Nodejs String Truncate truncate(n)

Method Source Code

String.prototype.truncate = function(n) {
  var tooLong = this.length > n,
      string = tooLong ? this.substr(0,n-1) : this;
  string = tooLong ? string.substr(0,string.lastIndexOf(' ')) : string;
  return  tooLong ? string + '...' : string;
};

Related

1. truncate(length, truncation)

   String.prototype.truncate = function(length, truncation) {
       length = length || 30;
       truncation = (typeof truncation == 'undefined') ? '…' : truncation;
       return this.length > length
           ? this.slice(0, length) + truncation
           : this;
   };
   

2. truncate(length, useWordBoundary)

   String.prototype.truncate = function(length, useWordBoundary) {
       var toLong = this.length > length,
       s_ = toLong ? this.substr(0, length - 1) : this;
       s_ = useWordBoundary && toLong ? s_.substr(0, s_.lastIndexOf(' ')) : s_;
       return toLong ? s_ + '…' : s_;
   };
   

3. truncate(max_len, appender)

   'use strict';
   String.prototype.truncate = function(max_len, appender) {
     max_len  = max_len || 80;
     appender = appender || '...';
     if (appender.length >= max_len) {
       throw Error('appender length is greater or equal to max_len');
     if (this.length <= max_len) {
       return this;
   ...
   

4. truncate(maxlength)

   String.prototype.truncate = function (maxlength) {
       if (!this) {
           return '';
       if (!maxlength) {
           maxlength = 20;
       return (this.length > maxlength) ? this.slice(0, maxlength - 3) + '...' : this;
   };
   ...
   

5. truncate(n)

   String.prototype.truncate = function(n){
         return this.substr(0,n-1)+(this.length>n?'...':'');
   };
   

6. truncate(options)

   String.prototype.truncate = function (options) {
     var length = (options && options.length) || 50;
     var ending = (options && options.ending) || "...";
     var truncated = this.slice(0, length);
     if (truncated.length < this.length)
       truncated += ending;
     return truncated;
   };
   

7. truncate(options)

   String.prototype.truncate = function (options) {
     var length = (options && options.length) || 70;
     var ending = (options && options.ending) || "...";
     var truncated = this.slice(0, length);
     if (truncated.length < this.length)
       truncated += ending;
     return truncated;
   };
   

8. truncate(x)

   String.prototype.truncate = function(x){
     return this.length > x ? this.substr(0,x) : this ;
   

9. truncate(x)

   String.prototype.truncate = function(x){
     if(this.length < x) return this.valueOf();
     else return this.substring(0, x - 3) + "...";
   };