JavaScript: Truncate a string up to a specified length

JavaScript fundamental (ES6 Syntax): Exercise-117 with Solution

Write a JavaScript program to truncate a string up to a specified length.

Note: Determine if the string's length is greater than num. Return the string truncated to the desired length, with '...' appended to the end or the original string.

• Determine if String.prototype.length is greater than num.
• Return the string truncated to the desired length, with '...' appended to the end or the original string.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
const truncateString = (str, num) =>
  str.length > num ? str.slice(0, num > 3 ? num - 3 : num) + '...' : str;

console.log(truncateString('boomerang', 7));

Sample Output:

boom...

Pictorial Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-117-1 by w3resource (@w3resource) on CodePen.

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