将字符串拆分为字符数组，并保持一定的顺序在一起（JavaScript）

Question

I have my string:

var str = '123\r\nabc';

Which I'd like to produce this array:

["1", "2", "3", "

", "a", "b", "c"]

So, I'm looking to split it by character, but to keep \\r\\n together as one element in the resulting array.

My failed attempts:

console.log(str.split(/\r\n|/)); // removes \r\n
console.log(str.split(/\r\n/)); // splits by \r\n

Answer 1

You can't do this with split alone – /(\\r\\n)?/ , for example, would leave undefined s in the result – so you'll need to resort to match instead.

var result = str.match(/\r\n|[\S\s]/g);

where [\\S\\s] is . but including newlines. Note that result will be null on an empty string.

Answer 2

You can use this regex in split:

var str = "123\r\nabc";
console.log( str.split(/(\r\n)?/).filter(Boolean) );

• Capture group around \\r\\n will make sure to capture it in the resulting array.
• filter(Boolean) is used to filter out undefined elements from array.

Output:

["1", "2", "3", "
↵", "a", "b", "c"]