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We can set cookies for a specific page only using JavaScript. We use the path attribute of the document.cookie property to set the cookie on a specific webpage. Cookies are small text files (4 KB) that store important information such as username, email, session id, and other preferences that help customize the webpage for a particular user. Something so trivial as this is a user preference and thus can be conveniently stored in a corresponding cookie file. The pathname property of the Window location returns a string containing the path of the current webpage. The path is basic information about ... Read More
We use the links property of the document object to show the number of links in a document with JavaScript. The document object, part of the DOM, corresponds to the current web page that the browser has loaded. It Contains all the information about the condition of the browser as well as the web page. The links is a property of the document object that returns a list of all the hyperlinks present in the HTML document. A hyperlink may look something like this − "https://www.tutorialpoints.com/php" The links property of the document object lists all HTML elements having href ... Read More
We use the selectedIndex property in JavaScript to show the index of the selected option in a dropdown list. We use the id of the dropdown list to access the element using JavaScript and then call selectedIndex on it to get the index of the selected option in the dropdown list. Dropdown lists are an important part of user interface utility. It is a list of options from which one or multiple options can be selected by the user. These responses to these dropdown lists are then collected and the required course of action is taken by the user. A ... Read More
We use the URL property of the document object to show the full URL of a document with JavaScript. The document object, part of the DOM, corresponds to the current web page that the browser has loaded. It Contains all the information about the condition of the browser as well as the web page. It can be visualized as a hierarchy that is obtained after rendering the HTML structure of the web page. URL stands for Uniform Resource Locator. It contains the address of a resource on the internet. A Typical URL looks something like this− http://www.example.com/index.html It is ... Read More
We can create many JavaScript variables in a single statement using the var, let, and const keywords that are used for declaring variables in JavaScript. Instead of declaring every variable individually, we can chain many variables together with commas (, ) in a single statement. Since JavaScript is a loosely typed language, variables of many data types can be declared in the same sentence as well. Syntax var variable1 = value1, variable2 = value2, variable3 = value3; Here, var is the keyword used for declaring the variables viz: variable1, variable2, variable3 and assigning them the respective values. Example 1 ... Read More
We use the window.location.hostname property of the document object to show the domain name of the server that loaded the document using JavaScript. The document object, part of the DOM, corresponds to the current web page that the browser has loaded. It Contains all the information about the condition of the browser as well as the web page. Every resource or computer that is available on the internet has an address that is either IPV4 (192.88.99.255) or IPV6 (2001:db8:3333:4444:5555:6666:7777:8888). These addresses are good for computers but not for us. domain name system is a layer of abstraction over that organization ... Read More
We use the lastModified property of the document object to show the date and time the document was last modified with JavaScript. This command will provide the exact date and time of modification. The document object, part of the DOM, renders the whole HTML as a hierarchy of objects and their properties as well as stores different attributes of the webpage. document.lastModified It is a read-only property of the document object that returns a string containing the date and time, the document was last modified. The format looks something this: 07/29/2019 15:19:41 Note − The lastModified property is useful ... Read More
We use the cookie property of the document object to show the name/value pairs of cookies in a document with JavaScript. The document object, part of the DOM, corresponds to the current web page that the browser has loaded. It Contains all the information about the condition of the browser as well as the web page. A server serves requests when a connection is set up and forgets everything about the user as soon as the connection is closed. This posed a nasty problem of bad user experience to the community. A cookie, resolves this problem by storing small but ... Read More
We use the dialog API of jQuery UI to show hyperlinks in JavaScript alerts. JavaScript does not allow putting clickable hyperlinks in the alert box. The closest functionality that plain JavaScript provides is a confirm box using the window.confirm() method. We will be using the jQuery library to show hyperlinks in JavaScript alerts. It is a library for JavaScript to traverse HTML documents as well as manipulate them, create animations, and much more. One such feature is a custom dialog box that we will be using. An alert is a message for the user that requires immediate attention. An alert ... Read More
To access the serial port in Python, use the pyserial module, which Python Serial Port Extension for Win32, OSX, Linux, BSD, Jython, IronPython. Let us see the features - Access to the port settings through Python properties. Support for different byte sizes, stop bits, parity and flow control with RTS/CTS and/or Xon/Xoff. Working with or without receive timeout. The files in this package are 100% pure Python. The port is set up for binary transmission. No NULL byte stripping, CR-LF translation etc. To install pyserial, use pip pip install pyserial At first import the required libraries. import ... Read More