javascript - Monitor if user closes browser offline

I am working on a web system that needs to verify whether it is online. For the online situation, I added an online field in the user table. 1 means online and 0 means offline. There is an exit button in the website. When the button is clicked to exit normally, the online field of the user table is ...

PHPz 2017-06-05 11:09:36 0  3  801

How to create buttons in HTML and JavaScript to redirect pages to different pages

I'm creating a website using VScode and I want to create a button that when clicked will redirect to another page on the website. I want clicking the "MENU" button to jump to a new page. I've created a new file for the page I want to redirect, just not sure how to get "MENU" to a...

P粉523625080 2023-08-10 12:14:18 0  1  508

javascript - iframe in h5 page cannot invoke iOS application?

In a web page opened in Safari on iOS, when a button on the page is clicked, if the user has a specific application A installed, application A will be opened, otherwise it will jump to the download page of application A in the AppStore, as shown in the online search results Is to use ifame, when the...

扔个三星炸死你 2017-06-17 09:16:17 0  1  887

PHP page, after clicking submit, the page pointed to by the action cannot be opened. What's going on?

Environment: PHPStorm 2018.1+Wampserver 3.1 There is no problem opening a single page, but after clicking the submit button, it says "The page cannot be found." In the window where the web page cannot be found, you can refresh the web page directly and you can access it again. index.php： ...

SkyRabbit 2018-06-13 17:07:09 0  2  1120

Use useState to set the value entered in the form

I'm trying to use useState to set the value of an input, but it's not working the way I want it to. So I used Formik to create a weekly schedule for an appointment system. I have a radio button for free appointments. When selected, I get the time data for the appointment. But I didn't get this day. ...

P粉588660399 2023-09-04 23:16:30 0  1  651

Click on an element within an iframe on the page

I would like to ask, regarding a page with an iframe nested in another website, in the parent page, how to use js to trigger the button click event of the sub-page. Can any expert provide a sample code? Beg on your knees! ! !

Roy 2020-06-23 19:58:44 0  0  1034

button missing

So today I should make a calculator, a web calculator with JS on it, CSS and so on. I recently rewrote all JScries and rechecked some things. Now the calculator button is gone. I wish the website had a calculator on the page that it used to have buttons for. Weirdly aligned, but still a button. But ...

P粉521013123 2024-01-16 21:32:51 0  1  489

Why when vertically aligning a button element in a div, the element has more vertical space than defined by CSS margins?

I have a work in progress page on this site and I thought the hardest part of this page would be the script and styling for filtering the results, but actually the filtering part works as expected, it's just a styling/alignment issue that confuses me I'm running into To the part in question is the m...

P粉080643975 2023-09-14 18:49:41 0  2  605

How to remove gray "border" on HTML buttons

I see a border around a button on an HTML web page. I'm trying to make one button blue and one green and place them on a table. The code is as follows: <tablealign="center"><trstyle="font-family:verdana;font-size:24px;"><th>SelectyourRegion</th></tr&...

P粉986028039 2024-03-30 10:30:48 0  1  584

Each time the page loads, select the li list of default matching names

I've created a list of color buttons on a product detail page on my e-commerce web page. When I enter the page I want the matching color li button to be selected by default. A specific color name (text string) is available on each product page. Below is a summary of my code. .color-wrap{}.color-wrap...

P粉155128211 2023-08-13 17:51:12 0  1  559

Open page on specific tab using URL hash

Admittedly, I'm a little lost on this since I'm very new to hashes, but I think this might be a solution to my problem, so I'm hoping someone here might have some more insight. I have a webpage with multiple "tabs" (a div that hides information until the button is clicked, and a div that h...

P粉317679342 2023-09-04 14:33:50 0  1  606

Does Next.js support conditional rendering and pre-rendering of unrendered HTML?

Does Next.js pre-render HTML on a page that only displays when a certain button is clicked? For example, when we have tabs, does it render the content of the tab that is not yet shown?

P粉450744515 2023-08-14 17:48:55 0  1  582

PHP implements links and background image settings between pages

I need help linking two web pages together in php, I want my users to click a button and jump to the next page? Is there any relevant code that can achieve this function? Also, how can I add a background image to my entire php website?

P粉009828788 2023-09-14 22:34:32 0  1  576

Access a webpage's `window`/DOM/HTML from an extension

I'm writing a Chrome extension and trying to overlay the current webpage as soon as a button is clicked in a popup.html file. When I access the document.body.insertBefore method from popup.html, it overwrites the popup, not the current webpage. Do I have to use messaging between background.html and ...

P粉046878197 2023-10-18 09:44:00 0  2  675

Encountered a problem using Nginx reverse proxy Office Web App

Microsoft's Office Web App can preview office documents directly online. The effect is like http://www.labnol.org/internet/google-docs-viewer-alternative/26591/ I need to embed the page in the form of iframe in my website, and can operate the iframe...

伊谢尔伦 2017-05-16 17:24:56 0  1  1864

javascript - How to locate which js file the http request is in

I am looking at a web page now. When I click a submit button, a post request will definitely be triggered. I want to know now which js file the js statement of this post request is in. I want to take a look and learn. But there are too many source files for a web page. How should I locate this code?

仅有的幸福 2017-05-19 10:24:06 0  3  1150

Using the Vue.js 3 Composition API, trigger an event when the component is displayed

I have some components in my application that are shown/hidden via buttons and variables like v-show="variable" and the buttons just set these variables to true/false and I process these components as web pages like Just like browsing the website on different pages. What I want is a way to...

P粉032900484 2023-08-28 23:40:07 0  1  587

javascript - Display and hide issues of comment reply box

I have been replying to article comments recently, and the table structure is clear. However, when making the front page, I am not sure whether the reply box is generated in advance based on the template, or when the user clicks the reply button, the js is dynamically added below the current comment...

PHP中文网 2017-05-19 10:14:58 0  2  777

Troubleshooting: Initial login and website loading issues

I have a problem using VueApollo and Vuex in my Vue application, so when I log into the website for the first time, the webpage is empty i.e. does not contain events and authentication, but when I refresh the website using the refresh button in the browser , all events are loaded, even across the ne...

P粉891237912 2023-08-03 21:02:37 0  1  574

Vanilla JS setTimeout(): Identifying wrong behavior

I have an animation on my hamburger menu written in HTML, CSS and vanilla JavaScript. Expected results When you click the hamburger menu button, the following events should happen: When you click the hamburger menu icon: main rotates 180° and shrinks along the height at 2000ms After 2000ms passes, t...

P粉797855790 2024-04-02 20:44:40 0  1  486