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prettier Show MutationObserver.js Source code

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  1. /* @flow */
  2.  
  3. // constructor
  4. function callback(arr: Array<MutationRecord>, observer: MutationObserver): void {
  5.   return;
  6. }
  7. const o: MutationObserver = new MutationObserver(callback); // correct
  8. new MutationObserver((arr: Array<MutationRecord>) => true); // correct
  9. new MutationObserver(() => {}); // correct
  10. new MutationObserver(); // incorrect
  11. new MutationObserver(42); // incorrect
  12. new MutationObserver((n: number) => {}); // incorrect
  13.  
  14. // observe
  15. const div = document.createElement('div');
  16. o.observe(div, { attributes: true, attributeFilter: ['style'] }); // correct
  17. o.observe(div, { characterData: true, invalid: true }); // correct
  18. o.observe(); // incorrect
  19. o.observe('invalid'); // incorrect
  20. o.observe(div); // incorrect
  21. o.observe(div, {}); // incorrect
  22. o.observe(div, { subtree: true }); // incorrect
  23. o.observe(div, { attributes: true, attributeFilter: true }); // incorrect
  24.  
  25. // takeRecords
  26. o.takeRecords(); // correct
  27.  
  28. // disconnect
  29. o.disconnect(); // correct
  30.  
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