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class Greeter {
  greeting: string;
  constructor(message: string) {
    this.greeting = message;
  }
  greet() {
    return "Hello, " + this.greeting;
  }
}
 
let greeter = new Greeter("world");
 
let button = document.createElement("button");
button.textContent = "Say Hello";
button.onclick = function() {
  alert(greeter.greet());
};
 
document.body.appendChild(button);
 

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ClassKeyword
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WhitespaceTrivia
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NewLineTrivia
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WhitespaceTrivia
StringKeyword
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WhitespaceTrivia
ConstructorKeyword
OpenParenToken
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ColonToken
WhitespaceTrivia
StringKeyword
CloseParenToken
WhitespaceTrivia
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NewLineTrivia
WhitespaceTrivia
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WhitespaceTrivia
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WhitespaceTrivia
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WhitespaceTrivia
StringLiteral
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WhitespaceTrivia
ThisKeyword
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NewLineTrivia
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NewLineTrivia
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