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index.js 307B

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  1. 'use strict';
  2. module.exports = buffer => {
  3. if (!buffer || buffer.length < 8) {
  4. return false;
  5. }
  6. return (
  7. buffer[0] === 0x89 &&
  8. buffer[1] === 0x50 &&
  9. buffer[2] === 0x4E &&
  10. buffer[3] === 0x47 &&
  11. buffer[4] === 0x0D &&
  12. buffer[5] === 0x0A &&
  13. buffer[6] === 0x1A &&
  14. buffer[7] === 0x0A
  15. );
  16. };