javascript - react input file

1. There is a hidden input type file element in my page. This element can be obtained through the ref attribute and is named this.inputFile. 2. There is a button on the right side of the head of the page. Click the button to trigger the this, fileInput. .click()3 But the result is that the file sele...

我想大声告诉你 2017-07-05 10:44:09 0  1  992

javascript - Error switching between mouse events and keyboard events when utilizing button tags?

I made a small lottery thing, and the start and stop buttons are button labels. When I press start with the mouse and enter the number of people, it is OK to press Enter to pause, but if I press Enter again, it will start and then stop instantly, instead of pressing Enter again to end. If the button...

習慣沉默 2017-05-18 10:54:36 0  3  587

javascript - How to implement JS to dynamically modify css global styles

If you want to dynamically modify the css global style in the page, for example, change the color of all fonts on the page to red, you can achieve this through css {code...} And if you use js, use the buttons in the page to modify the styles of all elements, that is, click through js The button dyna...

阿神 2017-05-19 10:11:38 0  3  649

HTML: How to go to next page in ascending order?

I have some HTML files with numeric names in a folder called Project like this: 230512.html230519.html230530.html230630.html240120.html I want to add a "Next Page Button" to each file. When I click the button, the hyperlink takes me to the next page in ascending order. So if I'm in 230530....

P粉256487077 2023-09-10 21:41:36 0  1  693

How to center align a toggle button on a div element?

I want to center align the toggle button on my element "Client_name". I created another div but I can't get the button to go down and position it further to the right. Do you have any ideas? The jsfiddle link is below https://jsfiddle.net/6cyuwxvf/.switch{position:relative;display:inline-b...

P粉894008490 2024-03-27 21:47:43 0  1  401

python - url_for in flask template all point to 404 page?

The links using url_for in the template all point to the 404 page, for example: {code...} Clicking the logout button will go to the 404 page. But if I use 127.0.0.1:5000/logout, I can log out. The results of url_for in the template file are None, so when you click any link, the URL will change...

漂亮男人 2017-05-18 10:46:08 0  1  590

php - The form is submitted to action. The user input is illegal and a prompt is required. How to deal with it?

{Code...} Verify.php determines whether the input is illegal. If it is illegal, how can the user be prompted? ps: It's OK if you use jquery to bind the button. But I want to know if the submission method like form/action can output the judgment result to the front desk?

漂亮男人 2017-05-24 11:34:13 0  1  477

How can I trigger a click event when I click a button displayed outside the dialog element?

I'm using a native HTML dialog element as a modal in my Vue3 application, and I've successfully displayed a button to the side/outside of the modal by using absolute positioning. However, due to the nature of the dialog elements and the way they are placed on the top level, I cannot fire the click e...

P粉116654495 2023-08-31 23:33:50 0  1  600

Execute PHP script on button click without refreshing page

I'm having trouble using PHP and JavaScript. Goal: When the event listener of the HTML button in the .js file is called, the .php script should be executed without reloading the page. Expected result: When the button is clicked, the PHP script will be executed. In my case, the file from the URL will...

P粉805107717 2024-02-17 12:27:38 0  2  396

Why is there no response when running the example in the introductory tutorial of PHP Chinese website?

In the PHP complete self-study manual tutorial of the introductory tutorial on the PHP Chinese website, a dialog box will pop up after clicking the run instance. Click the submit button. Why is there no response and no code running results are displayed?

阿刚 2021-01-08 19:44:12 0  1  1070

Image to text OCR web image URL upload

Referring to the working codepen demo here, the application works fine if I click the select file button to upload an image from my local machine and extract the text in the image. But how do I upload a web image URL like this instead of a local computer file and output the OCR text result with the ...

P粉316890884 2024-03-29 21:37:25 0  1  440

Title: JavaScript to remove latest child element by ID has limited effect

I'm making a dynamic list where the user can click a button to remove an input. When a new input is created, I assign an ID to the child element using a counter that is incremented by 1 each time a new input is generated. However, when I try to delete an input by ID, it seems that only the most rece...

P粉914731066 2024-01-16 18:06:37 0  2  501

Move Woocommerce clear variation link to add to cart button

I have removed the "clear" link from the theme's php file so that the clear option does not show up when a product variant is selected. The link is now gone, which was part of the goal, but the Clear link still has an effect on the Add to Cart button, moving it down about 30 pixels once a ...

P粉018653751 2024-02-21 15:13:11 0  1  493

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  590

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  864

java - How does Oracle obtain the next piece of data in a deduplication result set?

This is the query result in the oracle database: {Code...} I can now get a list of examination numbers: Each student number is a hyperlink, connected to the detailed information of this student number; Now how to enter the detailed content How to jump to the next student number page by clicking a bu...

为情所困 2017-05-17 10:04:31 0  4  550

The record in the database is deleted, but the delete button remains on the front-end interface

When the delete button is clicked, it successfully deletes the record from the database. However, it is not deleted immediately on the front-end page. The deletion result will not be displayed until the page is reloaded or refreshed. My view: @foreach(variteminModel){<ahref="#"class=&qu...

P粉118698740 2023-08-29 17:04:46 0  2  604

Moodle form cannot be verified after submission

I'm trying to create a form whose structure depends on parameters in the URL. If no parameters are specified in the URL, an error message should be displayed. Based on the id, perform a database query and populate the form data. Example URL: http://127.0.0.1/local/group/signin.php?groupid=14 Unfortu...

P粉287726308 2023-08-28 21:01:24 0  1  559

javascript - JS query whether the first 8 or first 6 digits of a set of 10 digits match

I want to implement a function that when the user clicks the query button after entering a 10-digit number, it will match the pre-input value in the json data and feed back different query results based on different information. However, the pre-input value of json is only 8 or 6 digits (correspondi...

phpcn_u1582 2017-05-19 10:45:33 0  3  589

redis - 一个异步队列处理与用户交互体验的问题

我在一个抢购页面，点了“抢购”按钮请求到后端，后端会把此操作放入队列中，然后进行排队处理，但是此时对于前端用户来说，我怎么给他一个交待呢，他还在那个页面等结果呢，而队列不知道什么时候才处理到他的请求。

为情所困 2017-04-28 09:04:25 0  2  694