递归父函数调用者

Posted 2021-02-23

This snippet allows to know the parent function caller name of any level from the calling function.

<SCRIPT LANGUAGE="javascript" TYPE="text/javascript">
Function.prototype.myname = function() { return this.toString().substr( 0, this.toString().indexOf( "(" ) ).replace( "function ", "" ) ; }
Function.prototype.callername = function( _level )
{
     // level 0 is this functon
     _level = parseInt( _level, 10 );      if ( isNaN( _level ) || _level < 0 ) _level = 0 ;
     var _eval_str = "arguments.callee" ;
     for( var _l = 0 ; _l <= _level ; _l++ ) _eval_str += ".caller" ;
 
     _eval_str += ".myname();" ;
     return eval( _eval_str ) ;
}
 
function _child_caller()
{
    document.write( "This function is " + arguments.callee.callername(0) ) ;
    document.write( "<br>" );
    document.write( "Parent function is " + arguments.callee.callername(1) ) ;
    document.write( "<br>" );
    document.write( "Grand Parent function is " + arguments.callee.callername(2) ) ;
}
 
function _parent_caller()
{
    _child_caller() ;
}
 
function _grand_parent_caller()
{
    _parent_caller() ;
}
 
_grand_parent_caller();
</SCRIPT>