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Javascript Articles
Page 167 of 534
How to open a webcam using JavaScript?
In this tutorial, we will learn about the procedure to open a webcam using JavaScript. So, this can be done using WebRTC. WebRTC is a short form of Web Real-Time Communication. Using this object, we can access and capture the Webcam and Microphone devices that are available there in the user device. How to Access Webcam? We can access the user device Webcam and microphone using an ECMAScript object navigator.mediaDevices.getUserMedia(constraints). So, the getUserMedia() function by default seek user permission to use your Webcam. This function returns a promise and once you click ok and give the permission then the promise ...
Read MoreHow to check if the value is primitive or not in JavaScript?
In this tutorial, we are going to know the methods to check if the given data type is primitive or not. Datatypes in JavaScript 1. Primitive 2. Non-primitive Primitive data types − String, number, undefined, boolean, null, symbols, bigint. Non-primitive data types − Object A primitive datatype/value is something that is not an object, and it is represented at the bottom level of the language implementation. All primitive values are immutable which means that you cannot change their type instead you may reassign v new value to the variable. To check if the value is primitive or not, we check ...
Read MoreHow to create an element from a string in JavaScript?
In this tutorial, we will get to know about various methods to create an element from strings in JavaScript. Creating elements from a string can be very useful in case we have to generate elements dynamically which makes the website interactive. An example will be like in a to-do list app we add, delete, and edit to-do items. The createElement() Method We create JavaScript items using the createElement() method. To create a particular element, we pass the item name as a string into the createElement() method. The createElement(tagName) function has a parameter as the name of the tag which will ...
Read MoreHow to create notes taking app using HTML, Bootstrap and JavaScript?
In this tutorial, we will make a notes-taking app using HTML, Bootstrap, and JavaScript. So, the HTML will use here to add different-different elements, bootstrap will be working here to beautify our design like CSS, and JavaScript will be adding basic functionality like adding and deleting our notes. Let’s see our HTML design of the UI. Our UI will contain a simple text area where we will enter our desired note, a button which will use to add our given note to the list of notes and in the list of notes there will be a delete button on each ...
Read MoreHow to create a string by joining the elements of an array in JavaScript?
In this tutorial, we will see how to create a string by joining the elements of an array in JavaScript. We will see two different approaches to doing this task. The first approach is using a simple addition operator (+) to add the elements of the array and separator. The second approach is to use the join() method. Approach 1: Using the Addition Operator (+) In this approach, we will pass two parameters to the function the array of which elements we have to Join, and the second parameter will be the separator that the user has to give, basically, ...
Read MoreHow to compare only date part without comparing time in JavaScript?
While developing the applications, sometimes it needs to compare the only date. For example, you are developing some apps in which users must adhere to the deadline and pay for the subscription. If the user pays at any time on or before the end date of the subscription, the user will be able to use the subscription continues. Otherwise, you need to stop the subscription. In this tutorial, we will learn to compare only the date part without comparing the time in JavaScript. In the above cases, we need to compare the two dates without focusing on the time. Approach ...
Read MoreHow to clear all cookies with JavaScript?
In this tutorial, we will learn to clear all cookies using JavaScript. The cookies are the text or data stored in the format of text files in the browser or user's computer, and it is one kind of cache memory. The developer can store the username, authentication tokens, etc., in the browser's cookies. When a user visits the webpage for the first time, it retrieves the user information from the server and stores it in the cookie format in the browser. After that, when a user visits the webpage again, it retrieves the required data from cookies instead of the ...
Read MoreCan we make print button without JavaScript?
In this tutorial, we will learn to make the print button without using JavaScript. Most of you have seen the print button on any website or application, and when users click on the print button, it prints the whole webpage or any particular file. However, the HTML doesn’t contain the print method. We can use the print() method of the window object. The window object is the global object, which can be accessed anywhere inside the code. So, either user can invoke the window.print() method from the JavaScript or HTML code.Syntax Users can follow the syntax below to invoke JavaScript's ...
Read MoreHow to extract the number of minutes from current time in JavaScript?
We humans can understand how the date and time are divided and printed. On theother hand, JavaScript interprets the date based on a timestamp generated from Unix time, which is a value made up of milliseconds. JavaScript Platform-independent date objects represent a single point in time. A millisecond counter has been included in Date objects since January 1, 1970 UTC. YYYY-MM-DD is the most used JavaScript date format. Timed Dates YYYY-MM-D DTHH:MM:SSZ. A date data type is not available in JavaScript. Dates can be set, obtained, and changed using various methods provided on the Date object in JavaScript. In ...
Read MoreHow to extract the hostname portion of a URL in JavaScript?
In this tutorial, we will see how to extract the hostname portion of a URL in JavaScript. What is a URL? An alternative term for a web address is a URL. For example, tutorialpoints.com is a word-based URL. An IP address can also be used as a URL (ex. 192.168.2.24). Since names are simpler to recall than numbers, most users submit the name’s address when searching on the internet A URL is a method by which web browsers ask web servers for specific pages. The syntax/format of a URL is given below. Syntax scheme://prefix.domain:port/path/filename Parameters scheme − specifies ...
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