Line Chart

Line Chart - 图1

Randomize Add Dataset Add Data Remove Dataset Remove Data

config setup actions

  1. const config = {
  2. type: 'line',
  3. data: data,
  4. options: {
  5. responsive: true,
  6. plugins: {
  7. legend: {
  8. position: 'top',
  9. },
  10. title: {
  11. display: true,
  12. text: 'Chart.js Line Chart'
  13. }
  14. }
  15. },
  16. };
  1. const DATA_COUNT = 7;
  2. const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100};
  3. const labels = Utils.months({count: 7});
  4. const data = {
  5. labels: labels,
  6. datasets: [
  7. {
  8. label: 'Dataset 1',
  9. data: Utils.numbers(NUMBER_CFG),
  10. borderColor: Utils.CHART_COLORS.red,
  11. backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
  12. },
  13. {
  14. label: 'Dataset 2',
  15. data: Utils.numbers(NUMBER_CFG),
  16. borderColor: Utils.CHART_COLORS.blue,
  17. backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
  18. }
  19. ]
  20. };
  1. const actions = [
  2. {
  3. name: 'Randomize',
  4. handler(chart) {
  5. chart.data.datasets.forEach(dataset => {
  6. dataset.data = Utils.numbers({count: chart.data.labels.length, min: -100, max: 100});
  7. });
  8. chart.update();
  9. }
  10. },
  11. {
  12. name: 'Add Dataset',
  13. handler(chart) {
  14. const data = chart.data;
  15. const dsColor = Utils.namedColor(chart.data.datasets.length);
  16. const newDataset = {
  17. label: 'Dataset ' + (data.datasets.length + 1),
  18. backgroundColor: Utils.transparentize(dsColor, 0.5),
  19. borderColor: dsColor,
  20. data: Utils.numbers({count: data.labels.length, min: -100, max: 100}),
  21. };
  22. chart.data.datasets.push(newDataset);
  23. chart.update();
  24. }
  25. },
  26. {
  27. name: 'Add Data',
  28. handler(chart) {
  29. const data = chart.data;
  30. if (data.datasets.length > 0) {
  31. data.labels = Utils.months({count: data.labels.length + 1});
  32. for (var index = 0; index < data.datasets.length; ++index) {
  33. data.datasets[index].data.push(Utils.rand(-100, 100));
  34. }
  35. chart.update();
  36. }
  37. }
  38. },
  39. {
  40. name: 'Remove Dataset',
  41. handler(chart) {
  42. chart.data.datasets.pop();
  43. chart.update();
  44. }
  45. },
  46. {
  47. name: 'Remove Data',
  48. handler(chart) {
  49. chart.data.labels.splice(-1, 1); // remove the label first
  50. chart.data.datasets.forEach(dataset => {
  51. dataset.data.pop();
  52. });
  53. chart.update();
  54. }
  55. }
  56. ];