How To Display A Message If Javascript Is Turned Off

Having an accessible website is very important it means that you are not neglecting any potential customers coming on to your site and being able to use it correctly.

But what do you do when the visitors comes on your website but hasn't got the browser functionality turned on to use your site. Javascript is one of the main browser features you need to look for and be aware of what to do when this is turned off or turned on. Javascript allows you to do many things on your website from client-side form validation, slide shows, animations and changing HTML elements, there are loads of things you can do. But what if the visitor doesn't have Javascript enabled?

First you need to make sure that your site can work perfectly well without Javascript. Then you need to make sure that all validation is duplicated on both client and server side so you can catch things if Javascript is turned off. If you have something like a slide show which won't do anything if Javascript is turned off you might want to display a message to non-javascript users to say why is isn't working correctly.

The snippet below will display HTML in the browser if Javascript is turned off.

<noscript>
The slideshow is not working correctly because Javascript is turned off.
</noscript>

Moving To Javascript Development

Over the last couple of years there's been a growing trend in web development, this is the moving away from traditional back-end development and more to front-end development using Javascript.

This has been helped by the increase of nodeJS in web applications allowing Javascript to slowly but surely take over the world.

For many years PHP has been the leading web language, whether you like it or not it's market share has always won out for many years. This has now been overtaken by Javascript and it's easy to see why.

It moves away from the traditional web development approach of having to hire

• Frontend developer - Traditionally just converted PSDs to HTML and CSS
• Backend developer - PHP, Ruby, ASP.net who will code up the linking of the front-end to server
• Devops developers - To handle the server construction
• Mobile developers - Creating the ios and android apps
• Desktop application developers

In the current day Javascript developers can handle all these areas of development. Frontend development is no longer just processing HTML and CSS you can build the entire product in Javascript. It's used to handle events on your frontend, Javascript then becomes the API to process the data storing in JSON, NodeJS is now your web server and using something like React Native you can create native mobile apps in Javascript.

Now companies no longer have to hire 4 specialist developer positions as these can all be done by a Javascript developer. This shift from hiring 4 specialist developers to hiring 4 Javascript developers will not only massively improve the process of development but the speed of development too. No longer does each stage have to wait for a dependency from another developer in a different section of the app, each developer can cover all areas of the application.

You can see if you're a Javascript developer you have some good years coming to you.

• The JavaScript World Domination
• JavaScript Conquered the Web. Now It’s Taking Over the Desktop
• JavaScript Is Eating The World

I've been a PHP developer for many years and I can see the direction that the web is heading to be more Javascript development and away from traditional development processes.

So it's time to change my development practises and learn more about Javascript development. I've been using Javascript for over 15 years but have never used Javascript to build an entire website. So the question I ask when learning a new language/process is where do I start? How to I go about learning frontend development with Javascript?

Where To Start With Javascript Development?

This has been the hardest question to answer with Javascript development as there are so many good frameworks out there at the moment, which one do you choose?

• NodeJS
• AngularJS
• React
• VueJS
• Backbone
• Ember
• KnockoutJS
• Dojo
• Knockback
• CanJS
• Polymer
• Ampersand
• Flight
• TypeScript
• VanillaJS

This just names a few of the frameworks.

Which one do you choose?

I asked this question on Twitter, but I didn't want to just say what framework should I learn? I did some research and saw that the 2 main frameworks used are Angular or React. As these were the biggest with the largest communities and with the highest job prospects I wanted to go with one of these. Therefore I asked the question which framework should I learn Angular or React?

The replies I had to this tweet were very surprising, there was a mix between Angular and React with React coming slightly ahead. The surprising part was with the amount of people suggesting vue.js over any over framework.

Looking into Vue.js on github you can see how quickly this is gaining popularity and should be taken seriously. But looking at employability the main contenders are between Angular and React.

While searching for a comparison of the two frameworks I found this projectTodoMvc which is a Github repository that builds a simple To-do application using multiple different frameworks, this is a great way of comparing the different frameworks while they're performing the same actions.

TodoMvc

To see the code of the React Todo project you can view it here.

React Todo App

To see the code of Angular2 Todo project you can view it here.

Angular2 Todo App

To see the code of Vue.js Todo project you can view it here.

VueJs

Angular Vs React

As I'm not in a good position to compare these two frameworks so I've linked to the resources I used to make my decision.

• Angular 2 versus React: There Will Be Blood
• Comparison of Angular 2 and React
• Why React? Why not Angular 2?
• React vs Angular 2 - compare the incomparable?
• Angular vs React : A Side-By-Side Comparison

The main difference between these two is that Angular is a Javascript framework and React is a Javascript library, which means it's the difference between buying a complete computer compared with buying the parts to build your computer.

Going on what I've read in the above articles about both Angular 2 and React, I've decided React is a better framework for me to learn. But then I was thinking about what people were saying on Twitter and how most people replied with VueJs, so I had to consider this in my choice.

VueJs

Vue (pronounced /vjuː/, like view) is a progressive framework for building user interfaces. Unlike other monolithic frameworks, Vue is designed from the ground up to be incrementally adoptable. The core library is focused on the view layer only, and is very easy to pick up and integrate with other libraries or existing projects. On the other hand, Vue is also perfectly capable of powering sophisticated Single-Page Applications when used in combination with modern tooling and supporting libraries.

If you are an experienced frontend developer and want to know how Vue compares to other libraries/frameworks, check out the Comparison with Other Frameworks.

Compared with the other frameworks Vue looks very powerful, easy to learn and fast.

When using a language the size of the community is very important, the more people that use it the easier it is to find support. Looking at the top Javascript frameworks on Github you can see that Vue is gaining a lot of popularity.

As you can see from the image above Vue is 3rd most popular framework on Github behind Angular and React. When you consider the fact that Vue hasn't been around as long as the other two you can see it's going to catch up quickly.

Another point you need to look into when picking a language/framework is the progression of the product, if it hasn't been updated for a couple years then you don't really want to be using it. Vue have recently released version 2 of the framework increasing the speed of the framework.

Vue 2.0 Changes

Laravel

From Laravel 5.3 Vue is being included in the build and will be the focus to creating the front-end of your application. This is just the start of using Vue but this could mean the move away from Blade to be replaced with Vue.

This makes laravel a very good choice to use for the API of your app and use Vue to consume the API.

With Laravel making this move to include it in the build you will see a lot more people taking up Vue for their applications as opposed to React or Angular. For these reasons I've chosen to start learning Vue as I believe in the next coming of years it will gain more and more popularity in front-end development.

What's your opinions on the different frameworks?

Create Organization ( Company ) chart with gojs

Download the file.

https://drive.google.com/open?id=0B9cPcFcKq6vnbWM0X3ZzNkVsSXc



For more details Visit.

http://gojs.net/latest/samples/orgcharteditor.html


Note : for removing gojs reference text replace gojs.js with org-chart.js :-) 

Feedback are always Welcome.

lazyload Image

JQuery

$(window).bind("load", function(){
 var timeout = setTimeout(function() {
  $('.lazyload1second').each(function(){      
   $(this).attr('src', $(this).attr('original_link')).fadeIn(700);
   $(this).removeAttr('original_link');   
  });
 }, 500);
});

HTML

width="100%"  src="//www.example.com/images/right_banner_loader.jpg" original_link="https://example.blob.core.windows.net/images/offers/website.jpg?v3=3" alt="True Rupees" class="lazyload1second">

Replace Or hide Broken Image

// Replace source
$('img').error(function(){
        $(this).attr('src', 'missing.png');
});

// Or, hide them
$("img").error(function(){
        $(this).hide();
});

Display Image Preview Be four Uploading Image.

See Live Demo.

http://stackoverflow.com/a/12369027


HTML

   type='file' onchange="readURL(this);" />
     id="blah" src="#" alt="your image" />

JQuery

function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();

            reader.onload = function (e) {
                $('#blah')
                    .attr('src', e.target.result)
                    .width(150)
                    .height(200);
            };

            reader.readAsDataURL(input.files[0]);
        }
}

JavaScript – Confirm Before Window is Closed

Here is the JavaScript code:

1 2 3 4 5 6 7 8 9 10

/** Confirms when closing the window **/ function checkClose() {     $("#s_scan_number").focus();     return "Please DON'T close the window. Use the form button on the bottom."; } window.onbeforeunload = checkClose;   //to remove the confirmation dynamically: window.onbeforeunload = null;