Non Invasive Form Error Notifications
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Form Validation Error Messages Javascript
vote favorite 1 I am implementing a business application and wounder what's the best way to validate forms, and when. An example is a form where three textfields where a currency amount is expected. A valid input is of the form D.dd where d is a digit and D is one or more digits. When to validate? When the user is typing (e.g. validate the input after every char is typed). A problem is if the input needs to error message html css be in an invalid state before it gets valid. When the focus of the textfield is lost. When the users press the submit button. How to validate? Prevent "invalid" characters beeing typed e.g. letters in a number or a currency field. Show an error indication (e.g. red border or show the input value in red text-color). Prevent the user moving focus (it's important that the default value is valid in this case) and show error indication. My current solution is to have a valid default value e.g. 0.00 for currency and 1 for quantity. And prevent letters beeing typed in currency and number fields. Sometimes the input needs to be in a invalid state, so I only validate when the focus is leaving the field. If the value is invalid, I keep the focus and show an indication. An empty field will be filled with the default value. But I don't know if this is good usability practice. forms usability user-behavior notification validation share|improve this question edited May 12 '13 at 4:05 JohnGB♦ 57.7k19154265 asked Oct 2 '11 at 14:00 Jonas 291314 add a comment| 3 Answers 3 active oldest votes up vote 7 down vote accepted One solution is to wait for a period of inactivity in that form field (say 1 second) before validating it. Of course you should also validate as soon as the focus has moved. Preventing invalid characters from
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How To Display Error Message In Html Using Javascript
Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Alternative way to notify the user of an http://ux.stackexchange.com/questions/12229/when-and-how-to-validate-forms-in-a-usability-perspective error up vote 0 down vote favorite I have a winform software that communicates with hardware through a protocol. Sometimes error in communication happens and i would like to notify the user. Errors could be for example: timeouts, crc errors, physical disconnection etc... I have a communication window in which i show these errors, but by default this is hidden. The user can open it though the http://stackoverflow.com/questions/2878043/alternative-way-to-notify-the-user-of-an-error menubar. Popups are annoying to the user (and to myself) so i would like a un-invasive way to notify the user that an error has occurred. Perhaps a info bubble like when XP tells you updates are ready for your computer? I know that NotifyIcon can help put things in the system tray, which i do not wish to have. I'd rather keep it within my MDI. I'm open to other creative ideas as well. c# .net winforms popup share|improve this question asked May 20 '10 at 21:36 Roast 89531628 add a comment| 4 Answers 4 active oldest votes up vote 2 down vote There are several alternatives that can be employed when an error occurs, each with their own advantages and disadvantages: MessageBox popups Display a message box popup to the user. Advantage: since it is modal, the user has to acknowledge the error to continue. Disadvantage: since it is modal, it interrupts the user from whatever they were doing. Multiple errors are also inconvenient, requiring multiple confirmations. Show the communication window If your existing communication window is hidden, display it to make the logged error visible. Advantage: uses the existing familiar communication mechanism. Disadvantage: if the
Submission UsabilityBy Raphael CaixetaWeb forms play a big part in every day web use. If you build and/or run websites, chances are, you have a web form in it, whether http://sixrevisions.com/user-interface/10-tips-for-optimizing-web-form-submission-usability/ it's a simple contact form or a rich and robust web app. There are several ways to make sure your web forms are optimized for your users. Here are some tips for making sure that your form submission process is user-friendly.1. Clearly Highlight Required FieldsIt's annoying as a user to submit a web form only to later find out that you've missed required error message input fields.A common convention for highlighting required fields is to have an asterisk (*) beside their label. Explicitly stating that an input field is required or that the field is optional is a safe way to go.The Zappos.com registration web form highlights required fields with an asterisk (*). Optional fields are explicitly stated.2. Provide User-Friendly and Descriptive Error MessagesI'm sure you hate it error message in when you make a mistake in a web form and all the error says is "You must fill out all of the required fields below," when they should really provide a more specific error message like "You forgot to enter your e-mail address."Performing real-time data validation as the user is filling out the web form is a good solution to ambiguous error messages. For example, immediately after filling out the email address input field, the web form should check whether it's in the correct format, and if it isn't, the user is immediately notified.Yahoo!'s sign up form provides meaningful real-time error messages even before the form is submitted.Read about best practices for hints and error-validation in web forms.3. Use Client-Side (JavaScript) Data Format ValidationUsing JavaScript data validation saves the user time, as well as reduces the amount of work your web server has to perform to process incoming web form submissions. Client-side error validation allows you to let users know they've made a mistake right away, instead of after they've submitted the form. This is good for any input fields that don't need to check your dat