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Server side SVG rendering of ECharts
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const echarts = require("echarts"); | |
const Canvas = require('canvas'); | |
const {JSDOM} = require('jsdom'); | |
const fs = require('fs'); | |
echarts.setCanvasCreator(() => { | |
return new Canvas(100, 100); | |
}); | |
const {window} = new JSDOM(); | |
global.window = window; | |
global.navigator = window.navigator; | |
global.document = window.document; | |
const root = document.createElement('div'); | |
root.style.cssText = 'width: 500px; height: 500px;'; | |
const chart = echarts.init(root, null, { | |
renderer: 'svg' | |
}); | |
chart.setOption({ | |
title: { | |
text: 'ECharts 入门示例' | |
}, | |
tooltip: {}, | |
legend: { | |
data: ['销量'] | |
}, | |
xAxis: { | |
data: ['衬衫', '羊毛衫', '雪纺衫', '裤子', '高跟鞋', '袜子'] | |
}, | |
yAxis: {}, | |
series: [{ | |
animation: false, | |
name: '销量', | |
type: 'bar', | |
data: [5, 20, 36, 10, 10, 20] | |
}] | |
}); | |
fs.writeFileSync('basic.svg', root.querySelector('svg').outerHTML, 'utf-8'); | |
chart.dispose(); |
looks like a great elegant solution, but looks like Canvas doesnt work with arm64 docker
Update: new echarts@5.3.0 has provided a zero dependency SSR solution.
const echarts = require('echarts');
// In SSR mode the first parameter does not need to be passed in as a DOM object
const chart = echarts.init(null, null, {
renderer: 'svg', // must use SVG mode
ssr: true, // enable SSR
width: 400, // need to specify height and width
height: 300
});
// setOption as normal
chart.setOption({
xAxis: {
type: 'category',
data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
},
yAxis: {
type: 'value'
},
series: [
{
data: [120, 200, 150, 80, 70, 110, 130],
type: 'bar'
}
]
});
// Output string
const svgStr = chart.renderToSVGString();
The feature doc:
https://echarts.apache.org/handbook/en/basics/release-note/5-3-0/#server-side-rendering-with-zero-dependencies
Can you add a feature to get image buffers from SVG render like png
, jpeg
?
Can you add a feature to get image buffers from SVG render like
png
,jpeg
?
It'll be really useful to me also!
I get an error message if I use Nodejs:
/echarts.js:123
env.touchEventsSupported = 'ontouchstart' in window && !browser.ie && !browser.edge;
^
ReferenceError: window is not defined
at detect (/home/pi/node_modules/echarts/dist/echarts.js:123:54)
at /home/pi/node_modules/echarts/dist/echarts.js:97:9
at /home/pi/node_modules/echarts/dist/echarts.js:22:68
at Object.<anonymous> (/home/pi/node_modules/echarts/dist/echarts.js:25:2)
at Module._compile (node:internal/modules/cjs/loader:1375:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1434:10)
at Module.load (node:internal/modules/cjs/loader:1206:32)
at Module._load (node:internal/modules/cjs/loader:1022:12)
at Module.require (node:internal/modules/cjs/loader:1234:19)
at require (node:internal/modules/helpers:176:18)
Node.js v21.5.0
See also apache/echarts#19670
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Can I get a tooltip in rendering on the Server side SVG rendering?
parameter set this way has no working