JavaScript去除字符串末尾标点及删除末字符的多种实现

stringObject.slice(start,end)

var str = 'Hello World!';
document.write(str.slice(0,str.length-1)); //输出 Hello World

stringObject.substr(start,length)

var str = 'Hello World!';
document.write(str.substr(0,str.length-1)); //输出 Hello World

stringObject.substring(start,stop)

var str = 'Hello World!';
document.write(str.substring(0,str.length)); //输出 Hello World

<script type="text/javascript">

	// 将字符串作为变量
	var string = "abcdefghijklmn"; 
	a = string.substring(0, 4) 
	b = string.substring(1, 6) 
	c = string.substring(5) 
	d = string.substring(0) 

	// 输出新的字符串
	// 给定字符串的一部分
	document.write(a + "<br>"); 
	document.write(b + "<br>"); 
	document.write(c + "<br>"); 
	document.write(d + "<br>"); 					 
</script>

function trim(str){ //删除左右两端的空格
  return str.replace(/(^\s*)|(\s*$)/g, "");
 }
 function ltrim(str){ //删除左边的空格
 return str.replace(/(^\s*)/g,"");
 }
 function rtrim(str){ //删除右边的空格
  return str.replace(/(\s*$)/g,"");
 }

s=s.TrimEnd(',')
//如果要删除"5,"，则需要这么写
char[]MyChar={'5',','};
s=s.TrimEnd(MyChar);
//s="1,2,3,4"

string.TrimEnd().Remove(string.Length - 2, 1)
string.Remove()