HTML5 canvas API enables the developers to write text on an HTML page in the different ways such as in a canvas. Different browsers provide various kinds of font sizes on the HTML5 canvas specially when the font sizes are floating numbers like 2.456 px, 3.4 px etc. So, how to apply fractional font size to a text in an HTML5 canvas? First, let’s see what HTML5 canvas is. What is a HTML5 Canvas? Basically, canvas is rectangular enclosed area in a web page. By default, it has no border and content. The canvas element of HTML5 enables the user ... Read More

Use the ember-localstorage adapter.App.store = DS.Store.create({    revision: 11,    adapter: DS.LSAdapter.create() });ExampleYou need to define the adapter you want to use for client-side storage −App.Store = DS.SyncStore.extend({    revision: 10,    adapter: DS.IndexedDB.adapter({       mappings: {          person: App.Person,          persons: App.Person,          contact: App.Contact,          contacts: App.Contact       }    }) });

Suppose you want the browser to do complex calculations on web page on clicking a word. This will take time. So, the web page will become unresponsive until the operation is completed. You need something which will do the required operation silently without affecting the user interface. So, how to solve this problem. In this article, we will discuss about how to solve such issues. The solution is Web workers. But what is a web worker? Let’s see. What is a Web Worker? A web worker is an object consisting of Javascript codes which runs behind the web page ... Read More

While logging in i.e. online, you need to first authenticate against the server and if it works, store the username and a hashed password in the database.If you can find the account in the database, then you need to generate a new hash, only if the user has changed the password since the last time he logged.You need to also authenticate against the local database. Log in using the online version of the app at least once.

HTML5 canvas allows the users to draw or create 2D graphics in any web page. Suppose you want to crop a part of the canvas created on the web page and export it to any other area of the web page, then you can do it using javascript. For example, you have an image in the canvas and you want to export a part of image of dimension 400px * 260px. In this article, we will learn how to execute the above using few javascript codes. To learn further, let us first considering understanding what HTML5 Canvas is What is ... Read More

While doing a print style sheet, you need various HTML5 tags like , , , etc., which are used for different layout options to your web page which is to be printed. Chrome, Firefox and Internet Explorer9 enables the users to use such HTML5 tags in their browsers. However, Internet Explorer 6-8, Safari 4x and other such older browsers does not support those tags due to which we can’t apply those layout options in the web page. So, how can we use those HTML5 tags in Internet Explorer 8? For this, you can use html5.shiv. First let’s understand about ... Read More

Suppose you want to make a quiz app. In it, if you click the wrong option, an audio will be played in the background saying “wrong answer”. But if you click two or more options simultaneously which are wrong, you won’t be able to hear the sound as many times wrong answer is clicked at the same time. So, how to resolve this issue. In this article, you will see if you can play the same sound more than once at the same time with HTML5 or not. The answer is Yes!!! There are two methods for doing so. Let ... Read More

Use the oncanplaythrough event to completely preload video. You can try to run the following code.Example                                        Your browser does not support the video element.                      function display() {             alert("Can be played without pausing for buffering.");         }

If you want to add a date picker which includes the year, month and day, in your webpage, then HTML5 facilitates a “date” field for you. It is a type in element. It works well in various web browsers like Google chrome, Internet Explorer and Firefox. Here we are going to learn about how it works in Safari which is also a web browser. First let’s see about Safari. Safari Safari is a graphical web browser developed by Apple for its users. It is basically an open source software, specifically designed for all Apple devices. It runs on ... Read More

In a thermometer, as the temperature increases, the mercury in it rises up too. Vice versa is the case for lowering the temperature. Similarly, if you want to create such effect on a webpage, it is done by the range type of input element in HTML5. This is known as range for vertical orientation. The most common use of the slider input is when we know the lower and higher margins. For instance, if we are developing a website that records the temperature of different places. You can have the temperatures as a sliding input range. It was possible to ... Read More