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Articles by Shubham Vora
Page 73 of 80
Can 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 ...
Read MoreHow to execute a JavaScript function when I have its name as a string?
Calling a function from a string, stored in a variable can be done in two different ways. The first approach makes use of the window object method, and the second method makes use of the eval() function. This tutorial will guide you to learn the way to execute a JavaScript function using its name as a string. Using the window[]() Method Here, to execute the function using the function name as a string, the string should be changed to a pointer using the following syntax. Syntax var functionName = "string"; functionName = window[functionName]( parameters ); Here we have stored ...
Read MoreHow to encode a URL using JavaScript function?
As we know, a URL is a web address. What is URL encodingand why do we need to encode a URL? The process of turning a string into an accurateURL format is known as URL encoding. A valid URL format only uses "alpha | digit | safe | extra | escape" characters. Only a limited selection of the normal 128 ASCII characters is permitted in URLs. It is required to encrypt reserved characters that are not part of this set. The reliability and security of the URLs are increased with URL encoding. Each character that needs to be URL-encoded is ...
Read MoreHow to do case insensitive string comparison of strings in JavaScript
In this tutorial, we will learn how to do a case-insensitive string comparison of strings in JavaScript. Case in-sensitive simply means the word or string should mean the same even if they are written in lower or upper case. In this kind of case in-sensitive comparison is observed in the google search bar, wherein if the user type “tUtoriAlsPOint” or “Tutorialspoint” the results are the same, similarly it is used in search bar too. There are 4 ways to do this, toUpperCase() toLowerCase() localeCompare() RegExp() Using the toUpperCase() Method When we use the toUpperCase() method on a string, ...
Read MoreHow to determine if JavaScript object is an event?
Let us first understand what is JavaScript objects and JavaScript events. An object in JavaScript is a distinct entity having properties and a type. For an instance, contrast it with a bowl. A bowl is an object with some properties. The properties are design, color, material, weight, etc. Like this, JavaScript object also has some properties. An independent entity known as a JavaScript object can store numerous values as its properties and methods. While a method represents a function, an object property maintains a literal value. Either the object literal or the object function object() { [native code] } syntax ...
Read MoreHow to convert a decimal number to roman using JavaScript?
Roman numerals are a type of number system used to represent a fixed decimal number. Several letters from the Latin alphabet are used for the representation of roman numerals. In this tutorial, the user will learn how to convert a decimal number to roman using JavaScript. Seven symbols represent Roman numerals: I, V, X, L, C, D, and M. The values for symbols are given below. Syntax I is 1 V is 5 X is 10 L is 50 C is 100 D is 500 M is 1000 Using these seven symbols user can convert decimal numbers to roman. ...
Read MoreHow and why does 'z'['toUpperCase']() in JavaScript work?
In this tutorial, we will learn how and why ‘z’[‘toUpperCase’]() works in JavaScript. From the given format, we can say that it calls the toUpperCase() method for the ‘z’ string. It will work the same as the toUpperCase() method, which we invoke by taking any string as a reference. Let’s understand the syntax of the ‘z’[‘toUpperCase’]() below. Syntax let result = 'z'['toUpperCase'](); // returns 'Z', string in upper case The above syntax is same as the below. Example let string = 'z'; let result = string.toUpperCase(); Why does ‘z’[‘toUpperCase’]() work? In JavaScript toUpperCase() method is used to convert ...
Read MoreCan I declare JavaScript variables as specific types?
In this tutorial, we will see if we can declare JavaScript variables as a specific type or not. The JavaScript contains the three reserve keywords to declare the variables: ‘let, ’ ‘var’, and ‘const.’ When the user declares the variable using any keyword, it has a different scope. The variable declared with the const keyword always remains constant, and we can’t change its value after initializing it. The variables declared with the let keyword have block scope and can’t be accessed outside its scope. When we declare the variables with the var keyword, it can have the global scope or ...
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