The front end draws the flow arrow. Are there any good solutions? Ask for advice

is there a canvas library where the great god has used to draw arrows?
needs to draw arrows with width, and the radians can be adjusted
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use jtopo to make one that can only draw this kind of ugly arrows, and the radians cannot be adjusted

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clipboard.png

clipboard.png

Oct.26,2021

svg, one path, one polygon

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Message : Disk full (/tmp/#sql-temptable-64f5-1ea5dee-1d8d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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