allow only negative numbers in angular 5 textbox Please enter Lower Band Rng Enter Lower Band Rng here ...

I have an Angular form where the following validation should happen: checkbox === ticked then validate the input else no validation checkbox == ...

User is going to input in the form and only allowed numbers separated by comma. I want to allow space after comma but not before comma and white spac ...

This is my code I want if the userId equal to 1 then the firstname last name and email does not required otherwise those 3 fields change to require ...

I am looking for a regular expression to match valid port numbers (1-65535) listed in a text area. The input will look like this: and so on, so I n ...

config.newValue has value as "888888888888" and config.regex has value as "/[0-9]{12}/" variable matches should return value as true but it is retu ...

I'm trying to implement an Async validator on a FormControl which relies on the value of another field of the same form. To accomplish this same task ...

I'm trying to write a custom validator for 2 text boxes, with some conditions. Please see the code I wrote in Stackblitz Link to validate the text bo ...

in this example I am. trying to validate the start date and end date but I am facing an error in it can someone suggest me right direction. please hel ...

I have a custom validator on the field postalCode: which checks another field isPotalCodeRequired to see if validation should be applied to the pos ...

I've setup this basic component with npm 8.3.1/node 16.14.0/angular 13.3.4 : and a such sample compoment : Why does the hell can I've got this e ...

I have created an angular project in version 13. I have followed the link (https://coryrylan.com/blog/creating-a-dynamic-checkbox-list-in-angular) to ...

Stackblitz: https://angular-ivy-mhot2x.stackblitz.io For my Angular (13.0.2) application, I've created a validator to check if a URL is already in us ...

I want to combine a set of validations to a bundle, and then re-use it, but it is not working for me, when I apply the validation bundle the control i ...

I have a form where a user can register thesmselves or a guest. If a user is registering themselves, I don't need to validate guest info input fields, ...

I have a input field type number and I want to achieve the following scenario. Value length should be less than 5. (Max Length 5) If above condi ...

I have one parent Angular Form that I wish to use in a number of sub components. To do this, I instruct my sub component to reuse the parent form: ...

So I have a form where a control is required only if another control has a value, for this I created the following structure }); this function wor ...

I'm doing a custom validation for an ISBN number, I already have the function that checks the number and works perfect giving me the response by conso ...

I have a custom async validation function. It works well, but before submitting, I check if the Form is valid - it isn't. It's in PENDING status. How ...