Keep only first n characters in a string?

Question

Is there a way in JavaScript to remove the end of a string?

I need to only keep the first 8 characters of a string and remove the rest.

Answer 1

Use the string.substring(from, to) API. In your case, use string.substring(0,8).

Answer 2

You could use String.slice:

var str = '12345678value';
var strshortened = str.slice(0,8);
alert(strshortened); //=> '12345678'

Using this, a String extension could be:

String.prototype.truncate = String.prototype.truncate ||
  function (n){
    return this.slice(0,n);
  };
var str = '12345678value';
alert(str.truncate(8)); //=> '12345678'

See also

Answer 3

You can use .substring, which returns a potion of a string:

"abcdefghijklmnopq".substring(0, 8) === "abcdefgh"; // portion from index 0 to 8

Answer 4

var myString = "Hello, how are you?";
myString.slice(0,8);

Answer 5

You could try:

myString.substring(0, 8);

Answer 6

You are looking for JavaScript's String method substring

e.g.

'Hiya how are you'.substring(0,8);

Which returns the string starting at the first character and finishing before the 9th character - i.e. 'Hiya how'.

substring documentation