I have the following problem I need to exclude 0 as starting digit from number input I have the following code:
<input required type="number" min="1" value="1" id="number" name="number" pattern="[^0]d+">
but it doesn't work if the user decides to manually enter number like 01234.
To make it work change the type of the input to text and use ^[1-9]\d*$ as pattern
<input required type="text" value="1" min="1" id="number" name="number" pattern="^[1-9]\d*$">
this regex won't allow any number of starting zeros ('01', '001') nor any non-numeric characters ('1b') and accepts one digit number such as 1.
example for complete working form:
<!DOCTYPE html>
<html>
<body>
<form>
<input required type="text" value="1" min="1" id="number" name="number" pattern="^[1-9]\d*$">
<input type="submit">
</form>
</body>
</html>
<input type="number" pattern="(?!0+)\d+">
Explanation
(?!0+) # not followed by any number of zeros (negative look-ahead)
\d+ # at least one digit (by implication the first one is different from zero)
Alternative
<input type="number" pattern="[1-9]\d*">
Related
I am having issues with getting a "Phone Number" input validated. I have written the regex pattern to require 10 numbers, but even when I plug in 10 numbers into the input field, I still get the error message: "Please match the requested format" and can't seem to figure out why this is.
All help and advice is greatly appreciated!
<input type="text" id="number" name="number" pattern="/^\d{10}$/" required>
Here is a code example from this page: https://www.w3schools.com/html/html_form_input_types.asp
You can directly do it with an in-build functionality of HTML.
Just use the type type="tel" and you should be good to go.
if you want 10 consecutive numbers without - you can also do: pattern="[0-9]{10}"
<form>
<label for="phone">Enter your phone number:</label>
<input type="tel" id="phone" name="phone" pattern="[0-9]{3}-[0-9]{2}-[0-9]{3}">
</form>
Just place you're input in a <form> and hit submit. It should now match.
I don't believe you need the forward slashes in your regex pattern here.
Try this:
<input type="text" id="number" name="number" pattern="^\d{10}$" required>
This is my first time using the pattern attribute. The following code is inside a <form> tag:
<input type="number" name="" placeholder="Number" pattern=".{12,13}" required>
I expect the pattern to make the number has minimal of 12 numbers and a max of 13 numbers. However, I can still submit the form with less than 12 numbers.
You can't use the pattern attribute on inputs of type number:
<input type="number"> elements do not support use of the pattern
attribute for making entered values conform to a specific regex
pattern. The rationale for this is that number inputs won't be valid
if they contain anything except numbers, and you can constrain the
minimum and maximum number of valid digits using the min and max
attributes
- MDN
As explained on MDN, you can use the min and max attributes to specify your domain:
<form>
<input type="number" name="number" placeholder="Number" min="100000000000" max="9999999999999" required />
<input type="submit" />
</form>
Alternatively, you can use an input type of text (which does allow pattern), and match for digits (\d):
<form>
<input type="text" name="number" placeholder="Number" pattern="\d{12,13}" inputmode="numeric" title="Your number must be 12-13 digits long" required />
<input type="submit" />
</form>
I need user to enter only numbers (0-9) and characters (a-zA-z)
<input type="text" pattern="^[a-zA-Z0-9]+$" />
I tried the above but this accepts a special character like :#,#$%^&*)! and no space in between
What I am looking for
Ex: Test123, 123John,
It needs to be wrapped in a <form>
<form>
<input type="text" pattern="^[a-zA-Z0-9]+$" />
</form>
Try this:
<input type="text" pattern="[a-zA-Z0-9]+" required>
I'm creating a sign-up form and one of the tags require you to enter your age. You can only create an account if you're older than 18 years old. So I thought I could achieve this by adding "pattern='18-65'". But that isn't working out. Right now, you can choose any number, even negative numbers. What am I doing wrong?
<input class="required" type="number" name="age" placeholder="Age (e.g. 25)" data-type="number" pattern="18-65">
You can set min and max attributes.
<input type="number" name="age" min="18" max="65">
Use min and max attribute to define the desired range.
<input class="required" type="number" name="age" placeholder="Age (e.g. 25)" min="18" max="65" />
how to write pattern for input type="text" (it can't be number and the validation can't be with JS) that allow me to enter only numbers, min:1 and max:5000?
<input type="text" name="someName" id="someId" required pattern=""/>
Here you go - not an input with type="number" and no JS:
<input type="text" name="someName" id="someId" required="required"
pattern="(5000|([1-4][0-9][0-9][0-9])|([1-9][0-9][0-9])|([1-9][0-9])|[1-9])"/>
The basic pattern is to match 5000 or 4-digit number or 3-digit number or 2-digit number or non-zero 1-digit number.
If you can accept 0, the pattern can be even simpler:
(5000|([1-4]?[0-9]?[0-9]?[0-9]?))
You can use the predefined min and max attribute for input type="number" as follows,
<input type="number" min=0 max=10>
<input type="submit">
Here is an example
The error for incorrect input will be displayed when you try to submit the form
Let me know if this works :)
<input type="number">
HTML Version above!