Función Trim() en JavaScript

function trim(inputString) {

   // Removes leading and trailing spaces from the passed string. Also removes

   // consecutive spaces and replaces it with one space. If something besides

   // a string is passed in (null, custom object, etc.) then return the input.

   if (typeof inputString != "string") { return inputString; }

   var retValue = inputString;

   var ch = retValue.substring(0, 1);

   while (ch == " ") { // Check for spaces at the beginning of the string

      retValue = retValue.substring(1, retValue.length);

      ch = retValue.substring(0, 1);


   ch = retValue.substring(retValue.length-1, retValue.length);

   while (ch == " ") { // Check for spaces at the end of the string

      retValue = retValue.substring(0, retValue.length-1);

      ch = retValue.substring(retValue.length-1, retValue.length);


   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string – look for multiple spaces within the string

      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings


   return retValue; // Return the trimmed string back to the user

} //




About omaracostacasas

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