Broken when upgrade chart.js from 2.9.3 to 2.9.4

[BangNguyen1992]

Expected Behavior

Actual Behavior

After I upgrade chart.js to 2.9.4, some configs in the tick option don't work anymore, it seems to get overwritten by chartjs options

For example:

ticks: {
    callback: (value, index, values) => `£ ${value}`,
},

return the value only, it doesnt include the £.

Environment

• vue.js version: 2.6.12
• vue-chart.js version: 3.5.1
• chart.js version: 2.9.4
• npm version: 6.12.1

[apertureless]

Well the options get just passed to chart.js
Have you checked if the callback maybe changed in that chart.js version?

Not much I can do here.

[simonbrunel]

@apertureless FYI, I just found out that chartjs/Chart.js#7918 introduced a breaking change for reactive chart config or config containing reactive objects. Once merged, reactive objects are not anymore enumerable thus can't be iterated (Object.keys() returning an empty array). This can break some Vue.js integrations, such as the datalabels plugin Vuepress docs.