Legend text is a textual description of what is represented by each of the dataPoints. The name of dataPoint is taken as a default value, which could be overwritten by custom text by setting this property.
legendText can also contain keywords inside the string. Keywords are property names mentioned inside curly braces like “{name}”, “{x}: {y}”, etc. legendText can either be string or keywords. keywords are property names mentioned inside curly braces.
var chart = new CanvasJS.Chart("container",
{
.
.
data:[ {
dataPoints: [
{x: 10 , y: 50 , legendText: "Apple" },
],
},
]
.
.
});
chart.render();
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There is a typo : “{ y: 8, name: “Grapes”, legnedText: “grapes” },”
Should be legendText