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Capitalize first letter: safe against empty string

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`""[0]` -> `undefined`
`"".slice(0, 1)` -> `""`
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Ivan Babak
2017-12-11 18:29:37 -08:00
committed by GitHub
parent 62f3ffddc2
commit 649d1c3ae0
1 changed files with 1 additions and 1 deletions
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snippets/capitalize-first-letter.md
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@ -3,5 +3,5 @@
Use `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string. Use `toUpperCase()` to capitalize first letter, `slice(1)` to get the rest of the string.
```js ```js
var capitalize = str => str[0].toUpperCase() + str.slice(1); var capitalize = str => str.slice(0, 1).toUpperCase() + str.slice(1);
``` ```