helpers.merge is not a function

[Techn1x]

Getting the following error when loading up my charts;

ember-metal.js:3988 TypeError: helpers.merge is not a function
    at configure (chartjs-plugin-datalabels.js:573)
    at Object.afterDatasetUpdate (chartjs-plugin-datalabels.js:581)
    at Object.notify (Chart.js:6937)
    at Chart.updateDataset (Chart.js:4165)
    at Chart.updateDatasets (Chart.js:4140)
    at Chart.update (Chart.js:4087)
    at Chart.construct (Chart.js:3844)
    at new Chart (Chart.js:6340)
    at Class.didInsertElement (ember-chart.js:18)
    at Class.superWrapper [as didInsertElement] (ember-utils.js:423)

This occurs on the following line;
https://github.com/chartjs/chartjs-plugin-datalabels/blob/master/src/plugin.js#L304

I am using Chart.js 2.7.0

When I step through the code, I can see that helpers is defined, and has lots of helper functions, but is missing merge. It does however have configMerge and scaleMerge which I believe are more specific use cases of the merge function. Should merge perhaps be configMerge??

Looking at the other variables on the line, config == {}, options == (default option object), override == undefined.

[Techn1x]

In case it helps, here's my options

options: {
	maintainAspectRatio: false,	// Set to false for responsive height..... (it's weird)
	responsive: true,
	
	cutoutPercentage: 50,	// Makes this a doughnut graph
	rotation:0.7 * Math.PI,
	circumference:1.6 * Math.PI,
	legend: {
		display: true,
		position: 'bottom'
	},
	plugins: {
		datalabels: {
			backgroundColor: 'black',
			borderColor: 'white',
			borderRadius: 25,
			borderWidth: 2,
			display: true,
			color: 'white',
			font: {
				weight: 'bold'
			},
			anchor: 'start'
		}
	}
}

[simonbrunel]

@Techn1x it's definitely helpers.merge that needs to be used, which is in 2.7.0 and actually works in the examples. When reading your stacktrace, it seems that your are still using 2.6.0 because Object.notify (Chart.js:6937) is 2.6, not 2.7.

Maybe a cache / environment issue?

[Techn1x]

Thanks, that is good to know and might explain a separate issue I'm having... I'll get back to you when I figure out what's going on.

[Techn1x]

Yep, turns out npm & node_modules was lying to me! Despite all of the evidence saying 2.7.0, my website was using chart.js 2.6.0. Wasn't a caching issue, ended up being a chartjs plugin that was importing chartjs in a way that npm didn't recognise

Datalabels are now appearing, with no errors, thanks!