When tab switching occurs, the alert box fails to be processed by the browser

When using the alert(message) function, it will display an alert box with a message and an OK button. It will also pause the execution of any code that follows until the OK button is clicked. However, I have noticed a peculiar situation where switching tabs from one page to another and then back again causes the code after the alert to execute while the alert box remains visible. Is this behavior intentional or a bug?

I have tested this in Firefox and IE without encountering the issue, but both Chrome and Edge exhibit the same behavior. Interestingly, the presence of developer tools can affect the outcome as well.

An example scenario:

After clicking on button1 to trigger the alert box, if you switch to another tab and return, the value of button2 changes to "123" while the alert box persists.

<html>
   <head>
      <script type = "text/javascript">
            function fun() {
               alert (" Hello World \n This is an alert dialog box ");
               document.getElementById("test").setAttribute("value", 123);
            }
            function fun2() {
               document.getElementById("test").setAttribute("value", "Test");
            }
      </script>
   </head>

   <body>
      <p> Click the following button to see the effect </p>
      <form>
         <input type = "button" name="button1" value = "Click me" onclick = "fun();" />
         <input type = "button" name="button2" id="test" value = "Test" onclick = "fun2()" />
      </form>
   </body>
</html>

Answer №1

It is intentional to prevent the script execution from being blocked. Take a look at this design document for further information:

When the user switches to a different tab, moving it into the background and making it inactive, the dialog will be dismissed.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Declare the push method within the Countly.q array in a TypeScript declaration file

Is there a way to declare Countly push add_event method in the following manner? Countly.q.push(['add_event',{ "key":"action_open_web", }]); I attempted to do this inside a declaration file (.d.ts) but it did not work. Here ...

Is it possible to adjust the width of the comment box on the Facebook "Like" button?

Is there a way to set the width of the comment box that appears after clicking the Facebook "Like" button? I know how to adjust the width of the button itself and related content, but can't find any options for the comment box: I've tried overri ...

What is the best way to achieve a horizontally compact layout in Bootstrap by centering the content?

I am looking to center my content on the page and maintain a close proximity between items within a div. However, with Bootstrap 5, when I resize the page wider, additional space is added which pushes the items apart. Is there a way to keep them compacted ...

Modifying the file name during the download process using AngularJS

Looking for a solution to download a file from an ajax GET request in angularjs? Currently, I am using an invisible iframe to trigger the "Save as" popup for the downloaded file. However, I need to change the name of the file before the popup appears. If ...

The ForbiddenError has struck again, this time wreaking havoc in the realms of Node.js, Express.js

I am currently adapting this GitHub sample application to utilize Express instead of KOA. However, I am encountering an Access Denied issue when the / route in Express attempts to load the index.html. What specific modifications are required in the code be ...

Encountering an HTTP parsing failure while sending XML through Angular 5's HttpClient

Struggling to access a local webservice through XML: Take a look at the code below: const httpOptions = { headers: new HttpHeaders({ 'Content-Type': 'text/xml', 'Accept': 'text/xml', 'Response- ...

JavaScript - Delayed Text Appearance with Smooth Start

I want to create a landing page where the text appears with a slight delay - first, the first line should be displayed followed by the second line. Both lines should have an easing effect as they appear. Below is a screenshot of the section: https://i.sst ...

Configuring Node.js HTTPS to function alongside HAPROXY

My goal is to establish communication between my nodejs app and HAPROXY using HTTPS. The plan is for nodejs to send a message to haproxy via https, and haproxy will then route the message accordingly. Initially, I had success with the request.js library, ...

Styling Input elements with a unified border in Bootstrap

[Issue Resolved] I have been working on setting a single border between multiple inputs inside a form-group in Bootstrap. Currently, the border is only visible when the input is not focused and it is the last one. However, my expectation is for the bo ...

Tips for displaying a Bootstrap 5 popover triggered by a select option change event

I'm using a select box with 4 options, and I have set it up so that when the user clicks on one of the options, a Bootstrap 5 popover is triggered dynamically upon the change event. Fiddle: https://jsfiddle.net/mayursutariya93/qjeg5r9b/6/ Here' ...

NPM: Handling multiple prehooks with the same name

Is it possible to have multiple prehooks with the same name in my package.json file? For example, having two instances of pretest: "scripts": { "start": "react-scripts start", ... "pretest": "eslin ...

What are the strategies for distinguishing between languages in React Native prior to mounting the component?

I had high hopes for this solution, but unfortunately it doesn't work as expected. The issue is that this.text.pupil is undefined. Could the problem possibly be related to componentWillMount? If so, how can I handle multiple languages outside of ...

Is there a way to make a React Component to update and navigate to a specific position using react-sound

Currently, I am in the process of constructing an audio player utilizing react-sound. One feature I aim to incorporate is the ability to return to a specific position within the audio track. At the moment, this is my approach: goToVeryCustomPosition() { ...

How does the question mark symbol (?) behave when utilizing it in response? Specifically in relation to data, the API, and the fetch API

Have you encountered the curious sequence of symbols in this context? data?.name Could you explain the significance of the question mark (?) between 'data' and the period? ...

Concealing table columns using JavaScript - adapt layout on the fly

I am currently implementing a responsive design feature on my website, where I need to hide certain columns of a table when the viewport size decreases beyond a specific point. Initially, I tried using .style.visibility = "collapse" for all <tr> elem ...

How can I simulate the response of a VueX action using Vue-test-utils?

I am currently developing a test for a Vue component that interacts with a module store to execute an action and utilize the result from it. Since the action involves making requests to our API, I prefer not to run the test using the actual action. Instea ...

Adding elements to an array in Node.js

In my 'both' object, I need to store 2 arrays: eng and fr. Each of these arrays contains multiple objects. How can I transfer all values from frDisplayData to fr:[] within the 'both' object: const displayData = []; var both = {eng:dis ...

Styling on Material UI Button disappears upon refreshing the page

I've been using the useStyles function to style my login page, and everything looks great except for one issue. After refreshing the page, all styles remain intact except for the button element, which loses its styling. Login.js: import { useEffect, ...

Leveraging jQuery for Adding Text to a Span While Hovering and Animating it to Slide from Left to

<p class="site-description">Eating cookies is <span class="description-addition"></span>a delight</p> <script> var phrases = new Array('a sweet experience', 'so delicious', 'the best treat', ...

AngularJS Data Binding Issue - Watch cycle fails to trigger

View the JSFiddle example here: https://jsfiddle.net/pmgq00fm/1/ I am trying to achieve real-time updating of my NVD3 chart by utilizing the setInterval() function on line 39, which updates the data bound to the directive. Here is a brief overview of the ...