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81
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回答

写法一:

let name = 'hello'
name.charAt(0).toUpperCase() + name.slice(1)
写法二:

let name = 'hello'
name.slice(0, 1).toUpperCase() + name.slice(1)
写法三:

let name = 'hello'
name.substring(0, 1).toUpperCase() + name.substring(1)

网友回复

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