I want to prevent the user from entering non-numeric characters in a textfield for telephone number in HTML5. I tried this, but it doesn't forbid non-numeric characters:
<input type="tel" name="usrtel"><br>
I tried using type=number as well, but that gives me a up and a down arrow to increase or decrease the value, which is not useful for telephone numbers. How can I accomplish this?
You can use pattern attribute with a regex \d*
<input type="tel" name="usrtel" pattern="\d*" />
Demo (After typing in the box, just click anywhere outside the box, if you type in anything except the integers, it will show a red box, else it will stay normal)
Demo 2 (With custom message and submit button)
As you commented, you can change your pattern value to ^[0-9]{3,45}$ where user will have to input minimal of 3 digits to maximum of 45 in length.
Demo
<input
type="tel"
name="usrtel"
pattern="^[0-9]{3,45}$"
title="You can only enter numbers, with a minimal of 3 characters
upto 45 characters are accepted."
required="required"
/>
In the above markup, am using a title which will throw a custom error to your user.
Related
Number pattern and max length are not working on IE.
I have tried variations of the below HTML, though IE appears to bypass that validation.
<input id="phone" maxlength="10" minlength="10" pattern="[0-9.]+" type="text">
Any suggestions on enforcing the above on IE?
The goal is to only allow 10-digits for that input field.
You can use an <input type="tel"> element, but it actually allows you to enter any characters. So, ultimately you need to specify a pattern and be very explicit as to what you are looking for and rely on HTML5 form validation. For example, if you are trying to input a phone number of the format 999.999.9999, then you want a something like the following. If you enter something that does not match the pattern and try to submit the form by hitting enter, you will get an error indication. Of course, use whatever pattern you want. If you just want digits and decimal points in any order (why?) but they must be length 10, then use pattern="[0-9.]{10}".
<form>
<input type="tel" pattern="[0-9]{3}\.[0-9]{3}\.[0-9]{4}" required>
</form>
I'm using NgX-Mask to mask my input box. I want to include special characters in the mask so i have used [dropSpecialCharacters]="false" from the NgXMask.
Because of angular validation it showing red indicator as pattern is not matched. Pattern currently using \d*
<input pattern="\d*" [dropSpecialCharacters]="false" mask="H0:00" placeholder="HH:MM" required
class="form-control" [(ngModel)]="inputValue" name="inputValue" />
Acceptance Criteria
1 In Safari it should show number keyboard by default. (input pattern="\d*") which shows number keyboard by default.
Expected Result
I want to include the ':' character to the pattern so it shows green indicator
StackBlitz Example
App Supported : IPad Only
Update
This pattern will match my input ^([0-1][0-9]|[2][0-3]):([0-5][0-9])$
but how will i bring the Number keyboard
I have found a solution which solve both my problem.
Used regexlib.com and another RexExTool for RegEx Helpers.
Used this regEx to validate my input
^([0-1][0-9]|[2][0-3]):([0-5][0-9])$
Used input mode to numeric for number keyboard in IPad.
inputmode="numeric"
<input inputmode="numeric" pattern="^([0-1][0-9]|[2][0-3]):([0-5][0-9])$"
[dropSpecialCharacters]="false" mask="H0:00" placeholder="HH:MM" required
class="form-control" [(ngModel)]="inputValue" name="inputValue" />
StackBlitz Example
1. This first text box with invalid value and text keyboard
2. The second text box with valid input and number keyboard
Abit annoying to work with since I cannot seem to get this right.
I need to get a pattern that accepts exactly 12 characters containing upper case letters and numbers. Nothing more nor less than 12 characters.
<input type="text" placeholder="Licence Number.." pattern="[A-Z0-9]+" maxlength="12" minlength="12" title="Enter Licence number">
I am going about this in a wrong way because everytime I am entering 12 characters it is activating the validation message.
You can remove the minlength attribute and use the pattern [A-Z0-9]{12} instead:
input:invalid {
color:red;
}
<input type="text" placeholder="Licence Number..." pattern="[A-Z0-9]{12}" maxlength="12" title="Enter Licence number">
The minlength attribute is not needed using the above pattern. The maxlength attribute isn't also needed with the above pattern but it stops the input after 12 chars.
At the moment your pattern allows all license numbers with at least one upper case letter or number.
I believe what you are missing in your regular expression is an exact count. Your regex will match if any input character matches your specification at least once. This means that no matter how long your input is, or how many "illegal" characters there are, if just one uppercase letter or digit is input, the regex will match.
The following will check for exactly 12 of any uppercase letter or digit.
[A-Z0-9]{12}
I have an application whereby a user has to input a minimum of 15 digits in a number type textbox.
If a user enters a longer number, sometimes >= 19 digits, and then either uses the arrows on the right or the arrow keys on their keyboard, it autoformats the number to a float with e+ at the end which, obviously, isn't ideal.
<input min="0" type="number" value="7897894561234567898">
What's the best way to either remove or counteract this behaviour? Is there anything to be done, or will I have to use a text type input? (I'd rather not).
The HTML5 <input type=number> specifically uses the same Number type as JavaScript. The maximum integer value before precision is lost is 9007199254740991, which has 16 digits.
You can't handle larger integers than that as a Number in JavaScript, you have to treat it as a string.
You should use <input type=text>, along with a pattern attribute for validation, and an inputmode attribute for touchscreens. The default validation message is not useful, so the 'invalid' event should also be handled.
(Just kidding, inputmode isn't supported anywhere. You should use <input type=tel> to show a numeric keyboard on touchscreen devices.)
<form>
<input name=num type=tel
required pattern="\d+"
oninvalid="setCustomValidity('A number is required')"
oninput="setCustomValidity('')">
<input type=submit>
</form>
There's a note in the spec about credit card numbers:
The type=number state is not appropriate for input that happens to only consist of numbers but isn't strictly speaking a number. For example, it would be inappropriate for credit card numbers or US postal codes. A simple way of determining whether to use type=number is to consider whether it would make sense for the input control to have a spinbox interface (e.g. with "up" and "down" arrows).
See: https://html.spec.whatwg.org/multipage/input.html#number-state-(type=number)
I tried the <input type="number" /> but on Opera that outputs a strange input box coupled with an "up and down" handler. What I expected was a regular text field that once you focus on it prompts the number keyboard instead of the alphabets. Is that even possible?
p.s. I'm not trying to validate. It would be a nice user experience, that's all.
Use pattern="[0-9]*"
Example number input: <input type="number" pattern="[0-9]*" />
Example phone input: <input type="tel" pattern="[0-9]*" />
Note: Browsers that do not support type="tel" will default to a text type
Beware: Using type="number" can cause problems with some browsers and user experience for credit card, postal code, and telephone inputs where a user might need to enter punctuation or a comma being in the output.
References:
http://bradfrost.com/blog/mobile/better-numerical-inputs-for-mobile-forms/
http://danielfriesen.name/blog/2013/09/19/input-type-number-and-ios-numeric-keypad/
The official HTML5 way to handle phone numbers is:
<input type="tel">
You may not have liked the "strange input box" you got with Opera when you used<input type="number" />, but that really is the appropriate type of input area when you want to require visitors to enter a numeric value.
type="number" is HTML5 and many phones do not support HTML5.
For call link you can use type="tel" or
Special A.
You should look at CSS WAP extensions (page 56) too.
EDIT 10/2015:
Most if not ALL smart phones support HTML5 and CSS3, so type="number" is the best way.
This post is now invalid. All smartphones support HTML5 and CSS3 now, so adding type="number" does in fact prompt the number pad to pop-up. I just checked it on 2 different Android versions, and an iPhone. Just so no one in the future tries WAP instead of the correct HTML5 format.
This will work on mobile and will prevent the letter "e" (along with all other letters) from being allowed to be typed in in the desktop version of your page. type="number" by itself still normally allows "e" per spec:
<input pattern="[0-9]*" type="text" oninput="this.value=this.value.replace(/[^0-9]/g,'');">
If you use type="number" in the above, then if you type "123" then "e" the oninput JS will replace all contents of the box. Just use type="text" if you really just want integer values.
You can control the style of keyboard that comes up on input focus, independently of the input type, with the HTML attribute inputmode. What you're probably looking for is inputmode="numeric", which shows a number pad with 0-9. There are other options, such as a number pad with # and *. See the docs linked below.
This is ideal for uses cases where type="number" would not work, such as numbers formatted with dashes.
https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/inputmode
Try <input type="number" pattern="/d*">
OR
<input type="tel" pattern="/d*">
This will help if you working with Android.