<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="file" id="file" multiple="multiple" onchange="read()">
<div id="imgDiv"></div>
</body>
<script>
//可以选择多个文件加载在页面
function read(){
var file = document.getElementById("file");
var imgDiv = document.getElementById("imgDiv");
for(var i=0;i<file.files.length;i++){
let reader = new FileReader();
var file1 = file.files[i];
reader.readAsDataURL (file1);
reader.onload = function (result) {
//reader对象的result属性存储流读取的数据
imgDiv.innerHTML += '<img src="' + reader.result + '" alt=""/>'
console.log(reader.result) // 打印出转换后的base64
}
}
}
</script>
</html>
推荐博客：https://blog.csdn.net/yaoyuan_difang/article/details/38582697