How to trim a string to N chars in Javascript?

Question

How can I, using Javascript, make a function that will trim string passed as argument, to a specified length, also passed as argument. For example:

var strin         


        

Answer 1

    let trimString = function (string, length) {
      return string.length > length ? 
             string.substring(0, length) + '...' :
             string;
    };

Use Case,

let string = 'How to trim a string to N chars in Javascript';

trimString(string, 20);

//How to trim a string...