Keep only first n characters in a string?
JavascriptJavascript Problem Overview
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.
Javascript Solutions
Solution 1 - Javascript
const result = 'Hiya how are you'.substring(0,8); console.log(result); console.log(result.length);
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'.
Solution 2 - Javascript
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'
Solution 3 - Javascript
Use substring function
Check this out http://jsfiddle.net/kuc5as83/
var string = "1234567890"
var substr=string.substr(-8);
document.write(substr);
Output >> 34567890
substr(-8)
will keep last 8 chars
var substr=string.substr(8);
document.write(substr);
Output >> 90
substr(8)
will keep last 2 chars
var substr=string.substr(0, 8);
document.write(substr);
Output >> 12345678
substr(0, 8)
will keep first 8 chars
Check this out string.substr(start,length)
Solution 4 - Javascript
var myString = "Hello, how are you?";
myString.slice(0,8);
Solution 5 - Javascript
You could try:
myString.substring(0, 8);
Solution 6 - Javascript
Use the string.substring(from, to)
API. In your case, use string.substring(0,8).
Solution 7 - Javascript
You can use .substring
, which returns a potion of a string:
"abcdefghijklmnopq".substring(0, 8) === "abcdefgh"; // portion from index 0 to 8