AutoSizeInput() — react Function Reference

Source Code

packages/react-devtools-shared/src/devtools/views/Components/NativeStyleEditor/AutoSizeInput.js lines 21–58

export default function AutoSizeInput({
  className,
  onFocus,
  placeholder = '',
  testName,
  value,
  ...rest
}: Props): React.Node {
  // $FlowFixMe[missing-local-annot]
  const onFocusWrapper = event => {
    const input = event.target;
    if (input !== null) {
      input.selectionStart = 0;
      input.selectionEnd = value.length;
    }

    if (typeof onFocus === 'function') {
      onFocus(event);
    }
  };

  const isEmpty = value === '' || value === '""';

  return (
    // $FlowFixMe[cannot-spread-inexact] unsafe rest spread
    <input
      className={[styles.Input, className].join(' ')}
      data-testname={testName}
      onFocus={onFocusWrapper}
      placeholder={placeholder}
      style={{
        width: `calc(${isEmpty ? placeholder.length : value.length}ch + 1px)`,
      }}
      value={isEmpty ? '' : value}
      {...rest}
    />
  );
}