简介 naturalWidth和naturalHeight是html5新增的属性,它们可以直接获取图片的原始宽高。而且这在Fixefox/Chrome/Safari/Opera/IE9里已经实现。 看看naturalWidth和naturalHeight在各大浏览器中兼容性如下: 图片截取自:http://caniuse.com/#search=na... ...
...pectWidth = this.naturalWidth; var expectHeight = this.naturalHeight; if (this.naturalWidth > this.naturalHeight && this.naturalWidth > 800) { ...
...uralWidth: img[i].naturalWidth, height: img[i].height, naturalHeight: img[i].naturalHeight, isStandard: !((img[i].width * 10 { const arr = [ ...document.querySe...
... canvas.width = this.naturalWidth; canvas.height = this.naturalHeight; var ctx = canvas.getContext(2d); ctx.drawImage(this, 0, 0, this.naturalWidth, this....
...console.log(图片原始宽高:, img_original.naturalWidth, img_original.naturalHeight); console.log(图片原始大小:, file.size) } }; reader.readAsDataURL(file); } 2. 使用...
...idth/swidth*heightx:0y:0width:图像的naturalWidthheight:图像的naturalHeight JavaScript 语法 2 在画布上定位图像,并规定图像的宽度和高度: context.drawImage(img,sx,sy,swidth,sheight); 此时其他的默认值为:x:0y:0width:图像的naturalWidthheight:...
...ght){ var $img = $(el), img = $img[0]; var imgHeight = img.naturalHeight, imgWidth = img.naturalWidth, finalWidth, finalHeight, tsffix = ; var rm...
...console.log(图片原始宽高:, img_original.naturalWidth, img_original.naturalHeight); console.log(图片原始大小:, file.size) } }; reader.readAsDataURL(file); } 2. 使用...
...过计算得出画布的宽与高: let imgRatio = img.naturalWidth / img.naturalHeight; // 创建一个画布容器; let cvs = document.createElement(canvas); // 获取容器中的画板; let ctx = cvs.getContext(2d); cvs.width = 1000; cvs.height = ...
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