Simple, extensible library for validation any kind of data ,
Written in a typescript with 100% test coverage.
Install the library with npm install v-for-validation
or yarn add v-for-validation
import {Validation} from 'v-for-validation';
const validation = new Validation()
validation.rules({
name : 'required|string',
age : 'int',
salary : 'bail|int|min:50000|max:100000'
})
validation.addResultListener((results) => {
console.log(results)
})
validation.validate({
name : 'David',
age : 28,
salary : 40000
})
Results will be an object of arrays with input keys and array of errors
that will contain error message and additional data like min, max.
type Results = {
[key : string] : {
errMsg : string,
additionalData ?: {}
}[]
}
Additional data will vary from validator to validator , if it min
validator ,
than additionalData will contain "min" field . Example `
const result = {
min : {
errMsg : 'Field should be minimum {{min}} characters',
additionalData : {
min : 8
}
}
}
By method shouldValidate
you tell validation to be triggered or not.
const validation = new Validation()
class ShouldValidateName {
shouldValidate(allData : UserData){
if(allData.role === "Admnin"){
return false
}
return true
}
}
validation.shouldValidate({
name : new ShouldValidateName()
})
validation.rules({
name : "required"
})
validation.validate({ name : "" })
This validation won't generate any error if the role
field will be Admin
Override default messages by messages
method
validation.messages({
requried : "The field is required, custom message",
min : "Field minumom is not respected"
})
You can override translations for specific validators globally.
overrideErrorMessages([
{
name : 'min',
errMsg : "must.be.other.translation"
}
])
Validators are strings separated with pipes.
Here is a list of the validators currently available.
Validator | Description |
---|---|
bail | bail will stop on first error if provided. |
omitEmpty | If provided validation won't be triggered if there is no data. |
required | check if the string or number is not empty. |
check if the string is an email ([email protected]). | |
includeCapitalLetters | check if the string includes capital letter (a-zA-Z). |
includeLowercaseLetters | check if the string includes lowercase letter (a-zA-Z). |
includeNumber | check if the string includes number. |
includeSpecialChar | check if the string includes special char. |
length [: number-number] | check if the string's length is between specified range. "length:12-54". |
match [: str] | check if the input matches the specified field. "match:repeatPassword" |
min [: number] | check if the string's length is minimun specified length. "min:8" |
max [: number] | check if the string's length is maximum specified length. "max:16" |
int | check if the input is only number. |
string | check if the input is only string. |
You can also provide your own validator via method.
validation.addValidators([
{
name : 'myOwnValidator',
validator : new MyOwnValidator(),
errMsg : "Some error message"
}
])
or you can add it globally via addGlobalValidators
method.
import { addGlobalValidators } from "v-for-validation"
addGlobalValidators([
{
name : "TestValidator",
validator : new TestValidator(),
errMsg : "Test error"
}
])
validators object should be TValidators type.
type ValidateT = {
isValid : boolean,
additionalData ?: {
[key : string] : string | number
}
}
interface Validator<T = any> {
validate(data: T[keyof T], rules: string | undefined, allData: T): ValidateT | Promise<ValidateT>,
}
type TValidators = {
[key: string]: {
validator: IValidator,
errMsg: string
}
}
import {Validation} from 'v-for-validation';
class MyOwnValidator {
validate(data) {
if(!data) {
return {
isValid : false
}
}
}
}
const validation = new Validation()
validation.addValidators({
"MyOwnValidator" : {
validator : new MyOwnValidator(),
errMsg : 'something.wrong'
}
})
validation.rules({
name : 'required|string|MyOwnValidator',
age : 'int',
salary : 'bail|int|min:50000|max:100000'
})
validation.validate({
name : 'David',
age : 28,
salary : 40000
})
It also serves as override for validator if the same key already exists.
If you wanna provide some complex validator syntax like "MyOwnValidator:returnFalse-notRealy*^",
the strings after " : " will be passed to class constructor as first argument, the second argument will be
all input data.
In general, we follow the "fork-and-pull" Git workflow.
- Fork the repo on GitHub
- Clone the project to your own machine
- Work on your fork
- Make your changes and additions
- Change or add tests if needed
- Run tests and make sure they pass
- Add changes to README.md if needed
- Commit changes to your own branch
- Make sure you merge the latest from "master" and resolve conflicts if there is any
- Repeat step 3(3) above
- Push your work back up to your fork
- Submit a Pull request so that we can review your changes
- dav697 - David Galoyan (author)
Remember, validating can be troublesome sometimes. See A list of articles about programming assumptions commonly made that aren't true.
MIT License
Copyright (c) 2020 David Galoyan <[email protected]>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.