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javascript - Check if first letter of word is a capital letter

Is it possible in JavaScript to find out if the first letter of a word is a capital letter?

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var word = "Someword";
console.log( word[0] === word[0].toUpperCase() );

or

var word = "Someword";
console.log( /[A-Z]/.test( word[0]) );

or

var word = "Someword";
console.log( /^[A-Z]/.test( word) );

See toUpperCase() and test()


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