Can't set a value in a web form using "value='foo'", but entering the value manually is OK?

I tried setting the value of several fields in a web form using something like document.getElementsByName('form[493202]')[0].value="Foo" If I do this in the browser console the field will be Updated, but if I then manually click on the field it reverts to the old value. The old values ​​we...

P粉863295057 2023-09-13 15:56:10 0  1  515

Can anyone please help me write down how to use alert() to print out the effect of 0 1 2 3?

function sss(){ var s=0, for (var i=0;i<3;i++) { s++ } alert(s); } Can anyone please help me write down how to use alert() to print out the effect of 0 1 2 3?

奇遇 2018-12-21 11:16:17 0  1  1141

javascript - Binding a change event to the input file will be effective in the first execution, but will have no effect in subsequent executions.

Binding a change event to the input file will be effective in the first execution, but will have no effect in subsequent executions.

大家讲道理 2017-05-19 10:41:38 0  2  701

javascript - Using thinkphp3.2.3, the textarea has been manually entered and the line feed is entered, but after submission, the database does not have any line feed tags. How to solve it?

Using thinkphp3.2.3, the textarea has been manually entered and line-wrapped, but after submission, the database does not have any line-break tags. How to solve it?

PHP中文网 2017-05-16 13:15:21 0  3  673

javascript - js (Vue) practice: How to input @, and then a list of related candidates will automatically appear?

The effect is as follows: Effect description: 1. The user enters the @ symbol, an option list appears, and the option list is automatically positioned behind the @ symbol. (The current idea is: dynamically monitor the input character if it is @, and the list box appears at the cursor hovering positi...

PHP中文网 2017-07-05 11:03:32 0  3  3632

How to move the page up in iOS Safari to accommodate the pop-up keyboard

How do I move the page up when the keyboard is shown on Safari on iPhone? Currently the keyboard covers the input box when someone focuses on it. I want the keyboard to be below the input box. Can anyone please help? How to cancel this effect when the input box loses focus?

P粉715228019 2023-08-09 17:01:31 0  1  678

node.js - Based on dvajs, how can I get the current environment in the code?

How can I get the current environment in the code? For example, when I am developing, I hope to simulate the results of user input... For example, the results of scanning a QR code... I read several webpack configuration files and it said that node_env can be obtained. But no matter how I configure ...

天蓬老师 2017-05-16 13:39:23 0  1  460

nginx - related issues about domain name jump

Question 1: If I have a domain name abc.com, now I want to automatically jump to about.abc.com when I enter abc.com in the browser, just like the gitlab official website. What steps are needed to achieve this effect? What knowledge is required? Question 2: If I now have a domain name abc.com...

某草草 2017-05-16 17:11:08 0  4  528

javascript - How to assign remote files to input files?

How do I get the file URL for {code...} through ajax and assign a value to the files attribute of the input? It has the same effect as clicking the input to select a local file. How to do it?

phpcn_u1582 2017-05-16 13:23:13 0  1  530

How vim adopts different key mappings for different languages

I want to map braces to input left braces to have this effect {code...} I can achieve the effect by modifying the .vimrc in the home directory. The problem is that this setting is valid for all files. In C++, I I want to have such an effect, but I don’t want to have such an effect in other languages...

伊谢尔伦 2017-07-03 11:42:28 0  1  1212

If Promise object rejects itself - Stack Overflow

Code: {Code...} Firefox only outputs reject, and Chrome inputs normally, and then Uncaught (in promise) will appear. Why does an uncaught exception occur? The catch of p is clearly defined, and why does Firefox only output The operations of outputting reject and outputting p have no effect (actually...

女神的闺蜜爱上我 2017-06-14 10:53:56 0  2  743

Problem react-zxing switching problem: camera cannot be turned off

I'm using react-zxing to scan barcodes on a web page. I have two options for scanning the barcode, using the zxing library to scan the barcode and entering the barcode manually. Problem: If I switch to "Manual Input Mode" and then switch back to "Scan Mode", the scan view disappe...

P粉465675962 2024-03-21 22:57:34 0  1  440

javascript - Problems with model data binding in vue.js

In the following code, why does the el element in js have to be bound to the id cc of the div to achieve the effect of instant input? On the contrary, if it is directly bound to the id of the input, it cannot be achieved? After all, the message of the model is applied to the input {code...}

大家讲道理 2017-05-19 10:22:05 0  3  575

FTP account password autofill?

If there are many ftp account passwords. It's troublesome to enter it manually every time. How can I develop a function where I can only see the server IP on the page, and when I click on the link, it will automatically start the ftp and automatically fill in the account and password? Is there any c...

phpcn_u63319 2017-11-21 10:16:06 0  3  1313

javascript - Ask the Vue.js master for advice. Regarding the string data of sub-component props, it will not change with the changes of the parent component under data.

As shown in the official code below, if the parent component changes the value in the input, the text of the span tag of the child component will change. {Code...} Browser effect Next, I added the data attribute to the child component, and changed the field bound in the &lt;span&gt; tag to {...

習慣沉默 2017-05-19 10:28:49 0  3  694

python - website access frequency limit for accounts

When crawling a certain website, the access frequency of the account is limited. If you switch accounts, you must manually enter the mobile phone dynamic verification code. Are there any other solutions?

欧阳克 2017-06-28 09:25:06 0  3  899

javascript - JS event bubbling problem

Case closed: Use CSS to achieve this effect. Thanks for your help, I switched to using CSS to realize this effect. 1. In the following code, I listened to the mouseover and mouseout events of the a tag to trigger the canvas animation, and prevented the event from bubbling in the callbacks of mouseov...

学习ing 2017-06-12 09:32:56 0  3  814

Problems with indentation of curly braces in vim

Now suppose you write an if statement. After typing the left brace and pressing Enter, it looks like this (automatic completion is set) if(a &lt; b) { } The effect I want is if ( after pressing Enter a &lt; b) { I//The cursor is here} Please tell me how to set up vimrc like this? Thanks!

仅有的幸福 2017-05-16 16:39:40 0  2  676

How to bind a shortcut command in vim to open two plug-ins at the same time

For example, I use two very popular plug-ins, NERDTree and Tagbar, in vim. Generally, I open these two plug-ins at the same time after opening the editor. It is very troublesome to type twice every time. I wonder if I can use them To synthesize a command, such as dev, to achieve the following effect...

高洛峰 2017-05-16 16:42:58 0  2  636

After opening NERDTree and entering vim, how can the cursor be placed in the file editing area on the right by default?

After configuring NERDTree to be automatically enabled by default in .vimrc, every time you enter vim, the cursor is in the NERDTree on the left, and you have to manually press ctrl+w+w to go to the editing area on the right, which is very troublesome. I searched online for a while but couldn't find...

天蓬老师 2017-05-16 16:41:30 0  1  790