{"id":808,"date":"2021-12-20T23:00:30","date_gmt":"2021-12-20T14:00:30","guid":{"rendered":"https:\/\/blog.wsd.sh\/?p=808"},"modified":"2021-12-23T08:08:51","modified_gmt":"2021-12-22T23:08:51","slug":"uncaught-typeerror-this-mem-chart-getelementatevent-is-not-a-function","status":"publish","type":"post","link":"https:\/\/blog.wsd.sh\/?p=808","title":{"rendered":"<small>Uncaught TypeError: this.chart.getElementAtEvent is not a function<\/small>"},"content":{"rendered":"<p>chart.js\u306ePublic API\u306e getElementAtEvent \u306f getElementsAtEventForMode \u306b\u5909\u66f4\u3055\u308c\u3066\u3044\u308b<\/p>\n<p><small>getElementAtEvent is replaced with chart.getElementsAtEventForMode(e, &#8216;nearest&#8217;, { intersect: true }, true)<\/small><\/p>\n<pre>\r\nfunction evt_handleChartClick(evt) {\r\n   const points = myChart.getElementsAtEventForMode(evt, 'nearest', { intersect: true }, true);\r\n   if (points.length) {\r\n      const firstPoint = points[0];\r\n      var label = myChart.data.labels[firstPoint.index];\r\n      var value = myChart.data.datasets[firstPoint.datasetIndex].data[firstPoint.index];\r\n      console.log(label +\":\"+value+\":\"+firstPoint.datasetIndex+\":\"+firstPoint.index);\r\n   }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>chart.js\u306ePublic API\u306e getElementAtEvent \u306f getElementsAtEventForMode \u306b\u5909\u66f4\u3055\u308c\u3066\u3044\u308b getElementAtEvent is replaced with&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/808"}],"collection":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=808"}],"version-history":[{"count":7,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/808\/revisions"}],"predecessor-version":[{"id":810,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=\/wp\/v2\/posts\/808\/revisions\/810"}],"wp:attachment":[{"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.wsd.sh\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}