John Wealthall

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icon location Berkhamsted, Hertfordshire, United Kingdom icon location I'm a developer who is experienced in creating robust, maintainable solutions and getting them delivered to clients. With 40 years of experience in every level.

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Trendline for second Y axis

The beforeDraw function can be modified to select the yAxis for the dataset by changing the forEach function to ` chartInstance.data.datasets.forEach(function (dataset, index) { if (dataset.trendlineLinear && chartInstance.isDatasetVisible(index)) { var...