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theFunction.toString()

Returns

A string representing the function object.

Description

The toString( ) method returns a string describing theFunction. By default, all functions return the string "[type Function]". Checking the return value of toString( ) can be useful during debugging, as it distinguishes function objects from other objects. The instanceof and typeof operators can also be used to determine the datatype of a Function object. For example:

function moveClipTo (newX, newY) {
  this._x = newX;
  this._y = newY;
}
trace(moveClipTo.toString());           // Displays: [type Function]
trace(typeof moveClipTo);               // Displays: function
trace(moveClipTo instanceof Function);  // Displays: true

To provide a more descriptive return value for toString( ), you can override the toString( ) method for the function:

moveClipTo.toString = function () {
  return "moveClipTo function";
};
   
trace(moveClipTo.toString());  // Displays: moveClipTo function

See Also

instanceof, Object.toString( ), typeof

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