What will be the correct regex pattern for an HTML input which should allow only Letters, digits and #/./+/-/_. No spaces.
You can use this regex for no space:
<form>
<input type="text" pattern="[^' ']+" />
<input type="submit" value="test submit">
</form>
So you can modify it to add your other rules
If characters order and count does not matter you can use this:
^[-a-zA-Z0-9#\.+_]+$
Scratch that, there's actually a regex for that.
<input type="text" pattern="^\S+$">
That would work for MyName, but not for My Name.
Related
So I'm trying to make a form for my assignment, and I am using the pattern attribute in html so only certain characters are required to be typed on the text box. But for some reason, the form is saying using that I'm using an incorrect format even though I made my pattern attribute that way.
Here's an example of the code and a picture of the problem.
<form>
<label for="mnumber">Mobile Number:</label>
<input type="text" required id="mnumber" pattern="[0-9]"><br><br>
<input type="submit" value="submit">
</form>
You did write:
pattern="[0-9]"
You are asking for only one number. You just forget to add '+' to accept more than one number. I guess what you are searching for is this:
pattern="[0-9]+"
pattern="[0-9]"
allows for only a single number character to validate (and be submitted). If you want to allow more than one character, here's your options:
One or more numbers:
pattern="[0-9]+"
Zero or more numbers:
pattern="[0-9]*"
One to three numbers:
pattern="[0-9]{1,3}"
you just need to change type="text" to type="number"
Hey for some reason when i use this(pattern="[A-Za-z]") in my input field nothing will be accepted?
When I enter "Ruben" in this field it just says "make sure the format complies with the requested format"?
Thank you for your help
The pattern matches exactly one character. Add a + quantifier after the character class to make it match one or more of those characters.
The reason is that [A-Za-z] matches single character, Ruben is 5 hars long.
You should use [A-Za-z]+ for pattern instead, which will accept one or more of letters.
You could also use anchors ^[A-Za-z]+$ to make sure input consists of only letters.
<form>
<div>
<label for="uname">enter test string </label>
<input type="text" id="uname" name="name" required size="45"
pattern="^[a-zA-Z]+$" title="enter test string">
<span class="validity"></span>
<p>Input must be at least one letter and ocnsist of only letters.</p>
</div>
<div>
<button>Submit</button>
</div>
</form>
Attempting to use a regex pattern for an HTML input element that limits the characters to 0-9, ",","-",".","$"
I have very little experience in regex and used the pattern=[0-9,.-$] on the input element and it does not work. Though I plan on studying regex intensely in the future, I need a little help on this for now. Thank you.
<form>
<input name="currency" pattern=[0-9,.-$]>
<button>Submit</button>
</form>
don't use regex, use native type="number" that will do job for you with no need for regex
coverage is almost full > https://caniuse.com/#feat=input-number
<form>
<input type="number" name="currency">
<button>Submit</button>
</form>
You have two problems.
- indicates a range, you already used it as such for 0-9. .-$ isn't a valid range. A validator would have highlighted this for you. You need to escape the -.
You are only matching one character. You need to match multiple so use something like + to mean one or more
<form>
<input name="currency" pattern="[0-9,.\-$]+">
<button>Submit</button>
</form>
I want to validate below input with Alphanumeric and ()._-‘ symbol only.
<input type="text" name="companyName" value="" pattern="[A-Za-z0-9()._-‘]+" title="Alphanumeric with symbols ()._-‘ only" required> </p>
But, when I try the input, only ._‘ can be used, ()- are not working.
You need to escape those characters. They have significance in RegEx and aren't treated as part of the expression. Try the following: [A-Za-z0-9\(\)._\-‘]+
Works fine for me, with the exception of the '-' which probably needs to be first:
[-A-Za-z0-9()._‘]
Try the code below. I don't know why, but the order for the pattern attribute matters.
<form>
<input type="text" name="companyName" value="" pattern="[A-Za-z0-9()_.'-]+" title="Alphanumeric with symbols ()._-‘ only" required>
<input type="submit">
</form>
I am trying to come up with a valid pattern for an HTML form. I would like to allow *#student.*.edu.vn
This is my code:
<input
type="text"
name="mail"
pattern="([a-z]|[0-9])+(#{1})+(student)+(.)+[a-z]+(.edu.vn)"
/>
It does not work as I would like. What I am doing wrong?
The pattern (regular expression) is slightly wrong as you haven't escaped all your special characters such as the . and have some unnecessary parts within it. Try using the following slightly modified pattern instead:
([a-z]|[0-9])+#student\.[a-z]+\.edu\.vn
<form>
<input type="text" name="mail" pattern="([a-z]|[0-9])+#student\.[a-z]+\.edu\.vn" />
<input type="submit">
</form>
Note: Make sure that you also do validation on the server-side as anyone entering values into a form can remove the pattern to bypass this check.
I came up with this solution which is slightly more easy to read and is less strict (which is a good thing because e-mail addresses can contain a lot more characters than just lowercase alpha-numeric ones. Don't forget to do proper validation on the backend using an e-mail validator.
<form>
<input
type="text"
name="mail"
pattern=".+#student\..+\.edu.vn"
/>
<input type="submit">
</form>