How do I set the attributes of a WebGL context after it has been created?

问题

I know that we can specify attributes for a WebGL context when we create the context:

var ctx = myCanvas.getContext(‘webgl’, attributes);

Is there a method that we can call to set the attributes of ctx after ctx has been created? For instance, can we do something akin to

var ctx = myCanvas.getContext(‘webgl’);
ctx.setAttributes(attributes);

回答1:

That would require being able to change the attributes of a context. Which you're not allowed to do. They're fixed at context creation time.

回答2:

here it is:context.getContextAttributes()

来源：https://stackoverflow.com/questions/17153833/how-do-i-set-the-attributes-of-a-webgl-context-after-it-has-been-created