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var colorText = "red,blue,green,yellow";
colorText.split(/[^\,]+/);
// ["", ",", ",", ",", ""]
var colorText = "red,blue,green,yellow";
colorText.split(/[^\,]+/);
// ["", ",", ",", ",", ""]
regularly matches non-comma content. Split uses the matching content as a knife to cut the string into two halves
there is actually an empty string before red. Similarly, there is an empty string
after yellow, and your regular character is separated by characters other than comma [1,], so three commas plus two empty strings
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