Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0 + fetch API code example

Example 1: Uncaught (in promise) SyntaxError: Unexpected token O in JSON at position 0

var stringified = JSON.stringify(data);
var parsedObj = JSON.parse(stringified);
 
console.log(parsedObj);

Example 2: fetch SyntaxError: Unexpected token < in JSON at position 0

JSON.parse(theStringThatIsNotJson);

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Javascript Example

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