How to show less content lines using jsom in sharepoint

Question

In need to develope page like below

[1]: https://i.stack.imgur.com/HpOnU.png`enter code here`if(theString.length>100){ theString = theString.substr(0,100)+'...'; }

Ganesh Sanap · Answer

You can use the code like below to truncate the string variable:

function truncate(input, noOfChar) {
   if (input.length > noOfChar) {
      return input.substring(0, noOfChar) + '...';
   }
   return input;
};

Usage:

theString = truncate(theString, 100);