Use `document` when `getRootNode` is unsupported (#6630)
Use `document` when `getRootNode` is unsupported (#6630)


touletan/Chart.js,nnnick/Chart.js,touletan/Chart.js,touletan/Chart.js,chartjs/Chart.js,chartjs/Chart.js,chartjs/Chart.js,chartjs/Chart.js,touletan/Chart.js