How to apply callback function from markdown?

[selvavm]

Hi,

I am new to mermaid. I wanted to apply a callback function on load of a diagram. I tried below command but it didnt work (although theme changed).

%%{init: { 'theme':'dark', 'mermaid': {'callback': 'test'} } }%%

function test() {
   alert('Triggered')
}

Note: I am using mkdocs-materials, so I have the capability to only add new javascript but not override (so, not able to override the initialization of mermaid).