How to solve "cannot call method ... to undefined" in google closure (creating simple toolbar)?
google-closure
Solution
There may be other problems, but the error is because you need the new keyword so the line should look like this:
var tb = new goog.ui.Toolbar();
Problem
below is a complete HTML source for building a simple toolbar with google closure. Gives an error message in Chrome: `Uncaught TypeError: Cannot call method 'addChild' of undefined` at the spot marked with `// ERROR` comment. Could anyone suggest a tip fixing this? Thanks!!! edit: that's right, missed new, but another error was that I should have used `render()` instead of `decorate()`, because `decorate()` requires all dom elements in place (and I don't have placeholders for the buttons defined), while `render()` creates new ones. ``` <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html lang="en-US" xml:lang="en-US" xmlns="http://www.w3.org/1999/xhtml"> <head> <script type="text/javascript" src="/m/google-closure/closure/goog/base.js"></script> <script type="text/javascript"> goog.require('goog.dom'); goog.require('goog.ui.Toolbar'); goog.require('goog.ui.ToolbarButton'); </script> <script type="text/javascript"> var load_sketcher = function(){ var tb = goog.ui.Toolbar(); tb.addChild(new goog.ui.ToolbarButton('A'), true);// ERROR!!! tb.addChild(new goog.ui.ToolbarButton('B'), true); tb.decorate(goog.dom.getElement('sk_toolbar'));// should have used render() here }; </script> </head> <body onload='load_sketcher();'> <div id="sketcher"> <div id="sk_toolbar"></div> <div id="sk_canvas"></div> </div> </body> </html> ```