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Javascript Split string on UpperCase Characters

How do you split a string into an array in JavaScript by Uppercase character?

So I wish to split:

'ThisIsTheStringToSplit'

into

['This', 'Is', 'The', 'String', 'To', 'Split']
Solution

  • I would do this with .match() like this:

    'ThisIsTheStringToSplit'.match(/[A-Z][a-z]+/g);

    it will make an array like this:

    ['This', 'Is', 'The', 'String', 'To', 'Split']

    edit: since the string.split() method also supports regex it can be achieved like this

    'ThisIsTheStringToSplit'.split(/(?=[A-Z])/); // positive lookahead to keep the capital letters

    that will also solve the problem from the comment:

    "thisIsATrickyOne".split(/(?=[A-Z])/);