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좋은 데이터 시각화 라이브러리D3https://d3js.org/ D3 by Observable | The JavaScript library for bespoke data visualizationD3 The JavaScript library for bespoke data visualization Create custom dynamic visualizations with unparalleled flexibilityd3js.org vis.jshttps://visjs.org/ vis.jsvis.js community edition A dynamic, browser based visualization library. The library is designed to be easy to use, to handle l..

// 배경 밝기 판정 getPixelBrightness() { const img = new Image(); img.crossOrigin = `Anonymous`; img.src = this.storageUrl + '/' + this.board['selectedBackgroundPath']; img.onload = () => { const canvas = document.createElement('canvas'); const context = canvas.getContext('2d'); canvas.width = img.width; canvas.height = img.height; context.drawImage(img, 0, 0); // const imageData = context.getImageDat..

크로스 오리진 속성 추가 https://stackoverflow.com/questions/22097747/how-to-fix-getimagedata-error-the-canvas-has-been-tainted-by-cross-origin-data How to fix getImageData() error The canvas has been tainted by cross-origin data? My code is working very well on my localhost but it is not working on the site. I got this error from the console, for this line .getImageData(x,y,1,1).data: Uncaught SecurityErr..