I have a camelcase string e.g. thisIsCamelcaseString

I'd like to remove the first lowercase characters from from the string.

To achieve this, I think I'm looking for a regular expression that will match from the first capital letter in the string to the end. In this example it would remove this, returning:

IsCamelcaseString

I have a camelcase string e.g. thisIsCamelcaseString

I'd like to remove the first lowercase characters from from the string.

To achieve this, I think I'm looking for a regular expression that will match from the first capital letter in the string to the end. In this example it would remove this, returning:

IsCamelcaseString

• javascript
• regex

2 Answers 2

This is one way to achieve it:

console.log('thisIsCamelcaseString'.replace(/^[a-z]+/, ''));

This uses the ^ anchor which matches the string from beginning and then searches for the smallcase letters.

You can use this regex

[A-Z]\S+

Demo

This matches the first capital letter with [A-Z] and then any other non-blank characters with \S+.

If you want to match only letters you can use

[A-Z][a-zA-Z]+