@terminus/ngx-tools
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50 lines • 5.59 kB
JavaScript
import { FormGroup, } from '@angular/forms';
/**
* Determine if a form control has a required validator
*
* @param formItem - The control or form group to check
* @returns If a required control is found
*
* @example
* const ctrl = new FormControl(null, [Validators.required];
* const group = new FormGroup({myControl: [null, [Validators.required]]});
* hasRequiredControl(ctrl); // Returns: true
* hasRequiredControl(group); // Returns: true
*/
export function hasRequiredControl(formItem) {
if (!formItem) {
return false;
}
// Dealing with FormGroup
if (formItem instanceof FormGroup) {
var isRequired = false;
// Check each control within the group
// eslint-disable-next-line @typescript-eslint/prefer-for-of
for (var i = 0; i < Object.keys(formItem.controls).length; i += 1) {
var control = formItem.controls[Object.keys(formItem.controls)[i]];
isRequired = controlHasRequiredField(control);
// Break out of the loop when we find the first required control
if (isRequired) {
break;
}
}
return isRequired;
}
// Dealing with AbstractControl
return controlHasRequiredField(formItem);
}
/**
* Determine if a form control has a required validator
*
* @param control - The control to test
* @returns If the control is required
*
* @example
* const ctrl = new FormControl(null, [Validators.required];
* controlHasRequiredField(ctrl); // Returns: true
*/
function controlHasRequiredField(control) {
var validator = control.validator ? control.validator({}) : null;
return !!(validator && validator.required);
}
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