TextDecoder: fatal property
The fatal read-only property of the TextDecoder interface is a Boolean indicating whether the error mode is fatal.
  If the property is true, then a decoder will throw a TypeError if it encounters malformed data while decoding.
  If false, the decoder will substitute the invalid data with the replacement character U+FFFD (�).
  The value of the property is set in the TextDecoder() constructor.
Value
  A boolean which will be true if the error mode is set to fatal.
  Otherwise, it will be false, indicating that the error mode is replacement.
Specifications
| Specification | 
|---|
| Encoding Standard # ref-for-dom-textdecoder-fatal① | 
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