how to using jCanvas for dynamic data

how to using jCanvas for dynamic data

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some time has many data like this
$("canvas")
.drawText({text1..}).drawText({text2..});
.drawLine({ data1..
}).drawLine({data2..}).drawLine({data3..}).drawLine({data3..});
or
$("canvas")
.drawText({text1..})
.drawLine({ data1.. });
how to add .drawXXX() to $("canvas") using loop or something for better