JavaScript functions passed as string won't execute

[jdefrance-stessa]

Hi Everyone!
In this very example, trying to format y axes as well as tooltip values with currency format.
Ultimately, I also want to use JavaScript to make some of the series clickable.. etc.

As per this gem documentation, this normally is possible:

You can put anything in the options hash that Chart.js recognises. To pass a JavaScript function as an option value, wrap it in quotation marks to make it a string.

In practice, I don't seem to be able to make it work.

<div> <%= bar_chart @chart_data, { responsive: true, legend: { position: "right", }, maintainAspectRatio: false, tooltips: { mode: 'label', intersect: true, callbacks: { title: "function(tooltipItem) { return moment(tooltipItem[0].xLabel).format('ll'); }", label: "function(tooltipItem, data) { return data.datasets[tooltipItem.datasetIndex].label + ': ' + tooltipItem.yLabel; }" } }, scales: { xAxes: [{ stacked: true, }], yAxes: [{ stacked: false, userCallback: "function(value, index, values) { value = value.toString(); value = value.split(/(?=(?:...)*$)/); value = value.join(','); return '$' + value; }" }] }} %> </div>

Is this a know bug/issue?
Should I be doing this differently?

Alternatively, is there any way to access the ctx and chart variables from the generated script, so I can eventually attach these callbacks in raw JS, in the case this gem doesn't allow it?

Thanks in advance!