如果你正在处理客户端上的文件选择,你可以直接使用FileReader API,而不需要XMLHttpRequest,如下所示: javascript function convertImageToBase64ClientSide(file, callback) { const reader = new FileReader(); reader.onload = function(e) { const base64Encoded = e.target.result; callback(base64Encoded); }...
要使用 JavaScript 将图像转换为 Base64,我们需要首先将图像加载到 canvas 元素中,然后使用 canvas 元素将图像编码为 Base64。 举个例子: // Get the image elementconstimg=document.getElementById('my-image');// Create a canvas elementconstcanvas=document.createElement('canvas');// Set the canvas dimen...
方法一: canvas,该方法就是通过javascript中的canvas属性将图片转成base64,主要用到了canvas中的toDataUrl方法,该方法可以将canvas转成base64,所以关键点就是先获取图片的宽高,再将图片放入canvas中,再使用toDataUrl就可以转成base64了。如果在本地引用网络图片可能会出现报错:Failed to execute 'toDataURL' on 'HTML...
有时候我们经常会遇到一个问题就是把image变成date64储存起来. 一般用法就是利用canvas转base64. 比如说这个库就可以用 hongru/canvas2image: a tool for saving or converting canvas as img 但是美中不足的就是它不是Promise, 所以我就自己写了一个. 废话不多说, 直接上代码: const urlMaps = {}; /...
From: https://bytenota.com/javascript-convert-image-to-base64-string/ his post shows you two approaches how to convert an image to a Base64 string using JavaScript: HTML5 Canvas and FileReader. 1. Approach 1: HTML5 Canvas example.js function toDataURL(src, callback) { var image = new...
在控制器中,你可以使用JavaScript的FileReader对象来读取图片文件,并将其转换为base64编码:app.controller('ImageController', function($scope) { $scope.imageURL = 'path/to/image.jpg'; // 设置图片URL // 将图片URL转换为base64编码 function convertImageToBase64(url, callback) { var xhr = new XMLHt...
JavaScript – Convert Image to Base64 String his post shows you two approaches how to convert an image to a Base64 string using JavaScript: HTML5 Canvas and FileReader. 1. Approach 1: HTML5 Canvas example.js...
} const img = await loadImg(url, 'Anonymous') return toBase64(img, outputFormat) } 自我感觉良好,但是运行之后报错了 Uncaught DOMException: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported. 谷歌翻译:canvas无法执行toDataURL方法:污染的画布无法输出 ...
Select Your Image File: Choose your image format (e.g., HEIC, PNG, SVG) and upload it to the converter. Generate the Base64 Code: The tool automatically converts your image and generates the Base64 string. Copy the Code: Use the generated code in your HTML, CSS, or JavaScript to emb...
function imgToBase64(url, callback) { let canvas = document.createElement('canvas'), c...