use-resize-observer | A React hook that allows you to use a ResizeObserver to measure an element's size | Frontend Utils library
kandi X-RAY | use-resize-observer Summary
kandi X-RAY | use-resize-observer Summary
A React hook that allows you to use a ResizeObserver to measure an element's size.
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QUESTION
I'm new to react and d3 and I'm trying to implement a simple SVG map with D3 v6.2 and ReactJS, which will indicate the location of some cities. Each city is being indicated by circles as shown below:
I need to change this marking to put a pin with the name of the city (using a div if possible) as shown in this image:
But the point's symbol shape is determined by D3-path itself and I can't find anything that can change or replace with another markup.
Note: I tried to put a div
within the path
tags of the points, but I realized that they were not rendered and the only change I was able to make was to change the radius of the mark with pointRadius ()
but I don't want to do that.
Code:
...ANSWER
Answered 2020-Nov-26 at 19:43There are a number of options, the simplest is likely just using SVG paths to draw your pin shapes.
The path generator will not help us here. Instead we'll use the projection directly, projection([longitude,latitude])
will return [x,y]
in pixels. This projected x,y coordinate will let us anchor our marker to the correct location on the map. The geojson you are using conveniently has a property containing the longitude and latitude. Below I just use a simple non-geojson array for simplicity.
Below I plot each city as a g
element with an appropriate translate, which allows me to then place text, path, and circle elements relative to the city:
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