EDIT: As others have pointed out, use slice(-5) instead of substr. However, see the .split().pop() solution at the bottom of this answer for another approach.
Original answer:
You'll want to use the Javascript string method .substr() combined with the .length property.
var id = "ctl03_Tabs1";
var lastFive = id.substr(id.length - 5); // => "Tabs1"
var lastChar = id.substr(id.length - 1); // => "1"
This gets the characters starting at id.length - 5 and, since the second argument for .substr() is omitted, continues to the end of the string.
You can also use the .slice() method as others have pointed out below.
If you're simply looking to find the characters after the underscore, you could use this:
var tabId = id.split("_").pop(); // => "Tabs1"
This splits the string into an array on the underscore and then "pops" the last element off the array (which is the string you want).
Answer from Jamon Holmgren on Stack OverflowEDIT: As others have pointed out, use slice(-5) instead of substr. However, see the .split().pop() solution at the bottom of this answer for another approach.
Original answer:
You'll want to use the Javascript string method .substr() combined with the .length property.
var id = "ctl03_Tabs1";
var lastFive = id.substr(id.length - 5); // => "Tabs1"
var lastChar = id.substr(id.length - 1); // => "1"
This gets the characters starting at id.length - 5 and, since the second argument for .substr() is omitted, continues to the end of the string.
You can also use the .slice() method as others have pointed out below.
If you're simply looking to find the characters after the underscore, you could use this:
var tabId = id.split("_").pop(); // => "Tabs1"
This splits the string into an array on the underscore and then "pops" the last element off the array (which is the string you want).
Don't use the deprecated .substr()!
Use either the .slice() method because it is cross browser compatible (see issue with IE).
Or use the .substring() method.
The are slight differences in requirements, which are properly documented on: String.prototype.substring()
const id = "ctl03_Tabs1";
console.log(id.slice(-5)); //Outputs: Tabs1
console.log(id.slice(-1)); //Outputs: 1
// below is slower
console.log(id.substring(id.length - 5)); //Outputs: Tabs1
console.log(id.substring(id.length - 1)); //Outputs: 1javascript - access the last three Characters of the value in Jquery - Stack Overflow
Bracket Notation to find the last character in a string
javascript - How can I get the last character in a string? - Stack Overflow
how to get what index position the last character of a string is
The String .slice() method lets you use a negative index:
var str = "319CDXB".slice( -3 ); // DXB
EDIT: To expound a bit, the .slice() method for String is a method that behaves very much like its Array counterpart.
The first parameter represents the starting index, while the second is the index representing the stopping point.
Either parameter allows a negative index to be employed, as long as the range makes sense. Omitting the second parameter implies the end of the String.
Example: http://jsfiddle.net/patrick_dw/N4Z93/
var str = "abcdefg";
str.slice(0); // "abcdefg"
str.slice(2); // "cdefg"
str.slice(2,-2); // "cde"
str.slice(-2); // "fg"
str.slice(-5,-2); // "cde"
The other nice thing about .slice() is that it is widely supported in all major browsers. These two reasons make it (in my opinion) the most appealing option for obtaining a section of a String.
You can do this with regular JavaScript:
var str = "319CDXB";
var lastThree = str.substr(str.length - 3);
If you're getting it from jQuery via .val(), just use that as your str in the above code.
Since in Javascript a string is a char array, you can access the last character by the length of the string.
var lastChar = myString[myString.length -1];
It does it:
myString.substr(-1);
This returns a substring of myString starting at one character from the end: the last character.
This also works:
myString.charAt(myString.length-1);
And this too:
myString.slice(-1);