ngx-custom-validators
Version:
Angular custom directives for validation
39 lines • 4.05 kB
JavaScript
import { Directive, Input, forwardRef } from '@angular/core';
import { NG_VALIDATORS } from '@angular/forms';
import { gt } from './validator';
const GREATER_THAN_VALIDATOR = {
provide: NG_VALIDATORS,
useExisting: forwardRef(() => GreaterThanValidator),
multi: true
};
export class GreaterThanValidator {
ngOnInit() {
this.validator = gt(this.gt);
}
ngOnChanges(changes) {
for (const key in changes) {
if (key === 'gt') {
this.validator = gt(changes[key].currentValue);
if (this.onChange) {
this.onChange();
}
}
}
}
validate(c) {
return this.validator(c);
}
registerOnValidatorChange(fn) {
this.onChange = fn;
}
}
GreaterThanValidator.decorators = [
{ type: Directive, args: [{
selector: '[gt][formControlName],[gt][formControl],[gt][ngModel]',
providers: [GREATER_THAN_VALIDATOR]
},] }
];
GreaterThanValidator.propDecorators = {
gt: [{ type: Input }]
};
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