HOME
if defined otherwise $HOME/.cache
~/Library/Caches
Path.GetTempPath
for the platform.The days of debugging scripts using Console.WriteLine
are over. One major feature of dotnet script
is the ability to debug scripts directly in VS Code. Just set a breakpoint anywhere in your script file(s) and hit F5(start debugging)
Script packages are a way of organizing reusable scripts into NuGet packages that can be consumed by other scripts. This means that we now can leverage scripting infrastructure without the need for any kind of bootstrapping.
A script package is just a regular NuGet package that contains script files inside the content
or contentFiles
folder.
The following example shows how the scripts are laid out inside the NuGet package according to the standard convention .
└── contentFiles
└── csx
└── netstandard2.0
└── main.csx
This example contains just the main.csx
file in the root folder, but packages may have multiple script files either in the root folder or in subfolders below the root folder.
When loading a script package we will look for an entry point script to be loaded. This entry point script is identified by one of the following.
main.csx
in the root folderIf the entry point script cannot be determined, we will simply load all the scripts files in the package.
The advantage with using an entry point script is that we can control loading other scripts from the package.
To consume a script package all we need to do specify the NuGet package in the #load
directive.
The following example loads the simple-targets package that contains script files to be included in our script.
#load "nuget:simple-targets-csx, 6.0.0"
using static SimpleTargets;
var targets = new TargetDictionary();
targets.Add("default", () => Console.WriteLine("Hello, world!"));
Run(Args, targets);
Note: Debugging also works for script packages so that we can easily step into the scripts that are brought in using the
#load
directive.
Scripts don't actually have to exist locally on the machine. We can also execute scripts that are made available on an http(s)
endpoint.
This means that we can create a Gist on Github and execute it just by providing the URL to the Gist.
This Gist contains a script that prints out "Hello World"
We can execute the script like this
dotnet script https://gist.githubusercontent.com/seesharper/5d6859509ea8364a1fdf66bbf5b7923d/raw/0a32bac2c3ea807f9379a38e251d93e39c8131cb/HelloWorld.csx
That is a pretty long URL, so why don't make it a TinyURL like this:
dotnet script https://tinyurl.com/y8cda9zt
A pretty common scenario is that we have logic that is relative to the script path. We don't want to require the user to be in a certain directory for these paths to resolve correctly so here is how to provide the script path and the script folder regardless of the current working directory.
public static string GetScriptPath([CallerFilePath] string path = null) => path;
public static string GetScriptFolder([CallerFilePath] string path = null) => Path.GetDirectoryName(path);
Tip: Put these methods as top level methods in a separate script file and
#load
that file wherever access to the script path and/or folder is needed.
This release contains a C# REPL (Read-Evaluate-Print-Loop). The REPL mode ("interactive mode") is started by executing dotnet-script
without any arguments.
The interactive mode allows you to supply individual C# code blocks and have them executed as soon as you press Enter. The REPL is configured with the same default set of assembly references and using statements as regular CSX script execution.
Once dotnet-script
starts you will see a prompt for input. You can start typing C# code there.
~$ dotnet script
> var x = 1;
> x+x
2
If you submit an unterminated expression into the REPL (no ;
at the end), it will be evaluated and the result will be serialized using a formatter and printed in the output. This is a bit more interesting than just calling ToString()
on the object, because it attempts to capture the actual structure of the object. For example:
~$ dotnet script
> var x = new List<string>();
> x.Add("foo");
> x
List<string>(1) { "foo" }
> x.Add("bar");
> x
List<string>(2) { "foo", "bar" }
>
REPL also supports inline Nuget packages - meaning the Nuget packages can be installed into the REPL from within the REPL. This is done via our #r
and #load
from Nuget support and uses identical syntax.
~$ dotnet script
> #r "nuget: Automapper, 6.1.1"
> using AutoMapper;
> typeof(MapperConfiguration)
[AutoMapper.MapperConfiguration]
> #load "nuget: simple-targets-csx, 6.0.0";
> using static SimpleTargets;
> typeof(TargetDictionary)
[Submission#0+SimpleTargets+TargetDictionary]
Using Roslyn syntax parsing, we also support multiline REPL mode. This means that if you have an uncompleted code block and press Enter, we will automatically enter the multiline mode. The mode is indicated by the *
character. This is particularly useful for declaring classes and other more complex constructs.
~$ dotnet script
> class Foo {
* public string Bar {get; set;}
* }
> var foo = new Foo();
Aside from the regular C# script code, you can invoke the following commands (directives) from within the REPL:
Command | Description |
---|---|
#load | Load a script into the REPL (same as #load usage in CSX) |
#r | Load an assembly into the REPL (same as #r usage in CSX) |
#reset | Reset the REPL back to initial state (without restarting it) |
#cls | Clear the console screen without resetting the REPL state |
#exit | Exits the REPL |
You can execute a CSX script and, at the end of it, drop yourself into the context of the REPL. This way, the REPL becomes "seeded" with your code - all the classes, methods or variables are available in the REPL context. This is achieved by running a script with an -i
flag.
For example, given the following CSX script:
var msg = "Hello World";
Console.WriteLine(msg);
When you run this with the -i
flag, Hello World
is printed, REPL starts and msg
variable is available in the REPL context.
~$ dotnet script foo.csx -i
Hello World
>
You can also seed the REPL from inside the REPL - at any point - by invoking a #load
directive pointed at a specific file. For example:
~$ dotnet script
> #load "foo.csx"
Hello World
>
The following example shows how we can pipe data in and out of a script.
The UpperCase.csx
script simply converts the standard input to upper case and writes it back out to standard output.
using (var streamReader = new StreamReader(Console.OpenStandardInput()))
{
Write(streamReader.ReadToEnd().ToUpper());
}
We can now simply pipe the output from one command into our script like this.
echo "This is some text" | dotnet script UpperCase.csx
THIS IS SOME TEXT
The first thing we need to do add the following to the launch.config
file that allows VS Code to debug a running process.
{
"name": ".NET Core Attach",
"type": "coreclr",
"request": "attach",
"processId": "${command:pickProcess}"
}
To debug this script we need a way to attach the debugger in VS Code and the simplest thing we can do here is to wait for the debugger to attach by adding this method somewhere.
public static void WaitForDebugger()
{
Console.WriteLine("Attach Debugger (VS Code)");
while(!Debugger.IsAttached)
{
}
}
To debug the script when executing it from the command line we can do something like
WaitForDebugger();
using (var streamReader = new StreamReader(Console.OpenStandardInput()))
{
Write(streamReader.ReadToEnd().ToUpper()); // <- SET BREAKPOINT HERE
}
Now when we run the script from the command line we will get
$ echo "This is some text" | dotnet script UpperCase.csx
Attach Debugger (VS Code)
This now gives us a chance to attach the debugger before stepping into the script and from VS Code, select the .NET Core Attach
debugger and pick the process that represents the executing script.
Once that is done we should see our breakpoint being hit.
By default, scripts will be compiled using the debug
configuration. This is to ensure that we can debug a script in VS Code as well as attaching a debugger for long running scripts.
There are however situations where we might need to execute a script that is compiled with the release
configuration. For instance, running benchmarks using BenchmarkDotNet is not possible unless the script is compiled with the release
configuration.
We can specify this when executing the script.
dotnet script foo.csx -c release
Starting from version 0.50.0, dotnet-script
supports .Net Core 3.0 and all the C# 8 features. The way we deal with nullable references types in dotnet-script
is that we turn every warning related to nullable reference types into compiler errors. This means every warning between CS8600
and CS8655
are treated as an error when compiling the script.
Nullable references types are turned off by default and the way we enable it is using the #nullable enable
compiler directive. This means that existing scripts will continue to work, but we can now opt-in on this new feature.
#!/usr/bin/env dotnet-script
#nullable enable
string name = null;
Trying to execute the script will result in the following error
main.csx(5,15): error CS8625: Cannot convert null literal to non-nullable reference type.
We will also see this when working with scripts in VS Code under the problems panel.
Download Details:
Author: filipw
Source Code: https://github.com/filipw/dotnet-script
License: MIT License
1577975746
While instant feedback from an app or website is best, sometimes your product won’t be able to adhere to speed guidelines. The slow response may be due to poor internet connection or the operation process may take a long time. For such cases, the designer must reassure the user that:
The application is working according to their requirements and the actual process is still active.
If you are unable to shorten the process, you should at least try to make the wait pleasant for your users. Here are 10 react loading components for your react.js application
Have you heard about react-content-loader? It’s a SVG component to create placeholder loading, like Facebook cards loading or also known as skeleton UI. So now you can use this online tool to create your own loader easily. You just need to draw using the canvas or code using the live editing!
View Demo: https://danilowoz.com/create-content-loader/
Github: https://github.com/danilowoz/create-content-loader
Download Link: https://github.com/danilowoz/create-content-loader/archive/master.zip
React-Loading is a React-based Loading animation component library includes many exquisite and beautiful loading components. It will effectively relieve the user’s anxiety when you give loading dynamics tips at the appropriate place and moment in your project. This component library supports on-demand loading, so pick a favorite Loading component now to enrich your project
View Demo: http://139.196.82.33:8080/iframe.html?id=demo–demo
Github: https://github.com/sixiaodong123/react-loading
Download Link: https://github.com/sixiaodong123/react-loading/archive/master.zip
Someone pointed out the React implementation of the list was a bit complex. I figure out it was possible to write an abstraction for this particular case. Here it is!
This component aims to stay easy to use. If your use case needs more options I recommend using directly awesome libraries from Brian Vaughn listed in dependencies section.
View Demo: https://codesandbox.io/s/magical-shockley-vhkz8
Github: https://github.com/frinyvonnick/react-simple-infinite-loading
Download Link: https://github.com/frinyvonnick/react-simple-infinite-loading/archive/master.zip
React Pure Loaders is a package that disponibilizes loaders for your Project. Those loaders are used as components, using color and a loading variables as properties.
The component expects the to receive the color as a string with the hexadecimal code and the loading as a boolean, that is true by default.
View Demo: https://reactpureloaders.io/
Github: https://github.com/jameswlane/react-pure-loaders
Download Link: https://github.com/jameswlane/react-pure-loaders
React component to manipulate the favicon, as a loading or progress indicator, for now. The idea of “Favicon as DOM” is under construction.
View Demo: https://foreseaz.github.io/react-loadcon/
Github: https://github.com/foreseaz/react-loadcon
Download Link: https://github.com/foreseaz/react-loadcon/archive/master.zip
The easiest way to manage loaders/errors inside a button. NOT an UI lib.
View Demo: https://codesandbox.io/s/w640yv5p9w
Github: https://github.com/slorber/react-nested-loader
Download Link: https://github.com/slorber/react-nested-loader/archive/master.zip
react-wait is a React Hook helps to manage multiple loading states on the page without any conflict. It’s based on a very simple idea that manages an Array of multiple loading states. The built-in loader component listens its registered loader and immediately become loading state.
View Demo: https://codesandbox.io/s/y3w5v5lk0j
Github: http://github.com/f/react-wait
Download Link: https://reactjsexample.com/complex-loader-management-hook-for-react/
A React component that provides Loading Bar (aka Progress Bar) for long running tasks.
Consists of:
View Demo: https://mironov.github.io/react-redux-loading-bar/
Github: http://github.com/mironov/react-redux-loading-bar
Download Link: https://github.com/mironov/react-redux-loading-bar/archive/master.zip
Images are ugly until they’re loaded. Materialize it with material image! It will fade in like the material image loading pattern suggests.
View Demo: https://mui.wertarbyte.com/#material-ui-image
Github: http://github.com/TeamWertarbyte/material-ui-image
Download Link: https://github.com/TeamWertarbyte/material-ui-image/archive/master.zip
React Component to lazy load images and other components/elements. Includes a HOC to track window scroll position to improve performance.
React Component to lazy load images and components using a HOC to track window scroll position.
View Demo: https://www.albertjuhe.com/react-lazy-load-image-component/
Github: http://github.com/Aljullu/react-lazy-load-image-component
Download Link: https://github.com/Aljullu/react-lazy-load-image-component/archive/master.zip
#loading #react-loading #react-loading-component #react #react-js
1615544450
Since March 2020 reached 556 million monthly downloads have increased, It shows that React JS has been steadily growing. React.js also provides a desirable amount of pliancy and efficiency for developing innovative solutions with interactive user interfaces. It’s no surprise that an increasing number of businesses are adopting this technology. How do you select and recruit React.js developers who will propel your project forward? How much does a React developer make? We’ll bring you here all the details you need.
Facebook built and maintains React.js, an open-source JavaScript library for designing development tools. React.js is used to create single-page applications (SPAs) that can be used in conjunction with React Native to develop native cross-platform apps.
In the United States, the average React developer salary is $94,205 a year, or $30-$48 per hour, This is one of the highest among JavaScript developers. The starting salary for junior React.js developers is $60,510 per year, rising to $112,480 for senior roles.
In context of software developer wage rates, the United States continues to lead. In high-tech cities like San Francisco and New York, average React developer salaries will hit $98K and $114per year, overall.
However, the need for React.js and React Native developer is outpacing local labour markets. As a result, many businesses have difficulty locating and recruiting them locally.
It’s no surprise that for US and European companies looking for professional and budget engineers, offshore regions like India are becoming especially interesting. This area has a large number of app development companies, a good rate with quality, and a good pool of React.js front-end developers.
As per Linkedin, the country’s IT industry employs over a million React specialists. Furthermore, for the same or less money than hiring a React.js programmer locally, you may recruit someone with much expertise and a broader technical stack.
React is a very strong framework. React.js makes use of a powerful synchronization method known as Virtual DOM, which compares the current page architecture to the expected page architecture and updates the appropriate components as long as the user input.
React is scalable. it utilises a single language, For server-client side, and mobile platform.
React is steady.React.js is completely adaptable, which means it seldom, if ever, updates the user interface. This enables legacy projects to be updated to the most new edition of React.js without having to change the codebase or make a few small changes.
React is adaptable. It can be conveniently paired with various state administrators (e.g., Redux, Flux, Alt or Reflux) and can be used to implement a number of architectural patterns.
Is there a market for React.js programmers?
The need for React.js developers is rising at an unparalleled rate. React.js is currently used by over one million websites around the world. React is used by Fortune 400+ businesses and popular companies such as Facebook, Twitter, Glassdoor and Cloudflare.
As you’ve seen, locating and Hire React js Developer and Hire React Native developer is a difficult challenge. You will have less challenges selecting the correct fit for your projects if you identify growing offshore locations (e.g. India) and take into consideration the details above.
If you want to make this process easier, You can visit our website for more, or else to write a email, we’ll help you to finding top rated React.js and React Native developers easier and with strives to create this operation
#hire-react-js-developer #hire-react-native-developer #react #react-native #react-js #hire-react-js-programmer
1602255180
Lazy loading is not a new concept. It has been available for quite some time. In essence, lazy loading means that a component or a part of code must get loaded when it is required. It is also referred to as code splitting
and data fetching
.
Talking about React
specifically, it bundles the complete code and deploys all of it at the same time. Now, usually, that’s not a bad idea, since React SPAs (Single page application) are quite small and do not affect the performance. But what if we have a gigantic application, like a content management system with a customer portal, admin portal etc. In such a case, it does not seem like a smart idea to load the complete application.
In this post, I will try to explain the advantages of lazy loading and how to implement it in React
.
In situations where we know that certain code/features will not be accessible to all the users or the user does not access it frequently, it is best to load them when the user requests for it. This improves user experience as well as initial loading time.
For example, let’s consider that our application has two sections, A
and B
. Size of A is 1 MB and its loading time is approximately 1 second. Size of B is also 1 MB and so its loading time is also 1 second. And we know that a user will access either of the sections, or a user accessing section A will rarely access section B and vice versa. If we were to load the complete application at the starting of our application, it would cost the user 2 MB of data and the loading time will also be 2 seconds. The user might not like to wait for 2 seconds or won’t be happy that a site is costing them a lot of data. This can be improved and halved with proper lazy loading.
#react #lazy loading #react suspense