Language: JavaScript
Label: safe
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.

Code:
function isBackslashEscaped(string: string, pos: number): boolean {
  let escaped = false;
  for (let i = pos; i >= 0; i--) {
    const char = string[i];
    if (char !== '\\') {
      break;
    }

    escaped = !escaped;
  }

  return escaped;
}