27 lines
970 B
Markdown
27 lines
970 B
Markdown
---
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title: toTitleCase
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tags: string,regexp,intermediate
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---
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Converts a string to title case.
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- Use `String.prototype.match()` to break the string into words using an appropriate regexp.
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- Use `Array.prototype.map()`, `Array.prototype.slice()`, `Array.prototype.join()` and `String.prototype.toUpperCase()` to combine them, capitalizing the first letter of each word and adding a whitespace between them.
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```js
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const toTitleCase = str =>
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str
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.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
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.map(x => x.charAt(0).toUpperCase() + x.slice(1))
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.join(' ');
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```
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```js
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toTitleCase('some_database_field_name'); // 'Some Database Field Name'
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toTitleCase('Some label that needs to be title-cased');
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// 'Some Label That Needs To Be Title Cased'
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toTitleCase('some-package-name'); // 'Some Package Name'
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toTitleCase('some-mixed_string with spaces_underscores-and-hyphens');
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// 'Some Mixed String With Spaces Underscores And Hyphens'
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```
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