Function canManipulateViaTextNodes

core/src/utils/InsertTextAtPosition.ts:13–23

* @param {HTMLElement} input * @return {boolean}

(input: HTMLTextAreaElement | HTMLInputElement)

 * @return {boolean}
 */
function canManipulateViaTextNodes(input: HTMLTextAreaElement | HTMLInputElement): boolean {
  if (input.nodeName !== 'TEXTAREA') {
    return false;
  }
  if (typeof browserSupportsTextareaTextNodes === 'undefined') {
    const textarea: HTMLTextAreaElement = document.createElement('textarea');
    textarea.value = '1';
    browserSupportsTextareaTextNodes = !!textarea.firstChild;
  }
  return browserSupportsTextareaTextNodes;
}

/**
 * @param {HTMLTextAreaElement|HTMLInputElement} input