how do I regex pattern validation to a custom editor field

[jose lara]

if (!args.element.querySelector('.custom-field-row1')) {

let row: HTMLElement = createElement('div', { className: 'custom-field-row1' });

let formElement: HTMLElement = <HTMLElement>args.element.querySelector('.e-schedule-form');

formElement.firstChild.insertBefore(row, args.element.querySelector('.e-start-end-row'));

let container: HTMLElement = createElement('div', { className: 'custom-field-container1' });

let inputEle: HTMLInputElement = createElement('input', {

className: 'e-field', attrs: { id:'capacity' }

}) as HTMLInputElement;

container.appendChild(inputEle);

row.appendChild(container);

let inputobj: TextBox = new TextBox({ placeholder: 'Class capacity' });

inputobj.appendTo(inputEle);

inputEle.setAttribute('name', 'classCapacity');                    

}

[Hareesh Balasubramanian]

Hi Jose, 

Greetings from Syncfusion Support. 

Based on your requirement, we have prepared a sample using popupOpen event, which can be viewed from the following link, 

https://stackblitz.com/edit/angular-o2phzu-mrvpf8?file=app.component.ts 

Kindly try the above sample, if you have any concerns please revert us back for further assistance. 

Regards, 

Hareesh