ng-selector
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Angular2 selector component based on selectize.js
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<a href="../index.html">all files</a> / <a href="index.html">src/</a> ng-selector.validator.ts
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">import { Directive } from '@angular/core';
import { AbstractControl, NG_VALIDATORS, Validator } from '@angular/forms';
@Directive({
selector: 'ng-selector[required][ngModel]',
providers: [{ provide: NG_VALIDATORS, useClass: NgSelectorValidator, multi: true }]
})
export class NgSelectorValidator implements Validator {
validate (c: AbstractControl): { [p: string]: any } {
return this.isEmpty(c.value) ? { required: { valid: false } } : null;
}
private isEmpty (value: any) {
if (value === null || value === undefined) {
return true;
}
// empty array
if (Array.isArray(value) && value.length > 0) {
return false;
}
// all objects are valids
if (!Array.isArray(value) && typeof value === 'object' && Object.keys(value).length > 0) {
return false;
}
return true;
}
}
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