Question

Which method must clear the pixels in the specified rectangle that also intersects the current clipping region to a fully transparent black, erasing any previous image?

(a) strokeRect(x, y, w, h)

(b) clearRect(x, y, w, h)

(c) fillRect(x, y, w, h)

(d) removeRect(x,y,w,h)

I have been asked this question in final exam.

The query is from Client-Side Graphics with Canvas in portion HTML Markup, Forms, Video, Audio & Other Multimedia of HTML

Answer 1

Correct option is (b) clearRect(x, y, w, h)

To explain: StrokeRect(x, y, w, h) draws rectangle without filling it. The clearRect() method clears the specified pixels within a given rectangle. FillRect(x, y, w, h) method draws filled rectangle.