How to Write a Great HTML5 App

There was a lot of enthusiasm for the platform at the San Francisco event. The growth in the number of programmers and content creators is indicative of how much interest there is in the format.

It is difficult to realize the promise of “write once, run everywhere” if you don’t know how much you have to learn about it. How does the community of tools vendors web design firms, standards bodies and experienced developers help these new developers have a great experience and make it equal to native application development experiences? Some thoughts about it.

Let’s define native apps first. I refer to it as either.

  • There are web apps that use onlyHTML5 code and no native device features. Web apps can run in a browser on any device.

There are apps that use onlyHTML,CSS, and Javascript. Web apps can run in a browser on any device. A hybrid app is one that uses native device features, such as a camera or accelerometer, and uses the device APIs. The various app stores package these apps.

Native apps are usually written in the native language of the platform they are written for. The materials needed for app store submission can be found on each platform.

Making native apps available on different platforms is the biggest problem. The app may need to be changed in the native language of the platform you are targeting. You don’t have to download or learn a new tool per platform if you use the same browser as the platform. There are a number of cross- platform tools that can be used to create applications for the web.

The solution to creating a cross- platform, runs-anywhere app is to write it in HTML5 This is the most difficult part. There are some things that need to be considered in order to perform well. It is important to understand these to ensure that standards, tools and developers’ experience withHTML5 continues to improve. There are three factors to keep in mind when creating an app.

Responsive design It is possible to write truly responsive apps. The user interface of the app will be changed according to the orientation of the device, as well as the browser and screen size. Responsive design is when an app responds in this way. This can be enabled by using any of the open source frameworks. The App DesignerUI layout tool can be used for responsive design tools. For more on responsive design, check out the article at http://alistapart.com. There is a video on one way to use the App DesignerUI layout tool to implement media query.

It is possible to write truly responsive apps. The user interface of the app will be changed according to the orientation of the device, as well as the browser and screen size. Responsive design is when an app responds in this way. This can be enabled by using any of the open source frameworks. The App DesignerUI layout tool can be used for responsive design tools. For more on responsive design, check out the article at http://alistapart.com. There is a video on one way to use the App DesignerUI layout tool to implement media query. Performance Compared to a desktop browser, the performance of the mobile app is much different. Poor choices in Javascript libraries can drag your app to a crawl. There is a different approach to programming for a desktop than there is for a mobile device. There are a few resources for understanding these issues. There will be differences among devices. Refer to http://caniuse.com for the level of support. Successful developers tend to select a subset of features to give them the function they need.

Compared to a desktop browser, the performance of the mobile app is much different. Poor choices in Javascript libraries can drag your app to a crawl. There is a different approach to programming for a desktop than there is for a mobile device. There are a few resources for understanding these issues. There will be differences among devices. Refer to http://caniuse.com for the level of support. Successful developers tend to select a subset of features to give them the function they need. The implementation of graphics and animation in a mobile app is doable despite the many detractors. You can build animated apps if you keep it simple. The native app developer is the best person to reach for the highest speed 3-D graphics. The default performance of the webview canvas can be improved by using hybrid canvas solutions from several vendors.

If you keep in mind these few things, you can save the effort of having to rewrite an app for multiple platforms. The development experience of the tools and frameworks used in the development of HTML5 is continually improved to allow it to run anywhere.

The only thing left is where is. Is it a phone or a device? Those are clear. What about a television, a car, or the internet of things.

The Product Manager is Joe Wolf.

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