Mermaid graph with no parameters defined in hugo config results in 'Uncaught TypeError'

[chulcher]

docsy/layouts/partials/scripts/mermaid.html

Line 21 in a72c57c

var params = {{ .Site.Params.mermaid | jsonify | safeJS }};

If nothing is defined in hugo.toml for [params.mermaid] then the referenced code results in var params = null being generated.

docsy/layouts/partials/scripts/mermaid.html

Line 29 in a72c57c

if (defaultConfig.hasOwnProperty(key) && params.hasOwnProperty(keyLower)) {

Then when attempting the if statement a call is made against a null value, resulting in the browser console error.

Uncaught TypeError: Cannot read properties of null (reading 'hasOwnProperty')

[chulcher]

The error in the script results in per-diagram theme settings breaking and no diagram being generated. An empty set of parameters in hugo.toml (i.e., simply adding [params.mermaid] with no further parameters) assigns an empty set to params and allows successful execution of the script.

[chalin]

@deining - could you take a look?

[deining]

@deining - could you take a look?

Sure. PR 1885 fixes this issue.