substring w3schools code example
Example 1: javascript get first 10 characters of string
var str = "Hello world That is reallly neat!";
var res = str.substring(0, 5);//get first 5 chars
Example 2: substring javascript
var str = "Hello world!";
var res = str.substring(1, 4); //ell
Example 3: javascript substring
// zero-based index, 'end' is excluded from result
myString.substring( start, end )