Programming Scripts Articles - Page 23 of 37

For the browser to browser connection, follow the below-given steps −All the following library −Create a peer −For creating a peer, you need to get a free API key.var peer = new Peer('pick-an-id', {key: 'myapikey'});Connect −var conn = peer.connect('another-peers-id'); conn.on('open', function(){    conn.send('Welcome!'); });

The canvas always scales from its current origin. The default origin is [0, 0]. If you want to scale from another point, you can first do ctx.translate(desiredX, desiredY);. This will reset the origin of the canvas to [desiredX, desiredY].The translate() method remaps the (0, 0) position on the canvas. The scale() method scales the current drawing, bigger or smaller. If you want to translate() the canvas context by your offset, you need to first scale() it to zoom in or out, and then translate() back by the opposite of the mouse offset.These steps are given in the following examplectx.translate(pt.x, pt.y); ... Read More

Use the autofocus attribute to place the cursor in the text box when a page loads. The autofocus attribute is a Boolean attribute. When present, it specifies that an element should automatically get focus when the page loads. Here is an example −Example                    Name:          Subject:                    

The date picker in HTML5 shows a popup like a calendar. This is the same as selecting the months and years and this adds the date. Example: Style options for HTML date pickerYou can also customize the popup and add background color as well. You can try to run the following code to add style options for HTML date picker − ::-webkit-datetime-edit { padding: 4 em; } ::-webkit-datetime-edit-fields-wrapper { background:blue; } ::-webkit-datetime-edit-text { padding: 0 0.5em; } Editing a month, day and year field The following is to edit a month, day and year field − ::-webkit-datetime-edit-month-field { color: white; } ::-webkit-datetime-edit-day-field { color: red; } ::-webkit-datetime-edit-year-field { color: red; } ::-webkit-calendar-picker-indicator { background:gray; }

For web page icon on iPhone or iPad, use the Apple Touch Icon or apple-touch-icon.png file. This icon is used when someone adds your web page as a bookmark.For multiple icons with different device resolutions like iPhone or iPad, add sizes attribute to each link element as follows −Set size The icon with the appropriate size for the device is used.

Convert videos to proper formats for HTML5 video on Linux shell using ffmpeg.When converting to an MP4, you want to use the h264 video codec and the aac audio codec because IE11 and earlier only support this combination.   ffmpeg -i input.mov -vcodec h264 -acodecaac -strict -2 output.mp4In this example, input.mov is converted to output2.mp4 with maximum compatibility, with Quicktime support, and without an audio stream. ffmpeg -an -i input.mov -vcodec libx264 -pix_fmt yuv420p -profile:v baseline -level 3 output2.mp4For Firefox compatible ogg video,  ffmpeg2theora should be installed.  Here the input file is output file from the ffmpeg conversion done before. ... Read More

The elements of type date allows user to enter date, using a text box or using date picker. With the ng-model directive, bins the values of AngularJS application data to HTML input controls. Firefox does not currently support type="date". It will convert all the values to string. Sinceyou want date to be a real Date object and not a string, so we create another variable, and then link the two variables as done in the below given code function MainCtrl($scope, dateFilter) {    $scope.date = new Date();    $scope.$watch('date', function (date){       $scope.dateString = dateFilter(date, 'yyyy-MM-dd');   ... Read More

The tag specifies video. Currently, there are 3 supported video formats for the element that are MP4, WebM, and Ogg. Autoplay is used to start the video when the video and page loads.The loop attribute is a boolean attribute. When present, it specifies that the video will start over again, every time it is finished.The loop attribute should do it. Your browser does not support the video element. If you have a problem with the loop attribute, listen to the videoEnd event. After that call the play() method when it fires.

Video files on the web sometimes need to be encoded in a special way in order for them to be played while downloading. In order for flash-based videos to work, data should be moved from the end to the start of the stream. A program called mp4 FastStart can do this for you.Programs like HandBrake have a "web" option that also does this when encoding. You need to ensure that your web server is not applying to gzip or deflate compression on top of the compression in the mp4 file.Compression allows your webserver to provide smaller file sizes, which load ... Read More

The tag is used to add video, with the following video formats − MP4, WebM and OggOn selecting a file via the input element.The change event is firedThe event is fired for , , and elements when a change to the element's value is performed by the user.Getting File objectThe File interface provides information about files and allows JavaScript in a web page to access the content. Object of this type is returned by the files property of the HTML element, which eventually lets you access the list of files selected with the element.Object URL pointing ... Read More