I'm making a database where you can insert customers.
By the initials of every forename I want to check if it's in the right order.
I want it as: "T.L.R." with the dots between every initial.
To check this, I want to use a pattern.
What I got now is this:
<input required="true" type="text" required pattern="[A-Za-z]{1}+\.[A-Za-z]{1}+\.[A-Za-z]{1}+\.">
This code doesn't do anything.
Does anyone know the answer?
Thanx in advance!
You are combining {1} which means exactly 1, and + which means 1 or more. That does not work.
Try this:
[A-Za-z]\.[A-Za-z]\.[A-Za-z]\.
Since [] by default already means exactly 1, you can also drop the {1}
This does mean that you need exactly 3 characters in your initials, so I.K. will not count.
If you want to use 1 character, followed by a dot, and that repeated you can use this:
([A-Za-z]\.)+
Also, don't forget to add the prefix ^ a postfix $ to match the whole string:
^([A-Za-z]\.)+$
As some have said, the regex pattern should be rewritten to
[A-Za-z]{1}\.[A-Za-z]{1}\.[A-Za-z]{1}\.
The required pattern works well when using a form tag. Try:
<form action="customer">
Country code: <input type="text" name="country_code" pattern="[A-Za-z]{1}\.[A-Za-z]{1}\.[A-Za-z]{1}\." title="A.B.C.">
<input type="submit">
</form>
your regex should be like this if you want every character capital with dots in between
> /[A-Z]\.[A-Z]\.[A-Z]\./g
Related
Try check if input filed start with blank space, after testing e few hours and searching and testing a lot of patterns, found on internet, it doesn't work.
What i want: check if html5 input field start with character (no blank space), but in the text are blank spaces allowed.
At the moment the best solution i found, but it doesn't work:
<input type="text" class="naamveld" placeholder="Fullname" pattern="^\S+$" required>
Someone can help me with this 'simple' thing?
You should use a regular expression like this:
^[^-\s][\w\s-]+$
like it is explained in this question
According to your question, you said you wanted to remove all the whitespaces in the input, try this:
<input type="text" class="naamveld" placeholder="Fullname" required onkeydown="this.value = this.value.trim()" onkeyup="this.value = this.value.trim()">
If you try adding spaces at the beginning and end of the input, it will remove them.
How it works
The input has two attributes, (onkeydown and onkeyup) these functions will perform when the input receives a keyup or keydown, and will remove all whitespaces from the value of the input using this.value = this.value.trim()
If you want to learn more on how the trim() function works, you can go here.
First of all, again sorry for my bad english :-s
I want thanks everyone for all this useful info. When looking to the answers and solutions, with our help this is the solution (see pattern):
<input type="text" pattern="^\S.*$" ...>
Checked if input field started with blank space(s).
This is for me the best and simplest solution :-)
I am developing a view using html5, I want to validate a VIN field with some particular regex pattern,
So I used data-val-regex-pattern to achieve this.
My validation is to not allow the user to enter i,o,q,I,O,Q he can enter anything in a-zA-Z0-9
So I have written the regex as ^[a-zA-Z0-9&&[^iIoOqQ]]$this regex is not working.
Not working mean when ever I enter ghtygfrt9090 it is saying invalid.
Below is the code:
<input type="text" maxlength="17" data-val-regex-pattern="^[a-zA-Z0-9&&[^iIoOqQ]]$" data-val-regex="VIN is not valid">
Please help !!
The pattern you tried ^[a-zA-Z0-9&&[^iIoOqQ]]$ does not have a quantifier for the character class and if supported will match only a single occurrence of the listed.
Repeating it would look like ^[a-zA-Z0-9&&[^iIoOqQ]]+$
In some regex engines, you could use character class intersection using $$
If it is not supported, you could make use of a negative lookahead:
^(?!.*[iIoOqQ])[a-zA-Z0-9]+$
Regex demo
Another option is to update the ranges excluding the chars
^[a-hj-npr-zA-HJ-NPR-Z]+$
Regex demo
I'm supposed to be accepting only usyd.edu.au email addresses. The validation works, but it also works with usyd.edu.a emails. I want it to accept only when complete .au is entered. The pattern I have which works so far is:
input type="email", placeholder="Email" name="txtName" id="txtEmail" pattern="[a-z0-9._%+-]+#[usyd]+\.[edu]+\.[au]"/>
Close but not right.
[a-z0-9._%+-]+#[usyd]+\.[edu]+\.[au]
[a-z0-9._%+-]+ simple enough Allow a-z or 0-9 or . or _ or % or + or -
# only allow #
[usyd]+ allow one or more of u, s, y or d. Which could just be 'u'
\. only allow .
But the suggestion from Austen is also wrong:
[a-z0-9._%+-]+#(usyd)+\.(edu)+\.(au)
(usyd)+ would allow you to enter 'usydusydusyd'
(edu)+ would allow you to enter 'edueduedueduedu'
There is no reason for the parenthesis. and you definitely do not want the '+' since that allows one-or-more.
Instead you want this:
^[a-z0-9._%+-]+#usyd\.edu\.au$
This will make sure that nothing odd exists at the beginning of the string (The '^') and that the string ends with '#usyd.edu.au' (The '$')
input:invalid {
background: red;
}
<input type="email", placeholder="Email" name="txtName" id="txtEmail" pattern="[a-z0-9._%+-]+#usyd\.edu\.au"/>
You almost got it! If you change the square brackets [] in the last 3 places in your regex to be round brackets () then it will work as expected.
ex: [a-z0-9._%+-]+#(usyd)+\.(edu)+\.(au)
Here's why:
[au] will match a SINGLE character found within the brackets. (Either an a, or u)
(au) will match EVERYTHING found inside the brackets. (Exactly au)
I can't seem to get the pattern attribute to work for the HTML form validation. I have seen a lot of tutorials and it all says the same and it works for them. Though I am using the same technique as the tutorials, I can't get it to work. For an example, please see the below code.
<label for= "firstname" id="firstname">First Name*</label>
<input type="text" name="firstname" pattern="[A-Za-z]" title="Only Alphabets" required/>
I want only alphabets to be inserted into this text box. When I insert numerals, it does ask to match the requested format which is only alphabets. But even when I enter alphabets it shows the message though it is supposed to let me submit the form. I tried all I can but can't seem to find a solution for this due my lack of knowledge. I would really appreciate if you could let me know how to enter only numbers into a field, only alphabets into a field, numbers and alphabets into a field using the pattern attribute for validation. Moreover, I was wondering whether the pattern attribute would be able to help me with this as well. For the National ID text box, I want the user to insert data in a specific format. Like this "A000000". An A in the first followed by 6 digits and if this format is not followed, then to display the message asking to match the requested format. Thank you so much in advance. (Please keep note that I am not using jquery).
Edit
May I please know how to add ' (apostrophe) along with the alphabets? Moreover pattern="[A-Za-z]+" wont let me insert spaces between words. How do I fix that?
The pattern field uses regular expressions. Try:
pattern="[A-Za-z]+"
For the national ID you could use:
pattern="A[0-9]{6}"
I'm working on a simple check for my input fields. I got 3 places where I'm validating user-input: javascript regex, html pattern and php regex. The Javascript and PHP part work fine, but my HTML pattern somehow returns an error for every input except blank. I tested it on regexpal.com (regex tester) and it works perfectly fine there, so I reckon I must be doing something wrong.
Here's my regex:
/^[a-zA-Z0-9\!\?\,\.\s]{0,50}$/
I'm trying to allow users to input the following:
Alphabetic characters, including capitals
Numeric characters
Puncation: exclamation(!), question(?), comma(,) and dot(.)
Spaces
Here's how I implement it:
<input type="text" id="name" name="name" aria-required="true" pattern="/^[a-zA-Z0-9\!\?\,\.\s]{0,50}$/" value="loaded value from db">
Please note: I'm allowing 0 characters to be entered because I will check it with PHP, and if the input field(s) is/are empty, a pre-set value will be written to the database.
Basically it should allow users to enter general words or sentences, but somehow it doesn't allow anything. The only way I don't get an "error" is when I leave the inputfield blank. What am I doing wrong? Is my regex wrong? Am I not implementing it correctly? I can provide more code if necessary.
Help is much appreciated!
Thanks in advance.
Try removing the forward slashes (/) from the input's pattern attribute.