Can't get bindto to bind

[DigitalWheelie]

Bringing in a number of charts into a SPA, but can't get them to bind to the container.

In an external js data file I specify the binding like this, for chart42Data:
bindto: document.getElementById('chart42Graph')

I import the data, and initialize the data:
this.handler.$emit('init', this.chart42Data)

Hoping it ends up in this container, but it doesn't:
<vue-c3 :handler="handler" id="chart42Graph"></vue-c3>

Instead, the last item I initialize attaches to all vue-c3 containers.

What am I missing?

[DigitalWheelie]

Also, when trying to build my application, I get this error:
ERROR in build.js from UglifyJs Unexpected token: punc (() [./node_modules/vue-c3/dist/vue-c3.umd.js:26,0][build.js:29893,11]

Any suggestions?

[biering]

I'll look into it.

[DigitalWheelie]

So sorry, I forgot to update this, but the UglifyJS error was unrelated.
Also, for various reasons I switched to Billboards so I'm good now.