forms

问题 I have an HTML input range set up with a bunch of CSS changes to the appearance, and I was wondering if there was any way to make it smoothly change from wherever it is to where the user changes? input[type=range] { -webkit-appearance: none; width: 100%; height: 20px; border-radius: 5px; border: 1px solid; background: none; box-shadow: 0px 0px 8px 0px #555, 0px 0px 25px 0px #555 inset; transition: 0.4s all ease-out; outline: none; } input[type=range]::-webkit-slider-thumb { -webkit-appearance

问题 I have an HTML input range set up with a bunch of CSS changes to the appearance, and I was wondering if there was any way to make it smoothly change from wherever it is to where the user changes? input[type=range] { -webkit-appearance: none; width: 100%; height: 20px; border-radius: 5px; border: 1px solid; background: none; box-shadow: 0px 0px 8px 0px #555, 0px 0px 25px 0px #555 inset; transition: 0.4s all ease-out; outline: none; } input[type=range]::-webkit-slider-thumb { -webkit-appearance

问题 TLDR: Which input type can utilize the mobile numeric keyboards AND implement masking with spaces injected and a max limit for CVV and Credit Card inputs, such as: XXXX XXXX XXXX XXXX When building forms, I have seen a varied degree of consistency surrounding the correct input type for credit cards. Here are my discovered pros and cons for each: type=text Able to mask easily with various libraries such as cleave.js or set maxLength attribute Mobile users do not receive numeric-only keyboard,

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 7 years ago . I have a pictureBox in a Form. In the middle of that pictureBox, I've placed the name of a chosen photo. Now, I want to color the background of that chosen name. How can I do that? 回答1: I'm not sure what you mean

问题 I have the following code for a simple calculator. The code works fine, but I want the value in the dropdown list to stay there after submitted. How would I do this? Essentially, I want the operator to stay selected once the calculation has been done. At the moment, it just shows a '+', even if the sum is 25 / 5. <?php $number1 = $_POST['number1']; $number2 = $_POST['number2']; $operation = $_POST['operator']; Switch ($operation) { case 'add': $answer = $number1 + $number2; break; case 'minus

问题 I've read through some related articles without any luck of solving my own issue of getting form fields to appear as required. Perhaps the problem lies outside but I wanted to share in case it highlights a unique case. This is a class assignment viewable in entirety here, it allows the user to add new trains to a schedule and update a Firebase DB. For this I used Bootstrap for the styles and also a modal pop-up that contains the form to create the new train. Everything works well, except that

问题 Is there (there must be?) a way to clear a form field that has validation errors in Spring 3? I know that clearing the "command" object properties works ... but only if there are no errors. Somehow the fields gets repopulated by Spring when there are validation errors (FieldErrors or GlobalErrors). 回答1: So I have found a solution to the problem. It works very well but It seems a bit overkill for something as simple as clearing a field. Maybe a javascript snippet is a cleaner solution? Well

问题 I have a form which allows the user to delete some data from a database. I want to have a bit of confirmation to prevent accidental deletes. I want to do the following: When submit is pressed, alert pops up with "Are you sure?" If user hits "yes" then run the script If user hits "no" then don't submit the script. How can this be done? I have added the onSubmit alert but it does not show anything, and it still submits the form. How can I delay the submission of the form to only occur when the

问题 I have a form which allows the user to delete some data from a database. I want to have a bit of confirmation to prevent accidental deletes. I want to do the following: When submit is pressed, alert pops up with "Are you sure?" If user hits "yes" then run the script If user hits "no" then don't submit the script. How can this be done? I have added the onSubmit alert but it does not show anything, and it still submits the form. How can I delay the submission of the form to only occur when the

问题 My reactive form is three component levels deep. The parent component creates a new form without any fields and passes it down to child components. At first the outer form is valid. Later on a child component adds new form elements with validators (that fail) making the outer form invalid. I am getting an ExpressionChangedAfterItHasBeenCheckedError error in the console. I want to fix that error. Somehow this only happens when I add the third level of nesting. The same approach seemed to work