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Articles by Swarali Sree
48 articles
How to draw a quadratic curve on HTML5 Canvas?
The HTML5 tag is used to draw graphics, animations, etc. using scripting. It is a new tag introduced in HTML5. The canvas element has a DOM method called getContext, which obtains rendering context and its drawing functions. This function takes one parameter, the type of context 2d.To draw a Quadratic curve with HTML5 canvas, use the quadraticCurveTo() method. This method adds the given point to the current path, connected to the previous one by a quadratic Bezier curve with the given control point.You can try to run the following code to learn how to draw a quadratic curve on ...
Read MoreShould I use <img>, <object>, or <embed> for SVG files?
To add SVG files, you can use , or element in HTML. Choose any one of them according to your requirement. Here’s how you can add SVG, elementUse the tag for images without interaction.The disadvantage is you cannot manipulate images with JavaScript. elementThe element is used to define an embedded object within an HTML document. Use it to embed multimedia like audio, video, flash, etc in the web page. Your browser does not support SVG elementThe tag wasn’t part of the HTML 4 specification and is new in HTML5. It validates in an HTML5 page.
Read MoreHow to use .svg files in a webpage?
The svg files are Scalable Vector Graphics. You can add it to a web page using the , , or tag.The .svg file is to be referenced in the src attribute of the tag. Let’s see how to add it using the tag.You can try to run the following code to learn how to use .svg files in a web page. We have a smiley.svg file − HTML SVG Design
Read MoreHow to set the width of the outline around an element with JavaScript?
To set the outline width, use the outlineWidth property. You can try to run the following code to set the width of the outline around an element with JavaScript −ExampleLive Demo #box { width: 450px; background-color: orange; border: 3px solid red; margin-left: 20px; } Click below to add Outline Width. ...
Read MoreHow to set the margins of an element with JavaScript?
Use the margin property in JavaScript, to set the margins. You can try to run the following code to set the margins of an element with JavaScript −ExampleLive Demo Set all four margins This is demo text. function display() { document.getElementById("myID").style.margin = "30px 20px 40px 40px"; }
Read MoreWhich event occurs in JavaScript when a dragged element is dropped?
The ondrop event triggers when a dragged element is dropped on the target. You can try to run the following code to learn how to implement ondrop event in JavaScript −ExampleLive Demo .drag { float: left; width: 100px; height: 35px; border: 2px dashed #876587; margin: 15px; padding: 10px; } ...
Read MoreWhy do we need to change the delimiter for creating a trigger?
As we know that in MySQL we use the delimiter semicolon (;) to end each statement. The semicolon is the by default delimiter in MySQL. We need to change the delimiter, while creating a trigger, to tell MySQL that this is not the end of our trigger statement because we can use multiple statements in the trigger. We can change the delimiter temporarily by DELIMITER // statement to change the delimiter from Semicolon (;) to two back-slash (//). After this MySQL would know that the triggering statement only ends when it encounters a two back-slash (//). Following is an example ...
Read MoreHow can we nest a subquery within another subquery?
If a subquery is nested inside another subquery then it is called a nested subquery. To make it understand we are creating the nested subquery from the following tables data −mysql> Select * from Cars; +------+--------------+---------+ | ID | Name | Price | +------+--------------+---------+ | 1 | Nexa | 750000 | | 2 | Maruti Swift | 450000 | | 3 | BMW | 4450000 | | 4 | VOLVO | 2250000 | | 5 | Alto ...
Read MoreHow can group functions be used in ORDER BY clause?
We can sort the result set groups by using group functions in the ORDER BY clause. By default, the sort order is ascending but we can reverse it by using DESC keyword.Examplemysql> Select designation, YEAR(Doj), count(*) from employees GROUP BY designation, YEAR(DoJ) ORDER BY Count(*) DESC; +-------------+-----------+----------+ | designation | YEAR(Doj) | count(*) | +-------------+-----------+----------+ | Prof | 2009 | 2 | | Asst.Prof | 2015 | 1 | | Asst.Prof | 2016 | 1 | | Prof ...
Read MoreHow can I use MySQL INTERVAL() function with a column of a table?
We can use INTERVAL() function with a column of a table by providing the first argument as the name of the column. In this case, al the values in that column would be compared with the values given as the other arguments of INTERVAL() function and on that basis of comparison, the result set is provided. To understand it, the data from the employee table is used which is as follows −mysql> Select* from employee568; +----+--------+--------+ | ID | Name | Salary | +----+--------+--------+ | 1 | Gaurav | 50000 | | 2 | Rahul | 20000 | | ...
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