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How to send TAB key in JavaScript? [SOLVED]

In web development, the tab key is used to indent code, but what if you want to send the tab key itself? In this article, we’ll show you how to send the tab key in JavaScript. We will show you how to detect and make use of the tab key presses in JavaScript and connect event listeners to the tab event.

Attach Event to the tab key in JavaScript

Aside from the typical behaviors and operations that are done with the tab keys such as moving through hyperlinks, webpage sections, and text boxes, we can attach custom events to the tab key. For us to attach an event listener to the tab key, we need to properly reference the tab key. To do this, we need the keyCode for the tab key which is the number 9 . With that, we will compare the keyCode value we receive to the value 9 , and perform the actions that we want.

Let’s log the links that the tab key is presently on, we will add an event listener with the keyup event and function listLinks . The listLinks function will check if the keyCode is equal to 9 , access the ativeElement and console.log the href attribute.

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Output (within the console)

Summary

We can make use of the keys on the keyboard to perform actions other than their default operations. As long as you know their keyCode value, we can make use of them with JavaScript event listeners. Inherently, we can make use of the tab key (with a keyCode value of 9 ) to perform event-based operations.

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  Источник

  Detect tab changes in the browser: JavaScript Blur & Focus

  

  By detecting the tab change in the browser you can conjure up some cool functions. And you can find out how to do this here!

  There are some features where it can be useful to be able to see the tab change of a visitor. These include limiting background activity and playing an animation on your website.

  A nice feature that you can build by detecting the tab change is also this one:

  The page title can be changed as desired and can display funny or helpful information. A little gimmick that can provide that special something and can also lead to some people being surprised.

  Besides a fun effect, changing the page title can also attract the user’s attention to your page (again). If the user is inclined to leave the page, he can be “pulled” back to your page with a funny, nice or helpful hint.

  I’ll also show you how to build the well-known WordPress preview feature yourself, so that the browser automatically switches tabs.

  Reduce background activities

  If you perform complex calculations with JavaScript, this will put a strain on your visitors’ browsers. But since we know when a visitor is on the tab of our website and when not, we can pause the calculations in the corresponding time period, as long as this does not affect the expected result.

  By limiting these background activities, especially users with weaker computers or smartphones can be relieved.

  There is (almost) always potential for optimization: With these Code Snippets for WordPress you can still tune your page properly!

  Another field of application is the playing of an animation. If your visitor (luckily for you) returns to your site, you could greet him with a great animation. Of course, you should keep everything within limits so that it doesn’t get out of hand.

  For serious sites this might be less appropriate… but if you want to prove your skills or it just fits to the theme of the site, why not!

  Detect tab changes with JavaScript

  To detect the tab change we use pure JavaScript without jQuery etc. Everything you need is hidden in this code.

  

  If you want to switch from jQuery to pure JavaScript, this offers some advantages and you can still use all the great features. 🙂

  We register the blur event on the global document variable. Generally, the blur and focus events are often used in conjunction.

  The blur event is triggered when an element or the entire tab (document) loses focus, i.e. when we no longer access it. In contrast, the focus event is triggered when an element or the tab (document) is refocused, i.e. in our case it is back on the tab.

  // user leaves the tab document.addEventListener('blur', (e) => < // your custom code here >); // user enters the tab (again) document.addEventListener('focus', (e) => < // your custom code here >);

  If you use jQuery you can use the same code, normal JavaScript works there too of course.

  More about blur and focus can be found in the MDN web docs.

  By the way: The demo shown at the beginning can be easily implemented with this code:

  let siteTitle = ''; window.addEventListener('blur', () => < siteTitle = document.title; document.title = 'Come back! :c'; >); window.addEventListener('focus', () => < document.title = siteTitle; >);

  Automatic tab switching like in the WordPress preview

  When you use the backend preview on WordPress it opens in a new tab. If you click again and the tab is still open, the browser switches back to this tab and reloads the URL. Here you can try it yourself:

  The function can be implemented via two simple lines of code:

  // the URL to open in the new tab let url = previewInput.value; // open tab or switch to tab if already exists let previewTab = (window.previewTab && window.previewTab.close()) || window.open(url, "previewTab");

  I have chosen the name previewTab freely. If you want to use another one, you can replace all occurrences of it in the code (4x).

  This function has nothing to do with the blur & focus event, but I find this function so cool and simple and wanted to show it! 🙂

  What did you think of this post?

  Источник

  Detect When Users Switch Tabs using JavaScript

  In this article, I’ll show you how to find out when users change tabs in browsers using JavaScript. It’s going to be fun, it’s helpful to see how often the user loses his attention. You can even use it to add the data to the database (it is out of the scope of this article). There are two ways I know how to solve this problem. So, I’ll be showing you both of them.

  Method — 1

  In this method, we will use two event listeners focus (when the user focuses on your website or window) and blur (when the user loses focus) We don’t need HTML actually, because when users are on another tab so they won’t see your website page. Only JavaScript will do:

  // when the user loses focus window.addEventListener("blur", () =>  document.title = "Breakup"; >); // when the user's focus is back to your tab (website) again window.addEventListener("focus", () =>  document.title = "Patch Up"; >); 

  Method — 2

  In this method, we only need one event listener (visibilitychange). It has a property called visibilityState which we can use to detect the window switching state.

  document.addEventListener("visibilitychange", () =>  // it could be either hidden or visible document.title = document.visibilityState; >); 

  You can use these to add many functionality to your website such as stop music or video when the user loses focus:

  document.addEventListener("visibilitychange", () =>  if (document.visibilityState === 'visible')  music.play(); > else  music.pause(); > >); 

  Wrapping up:

  That’s all you need to detect when users switch tabs. Both methods work as expected. You can use any of them. If you enjoyed this article, then don’t forget to give ❤️ and if you have any questions or feedback then don’t hesitate to drop them in the comments below. I’ll see in the next one.

  Источник

  Tab key press event in JavaScript | Example code

  Use the key event and Check if the key pressed is Tab (code = 9) to detect the Tab key press event in JavaScript.

  Example handle the Tab keypress event in JavaScript

  

  Q: How to call a function when pressing the tab key in JavaScript?

  Answer: Add an event listener to the document and match the keycode with the tab keycode. If the condition is true then call function.

      document.addEventListener('keydown', function(event) < if (event.which === 9) < hello(); >>); function hello() 

  If you want to pass the field to the function, you could also add the event listener to the input itself. Then access it with event.target

  Do comment if you have any doubts or suggestions on this JS event topic.

  Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.

  OS: Windows 10

  Code: HTML 5 Version

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