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regexuppercaselowercasecamelcasing

change case with regex

I want to convert this text

font-size-18

to this

fontSize18

using Regex. Here is my trail:

let conv = str => str.replace(/\-[a-z]/gi,/[A-Z]/gi);

but it doesn't work, I can do it without Regex. But I want to make it with Regex, can this be done using regex?

Solution

  • Match the dash followed by a single character, and use a replacer function that returns that character toUpperCase:

    const dashToCamel = str => str.replace(/-(\w)/g, (_, g1) => g1.toUpperCase());
console.log(dashToCamel("font-size-18"));

    This assumes that all dashes are followed by word characters (though you could use . instead of \w). Note that since it looks like you want to replace all dashes, you should match and replace all dashes, not just dashes followed by alphabetical characters.