Sys.StringBuilder isEmpty Method
Determines whether the Sys.StringBuilder object has content.
var stringBuilderVar = new Sys.StringBuilder();
var isEmptyVar = stringBuilderVar.isEmpty();
Returns
true if the StringBuilder instance contains no elements; otherwise, false.
Remarks
Use the isEmpty method to determine whether a StringBuilder instance has any content. If you append an empty string, null, or an undefined value to an empty StringBuilder instance, the instance remains empty and unchanged.