First letter to be capitalize Jquery

This question already has an answer here:

How do I make the first letter of a string uppercase in JavaScript? 69 answers

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干得好：

data[0] = data[0].toUpperCase();

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使用Javascript Prototype ..

String.prototype.capitalize = function() {
  return this.charAt(0).toUpperCase() + this.slice(1);
}


var test = "hello";

console.log(test.capitalize())

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