How to set JS Object Parameter whilst returning the JS Object

Question

I want to create an JavaScript Image object and set the src property. I tried:

(set! (.-src (js/Image. 80 80)) "foo.png")

But the return value of this will be "foo.png".

How do I set the src property and return the #<[object HTMLImageElement]>?

Ultimately I want to create a sequence of images with the sources "1.png", "2.png"... so was hoping the following would work:

(map (fn [x] (aset (js/Image. 80 80) "src" (str x ".png"))) (range 0 11))

Be advised, though, that map is lazy, so you might not get what you expect. You may want to go with doseq, instead. — 0rca
– 0rca, Commented May 13, 2014 at 7:15

tangrammer · Accepted Answer · 2014-05-12 10:19:36Z

3

(let [the-image (js/Image. 80 80)]
   (set! (.-src the-image) "foo.png")
   the-image ;;=> the full image is here with the src = foo.png
)

answered May 12, 2014 at 10:19

tangrammer

3,06121 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1