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To draw lines with continuously varying line width, you can try to run the following code −Examplevar context = document.getElementById('canvas1').getContext('2d'); var pts = [null, null, null, null]; for(var i=-1; i
To listen to KeyDown events, use −if(keyIsPressed && keycode == somenumber) { doSomething(); }To capture KeyDown −var canvas1 = layer.getCanvas()._canvas; $(canvas1).attr('tabindex', 1); canvas1.focus(); $(canvas1).keydown(function (event) { console.log(event); });
We can do this with the help of lower() with column name. Firstly, we will create a table with the help of CREATE command.Creating a table −mysql> CREATE table InCaseSensDemo -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (0.50 sec)Inserting records into the table with the help of INSERT command −mysql> INSERT into InCaseSensDemo values('JOhN'); Query OK, 1 row affected (0.11 sec) mysql> INSERT into InCaseSensDemo values('bob'); Query OK, 1 row affected (0.21 sec) mysql> INSERT into InCaseSensDemo values('BoB'); Query OK, 1 row affected (0.13 sec) mysql> INSERT into InCaseSensDemo values('Bob'); Query OK, ... Read More
The HTML tag is used to create an inline frame.Example HTML iframe Tag The srcdoc attribute specifies the HTML content of the page to show in the iframeAn alternative of the srcdoc attribute will be −var doc = document.querySelector('#demo').contentWindow.document; var content = ''; doc.open('text/html', 'replace'); doc.write(content); doc.close();
Firstly, we will create a table with the help of CREATE command.Creating a table −mysql> CREATE table InCaseSensDemo -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (0.50 sec)Inserting records into the table with the help of INSERT command −mysql> INSERT into InCaseSensDemo values('JOhN'); Query OK, 1 row affected (0.11 sec) mysql> INSERT into InCaseSensDemo values('bob'); Query OK, 1 row affected (0.21 sec) mysql> INSERT into InCaseSensDemo values('BoB'); Query OK, 1 row affected (0.13 sec) mysql> INSERT into InCaseSensDemo values('Bob'); Query OK, 1 row affected (0.18 sec)Displaying all the records with the help of ... Read More
Yes, a user can disable HTML5 sessionStorage.It is easy to prevent browsers from accepting localStorage and sessionStorage. Let us see the settings for web browsers −Firefox Type “about config” in the address bar and press. This would show the internal browser settings. Move to dom.storage.enabled“, you need to right-click and Toggle to disable the DOM Storage.In Internet Explorer, You need to select “Extras”, “Internet Options”, “Advanced” Tab. Now go to “Security” and uncheck “Enable DOM-Storage”Google Chrome In Google Chrome, you need to open “Options”, then select “Under the Hood” Tab.Click “Content settings…”, then select “Cookies” and you need to set ... Read More
To select a column name with spaces, use the back tick symbol with column name. The symbol is ( ` `). Back tick is displayed in the keyboard below the tilde operator ( ~).Firstly, create a table −mysql> CREATE table SpaceColumn -> ( -> `Student Name` varchar(100) -> ); Query OK, 0 rows affected (0.48 sec)Inserting recordsmysql> INSERT into SpaceColumn values('John'); Query OK, 1 row affected (0.18 sec) mysql> INSERT into SpaceColumn values('Bob'); Query OK, 1 row affected (0.17 sec)The syntax to get column name with space is as follows −SELECT `column_name` from yourTableName; Now I will apply the ... Read More
You can try to run the following code to take a snapshot of HTML5-JavaScript-based video player −Example Snapshot var video = document.querySelector('video'); var canvas = document.querySelector('canvas'); var context = canvas.getContext('2d'); var myWidth, myHeight, ratio; video.addEventListener('loadedmetadata', function() { ratio = video.videoWidth/video.videoHeight; myWidth = video.videoWidth-100; myHeight = parseInt(w/ratio,10); canvas.width = myWidth; canvas.height = myHeight; },false); function snap() { context.fillRect(0,0,myWidth,myHeight); context.drawImage(video,0,0,myWidth,myHeight); }
To draw large font properly in HTML5 Canvas, you can try to run the following code −var myCanvas = document.getElementById("myCanvas"); var context = myCanvas.getContext("2d"); context.font = '180pt Georgia'; context.strokeStyle = "#FF0000"; context.fillStyle = "#FFFFFF "; context.lineWidth = 34; context.fillText("Demo!",0,200); context.strokeText("Demo!",0,200);
HTML5 Geolocation API lets you share your location with your favorite web sites. A JavaScript can capture your latitude and longitude, can be sent to backend web server, and do fancy location-aware things like finding local businesses or showing your location on a map.ExampleLet us see how to get the current position − function showLocation(position) { var latitude = position.coords.latitude; var longitude = position.coords.longitude; alert("Latitude : " + latitude + " ... Read More