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In this article, we are going to learn how to iterate a JavaScript object’s properties using jQuery. The simplest way to iterate over an object with JavaScript is to use a for in loop. The for statement will iterate over the objects as an array, but the loop will send the key to the object instead of an index as a parameter. This loop is used to iterate over all non-Symbol iterative properties of an object. The hasOwnProperty() method can be used to check if the property belongs to the object itself. The value of each key of the ... Read More
In this article, we are going to discuss how to work with JavaScript Drag and drop for touch devices in JavaScript. Using JavaScript, we can only drag an image and some text. To drag an image, we simply hold the mouse button down and then move it. To drag the text, we need to highlight some text and drag it in the same way as image. HTML5 specifies almost all elements can be draggable. To make an element draggable, we add the draggable property with the value of true to its HTML element tag. Syntax Following is the syntax ... Read More
In this article we are going to try how to secretly copy a JavaScript function to the clipboard. We use the copytext() method to secretly copy JavaScript function to the clipboard. These functions work on JavaScript console as well. To understand better let’s look into the examples one by one. Example Following is the example program we used copyText() method to copy text to clipboard using JavaScript function. Copy text ... Read More
HTML tables allow us to arrange data into rows and columns on the web page. We use the tag, to create table in HTML. A table consist of rows and columns. Table heading, row and column and table data can be set using one or more , , and elements. A table row is defined by the tag. For table rows and columns, we use , tags respectively inside the … tag. Example Following is the example program to create table rows and column. DOCTYPE html> ... Read More
To create table header in HTML, use the … tag. A table header tag is surrounded by the table row …. The tag is surrounded by the tag. A table consist of a rows and columns, which can be set using one or more , , and elements. Use the style attribute to add CSS properties for adding a border to the table. A table row is defined by the tag. To create table header, use the tag. Just keep in mind that you can only have a single heading in a table. Syntax ... Read More
Responsive images will automatically adjust to the size of the screen and to the tab size. To make image responsive first we must add image to the web page using tag, then by using style sheet we can change the parameters of the image to make an image responsive in HTML. Syntax Following is the syntax to make an image responsive in HTML. Example Following is the example program to make an image responsive in HTML. In here, we have used inline style sheet. DOCTYPE html> Responsive Image ... Read More
We use HTML tag defines a hyperlink used to link web pages. The href attribute of the tag, which indicates the link's destination. Which provides us option to specify an email address. To create a link to send mail we use mailto:to specify email address inside href attribute in HTML. Syntax Following is the syntax to link a mail address to the web page. xx@gmail.com Same as the way we link a mobile number. We use mailto instead of tel inside a href attribute. Example Following is the example program to link a mail address to the ... Read More
A bookmark is helpful when you want to remember the web page for future reference. You can access that bookmark at any time to view the web page again. We use HTML links to create bookmarks, so that we can jump to specific parts of a web page. Bookmarks can be useful if a web page is long. When we click on the link, the page will scroll down or up to the location with the bookmark specified on the web page. Syntax First, we should use the id attribute to create a bookmark text… Then, add a link ... Read More
We use the target attribute of the … tag, to change the target value of the link. The target attribute can be used to open any link in a new tab, current tab and so on. _blank − link will open in a new tab. _self − link will open in the current tab. _parent − link will open in a parent frame. _top − link will open in the top frame. Syntax Following is the syntax to change the target of a link in HTML. Link text… Example Following is the example program to change the ... Read More
Tree is a hierarchical data structure which includes nodes and edges to it. Edges in tree acts as links connecting two nodes. The Preorder tree traversal is a technique where the root node will be traversed first and then it will traverse the left subtree followed by the right subtree. It will represent as ROOT → LEFT → RIGHT Algorithm These are the following steps to perform preorder tree traversal − Traverse the root node. Then, traverse the left subtree. Then, traverse the right subtree. To understand the preorder traversal better, consider the following binary search tree ... Read More