String.prototype.replace
We can call the replace method with a regex to search for all line breaks in a string and replace them all with empty strings to remove the line breaks.
For instance, we can write:
const trimmed = 'abc\r\ndef'.replace(/(\r\n|\n|\r)/gm, "");
console.log(trimmed)
to remove all the line breaks.
\r and \n are the patterns for the line breaks.
g lets us search the whole string for all instances of line break characters.
Therefore trimmed is 'abcdef' .
We can also use the control code character equivalent in place of \r and \n by writing:
const trimmed = 'abc\r\ndef'.replace(/\[^\x20-\x7E\]/gmi, "")
console.log(trimmed)
\x20 is equivalent to \r .
And \x7E is equivalent to \n .
String.prototype.trim
The trim method lets us remove all line break characters from the start and end of a string.
For instance, we can write:
const trimmed = 'abc\r\n'.trim()
console.log(trimmed)
Then trimmed is 'abc' .
String.prototype.trimStart
The trimStart method lets us remove all line break characters from the start of a string.
For instance, we can write:
const trimmed = '\r\nabc'.trimStart()
console.log(trimmed)
Then trimmed is 'abc' .
String.prototype.trimEnd
The trimEnd method lets us remove all line break characters from the end of a string.
For instance, we can write:
const trimmed = 'abc\r\n'.trimEnd()
console.log(trimmed)
Then trimmed is 'abc' .
