JavaScript : substring vs. substr

 

String.substring(start-index,stop-index)

•  start-index: (Required - Numeric Value) - where to start the extraction
•  stop-index : (Optional - Numeric Value) - where to stop the extraction

    var str = "Hello World";
    document.write(str.substring(4,8));

 

 

 

String.substr(start-index,length)

•  start-index: (Required - Numeric Value) - where to start the extraction
•  length : (Optional - Numeric Value) - how many characters to extract

    var str = "Hello World";
    document.write(str.substr(4,4));

  

 

Since JavaScript substr() is not cross-browser, I never use it.

 

 

–end–