Web development blog

Friends, have you ever compared a sandwich and an airplane? For some reason many people think that JavaScript and C++ cannot be contrasted because of their different fields of application. With the advent of products such as NW.js or Electron, this problem is slowly changing its direction. Myth one. The use of One way or…

When designing sites it is often necessary to switch states in some way, usually pseudo-links are used for this: hide or show a tooltip, an input field, another part of the page. It is possible to write JavaScript code and styles for it every time, but over time this leads to code bloat, which we…

It’s common knowledge that STEM and web programming skills have been rising in popularity during the past 10 years. Needless to say, there’s no indication that this trend will change in 2019, or even in the following decade. In fact, the Bureau of Labor Statistics anticipates continued growth for software engineers at 22% from 2012-2022….

Definition and application The JavaScript method removeEventListener() of the EventTarget object allows you to remove an event handler of a specific type for a specific target that was set using the addEventListener() method. The event handler to be removed is identified through a combination of the event type, the specified event listener function, and various…

Not so long ago we were developing a clock using javascript. Today we want to take it a step further and tell you how to implement the alarm clock feature in our clock using the HTML5 tag audio. We’ll need to add the following functionality: provide the ability to set and edit the alarm clock,…

My more or less serious way in programming started with writing programs in C#, sometimes I tried to write in JavaScript, and now and then I got stumped in such situations, when I had incorrectly specified variable name and found out about it many years later after many hours of debugging, because I did not…

Study, practice, then rest. If you’re intent on mastering the fundamentals of JavaScript,as opposed to just getting a feel for the language, work with this book and the online exercises in a 15-to-30-minute session, then take a break. Study a chapter for 5 to 10 minutes. Immediately go online at http://www.ASmarterWayToLearn.com/js and code for 10…

How do I swap two elements in an array in JavaScript? Suppose we have an array that contains 5 letters. We want to swap the element with index 4 (in this case “d”) with the element with index 3 (in this case “e”). We can use a temporary itemtmp to keep the value of #…

Problem This may seem like a recurring question, but none of the solutions seem to work for me. I have gem jquery-railsin my Gemfile. Also the lines And this is my Gemfile: My application.html.erb: I can’t start my Rails application. I do not understand what the problem is. My ruby ​​version is 2.1.6 Please help. Solutions 1 I ‘m following couldn’t find file…

Definition and application The JavaScript baseURI property of the Node object returns a string ( DOMString ) representing the absolute base URL of the node. The property is read-only. Please note that the value of the property may be null , in the event that it is not possible to obtain an absolute URL ,…

I have some JavaScript code that works in FireFox, but not in Chrome or IE. In Chrome JS console I get the following error: Msgstr “Uncaught SyntaxError: Unexpected end of input”. The JavaScript code I’m using: This indicates an error in the last line, which is }); Solution Add a second });. With the correct…

A date is given and the task is to subtract days from the date. To subtract days from a date in JavaScript, you use some of the methods described below: JavaScript getDate () Method: This method returns the day of the month (from 1 to 31) for a specific date. Syntax: Returned value: returns a…

Hi! For example, you need to know if a function exists in order to execute it.To check for the existence of a js function, you can do so in a simple way: It’s all very simple. That’s how you check if a JavaScript function exists.

In JavaScript, almost everything is an object. Objects are used to store information in key-value pairs, where the value can be any other data type or function. Unlike arrays and strings, objects do not have a predefined property that returns their length. Therefore, if you try to get the value of an object’s length property,…