Javascript 从文本区域中删除最后一个“\n”
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Remove the last "\n" from a textarea
提问by randomwebdev
How to remove the last"\n" from a textarea?
如何从文本区域中删除最后一个“\n”？
回答by aarti
Only remove the last newline characters (\n):
只删除最后一个换行符 ( \n)：
verses1 = "1\n222\n"
verses1.replace(/\n$/, "")
// "1\n222"
verses2 = "1\n222\n\n"
verses2.replace(/\n$/, "")
// "1\n222\n"
Only all the last newlines (\n):
只有所有最后的换行符 ( \n)：
verses = "1\n222\n\n"
verses.replace(/\n+$/, "")
// "1\n222"
回答by John Boker
from http://en.wikipedia.org/wiki/Trim_%28programming%29
来自http://en.wikipedia.org/wiki/Trim_%28programming%29
String.prototype.trim = function() {
return this.replace(/^\s+|\s+$/g, "");
};
That will add a trim function to string variables that will remove whitespace from the beginning and end of a string.
这将向字符串变量添加一个修剪函数，该函数将从字符串的开头和结尾删除空格。
With this you can do stuff like:
有了这个，你可以做这样的事情：
var mystr = "this is my string "; // including newlines
mystr = mystr.trim();
回答by Ben Taliadoros
回答by creftos
I personally like lodash for trimming newlines from strings. https://lodash.com/
我个人喜欢 lodash 从字符串中修剪换行符。https://lodash.com/
_.trim(myString);
