What is the best way to shift focus to the next input field once the character limit has been reached, especially when the input is contained

My challenge lies in having six input fields arranged side by side in a single row:

In my component.html file:

onDigitInput(event: any) {
  let element;
  
if (event.code !== 'Backspace')
  element = event.srcElement.nextElementSibling;
 
console.log('Element : ',event.srcElement)
 
if (event.code === 'Backspace')
  element = event.srcElement.previousElementSibling;

if (element == null)
  return;
else
  element.focus();
}

However, this solution has limitations as it requires all input elements to be directly adjacent without further nesting. In my case, each input is enclosed within an <li> tag, causing the functionality to fail. I am seeking suggestions for alternate solutions using functions or potentially a directive.

Answer №1

I modified the code snippet you shared to better fit the specific structure you are working with, where inputs are inside list items.

  handleInput(event: any) {
    const target = this.findNextInputElement(
      event.target,
      event.code === "Backspace"
    );

    if (!target) {
      return;
    }

    target.focus();
  }

  findNextInputElement(currentElement: Element, isBackspace: boolean): HTMLElement {
    if (!currentElement) {
      return null;
    }
    const listItem = currentElement.parentElement;
    let nextListItem = isBackspace
      ? listItem.previousElementSibling
      : listItem.nextElementSibling;
    return nextListItem?.firstChild as HTMLElement;
  }

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