Optional
chars?: StringExpression<string>The character(s) to trim from the beginning of the input.
The argument can be any valid expression that resolves to a string. The $trim operator breaks down the string into individual UTF code point to trim from input.
If unspecified, $trim removes whitespace characters, including the null character. For the list of whitespace characters, see Whitespace Characters.
The string to trim. The argument can be any valid expression that resolves to a string. For more information on expressions, see Expressions.
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Removes whitespace or the specified characters from the beginning and end of a string.