I am trying to use Pattern attribute to do validation on text box.
When ever user entered any of these .....i want to show some validation message.
So i created that element as follows:
<input type="text" pattern="/(<!|&#|<\?|<|>)/" title="Required" required />
When ever i entered any text it is showing the alert...
How to get rid of this?
You were using the wrong pattern. In HTML patterns, you don't need an opening and closing delimiter. Also, the browser checks, if the entered text MATCHES the pattern, but you would need the exact opposite (if I understood it correctly). Try something like this:
<form>
<input type="text" pattern="^((?!(<)|(<!)|(<\?)|(&#)|(>)).)*$" title="Required" required />
<input type="submit" />
</form>
Related
I have an HTML page with a text input field for a search string. I would like to give focus to the field when the user hits a predefined key (like META-S).
A similar behaviour is possible for anchors in HTML 5:
CSS3
I am wondering if there is a more specific solution than to have a JS function listening to all key presses and filtering for the correct one.
You should already be using <label /> for all your form inputs (for accessibility purposes) .. <label /> can have the accesskey attribute.
Example:
<label for="search" accesskey="s">Search:</label><br />
<input type="text" id="search" width="100" />
I create a form, where one field should only be filled with numbers.
I want that field can be filled only with numbers since entering input.
Like this example :
How Can I Use Javascript to Allow Only Numbers to Be Entered in a TextBox?
I've tried using Regex, but when I try to input is still able to enter letters.
<input type="number" min="2" pattern="^[0-9]" class="andi_input required-entry" name="amount" id="amount" required title='Only Number' />
I want it when input to field and not after click the Submit button and the message appear and inform that the field can only be filled with numbers.
I also try to add validate-number, but the result is the same.
How, without javascript, so that the field can only be filled with numbers or letters?
Whether for this kind of case have to use JavaScript or is there another way without JavaScript?
HTML 5 uses the type="number" so make sure that the browser that you are using is compatible. Check it out in action here.
You should check browser compatibility.
You're right with <input type="number" pattern="^[0-9]" />.
Your regex rule is :
^[0-9] :
^ assert position at start of the string
[0-9] match a single character present in the list below
(0-9 a single character in the range between 0 and 9)
You can check your regex here.
I use to use HTML5 Validation and jQuery one because IE is capricious most of the time.
UPDATE :
Without Javascript it's not possible to check pattern on real time. I suggest you to use a jQuery library like : http://www.jqueryscript.net/form/jQuery-Plugin-For-Formatting-User-Input-with-Specified-Pattern-formatter-js.html.
Here is a OneLiner:
<input type="number" onkeypress="return /[0-9]/i.test(event.key)">
or
<input type="text" onkeypress="return /[a-z]/i.test(event.key)">
So I have an input form in Angular here:
<input ng-model="sc.zip" class="form-control" maxlength="5" type="text" />
I don't want type="numbers" because the form needs to be a plain empty textbox. However, I only want the user to be able to type numbers. Either I need to detect when the input is not a digit, or be able to search through the box to find non-digits when submitting.
Either way, I need to validate that the form is digits only. Any help would be appreciated!
use regex
<input name="title" type="text" ng-model="sc.zip" ng-pattern="/^[0-9]*$/" required/>
If user have used small letter in the field then validation is working like
aBCD1234
Not working means form will not submit
ABCD1234
Now user will submit the form.
No need to use JavaScript (and especially not jQuery):
<input type="text" pattern="[A-Z0-9]{8}" />
Adjust the pattern as needed, but this will stop form submission of invalid input, even when JavaScript is disabled. It's also simpler to program.
MDN Doc on HTML pattern attribute: https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/pattern
How about:
<input type="text" onkeyup="this.value = this.value.toUpperCase();" />
Add return isValid(); in the onclick event of the submit button:
<input type="button" onclick="return isValid();" />
The isValid function is described well in #janaspage's answer
I have a form that is validated by js when the user submits it. My code detects empty and invalid fields (ex 1 number in phone number is obviously an invalid phone number).
I am asked if i could highlight fields missing or in error. I think this would be cool IF i can do it automatically. With HTML like the below how can i make name, phone or whatever else turn red? i cant think of any solution. Maybe i can pull the html body from form find the target input and insert a div on the left side of the input to the prev tag and use that div to make the font red. But i HATE that idea because that requires poking the HTML instead of DOM and i am pretty sure some nastiness will occur. Any ideas?
Name: <input type=text name="Name"/>
Phone: <input type=text name="PhoneNo"/>
Change your HTML to have the <label> surrounding the 'Name' and 'Phone', which will make it more accessible and provide the functionality you're looking for.
HTML
<label for='Name'>Name:</label> <input type=text name="Name"/>
<label for='PhoneNo'>Phone:</label> <input type=text name="PhoneNo"/>
jQuery
$('input').blur(function() {
$('label[for="'+$(this).attr('name')+'"]').css('color','red');
});
Live Example
http://jsfiddle.net/tve8J/
You'll of course have to add your validation, I don't know what you consider and 'invalid field'
You should rather write your HTML to have an element around the labels in the first place. The correct HTML would be
<label for="Name">Name:</label> <input type="text" name="Name" id="Name" />
Then just add a class to the label to turn it red when it should.
By the way, this even makes the input receive focus when the label is clicked! Yay!
such as:
//some javascript validation here
name.style.color = 'red';
phoneNo.style.color = 'red';
?
How about labels with the for attribute? - Check out its documentation here