removeStart method

@useResult String? removeStart(String? start, { bool isCaseSensitive = true, bool trimFirst = false, })

Returns a new string with start removed from the beginning, or null if the result is empty.

When isCaseSensitive is false, uses case-insensitive matching. When trimFirst is true, the string is trimmed before checking.

Implementation

@useResult
String? removeStart(
  String? start, {
  bool isCaseSensitive = true,
  bool trimFirst = false,
}) {
  if (trimFirst) {
    return trim().removeStart(start, isCaseSensitive: isCaseSensitive);
  }

  if (start == null || start.isEmpty) {
    return this;
  }

  if (isCaseSensitive) {
    return startsWith(start) ? substringSafe(start.length).nullIfEmpty() : this;
  }

  return toLowerCase().startsWith(start.toLowerCase())
      ? substringSafe(start.length).nullIfEmpty()
      : this;
}