Patching script tags

[JobJob]

I'm doing some crude interfacing with some js code (in IJulia for now). I've had cause to do something like this:

using Patchwork, Interact
@manipulate for curval in 0:0.1:10
    Elem(:div, [
        #other stuff...,
        Elem(:script, "var best_global_evarrr = $curval"),
        Elem(:script, "//ongoing process that uses best_global_evarrr")
    ])
end

When you move the slider, the text (code) of the first <script> gets patched, but the code doesn't get run. Seems that the whole <script> element actually needs to be removed and re-added, rather than just the text being modified in order for the browser to run it.

This change to diff.jl makes it work (only tested in chrome), but I don't know if it's the right solution.

@@ -98,7 +98,16 @@ function diff!{ns, tag}(a::Elem{ns, tag}, b::Elem{ns, tag}, index, patches)
         patch = push!(patch, DictDiff(proppatch))
     end

-    diff!(a.children, b.children, index, patches, parentpatch=patch)
+    if tag == :script
+        scriptpatch = Dict()
+        diff!(a.children, b.children, 0, scriptpatch)
+        if !isempty(scriptpatch)
+            return patches[index] = Overwrite(b)
+        end
+    else
+        diff!(a.children, b.children, index, patches, parentpatch=patch)
+    end
+
     if !isempty(patch)
         patches[index] = patch
     end

[shashi]

Interesting, it's probably better to use HTML("<script>...</script>") here instead of Patchwork.