functiongetBase64ImageSize(base64) { letstr =atob(base64.split(',')[1]); letbytes = str.length; returnbytes; } 如果要获得KB的就除以1024 functiongetBase64ImageSizeInKB(base64) { letbytes =getBase64ImageSize(base64); letsizeInKB = bytes /1024; returnsizeInKB; } 此函数首先使用atob()...
How to get the original size of an image using JavaScript All In One 如何使用 JavaScript 获取一个图片像的原始大小 naturalWidth&naturalHeight https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/naturalWidth https://developer.mozilla.org/en-US/docs/Web/API/HTMLImageElement/naturalHeight E...
clientHeight; alert("Current width=" + currWidth + ", " + "Original height=" + currHeight); } Get Current Image Size Related FAQHere are some more FAQ related to this topic:How to get original image size in JavaScript How to increase and decrease image size using JavaScript How ...
Read this tutorial and learn the two methods of getting the width and height of the image. Learn about the properties that help to get the image size.
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varimg=document.getElementById('image');varctx=document.getElementById('canvas').getContext('2d');ctx.drawImage(img,0,0);varrgba=ctx.getImageData(0,0,480,360).data;// the size of the image is 480x360 (width x height) 下面,我们编写一个辅助函数,将输入的RGBA数组转换为灰度: ...
javascript 未捕获DOM异常：无法对"画布渲染上下文2D"执行"getImageData"如果您在画布上绘制从单独来源检索...
new Image(); // 图片大小: 1232.7kb size=1232.7; image.src='https://raw.githubcontent.com/Urinx/brow/master/screenshot/test.jpg; startTime=new Date().getTime(); // 图片加载完毕 image.onload=function(){ endTime=new Date().getTime(); // kb/s speed=size/((Time-startTime)/...
What is a Lazy Loading Image? Lazy Loading images is a technique to load images on a web page only when required. This way can improve the page’s loading time without reducing the page size. Users can only view its first fold and associated images when they open a website. The images...
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