2.1.102 [HTML5] Section 4.11.4 The canvas element

V0217: The toBlob function is not supported

The specification states:

 4.11.4 The canvas element
     ...
     void toBlob(FileCallback? _callback, optional DOMString type, any... arguments);
 };

IE11 Mode, IE10 Mode, IE9 Mode, IE8 Mode, IE7 Mode, and IE5 (Quirks) Mode (All versions)

The toBlob function is not supported.

V0218: The null character \0 is not properly handled by the getContext function

The specification states:

 4.11.4 The canvas element
     ...
     The getContext(contextId, arguments...) method of the canvas element, when invoked, 
     must run the steps in the cell of the following table whose column header describes 
     the canvas element's canvas context mode and whose row header describes the method's 
     first argument.

IE11 Mode, IE10 Mode, IE9 Mode, IE8 Mode, IE7 Mode, and IE5 (Quirks) Mode (All versions)

The null character \0 is not properly handled by the getContext function.

V0219: The width and height content attribute values truncate the content and do not return the value for getAttribute

The specification states:

 ... The canvas element
     ...
     Whenever the width and height content attributes are set, removed, changed, or 
     redundantly set to the value they already have, if the canvas context mode is ... 2d, 
     the user agent must set bitmap dimensions to the numeric values of the width and 
     height content attributes.
  
     The width and height IDL attributes must reflect the respective content attributes of 
     the same name, with the same defaults.

All document modes (All versions)

The width and height content attribute values truncate the content and do not return the value for getAttribute.

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