一个简易的实现：
<!DOCTYPE html>
<html>
<head>
<title>HTML5上传图片并预览</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script>
</head>
<body>
<h3>请选择图片文件：PNG/JPG/JPEG/SVG/GIF</h3>
<form name="form0" id="form0">
<input type="file" name="file0" id="file0" accept="image/gif,image/jpeg,image/jpg,image/png,image/svg"/><br>
<img src="" id="img0" style="width: 20rem;height: 15rem;">
</form>
<script type="text/javascript">
$("#file0").change(function(){
var objUrl = getObjectURL(this.files[0]) ;//获取文件信息
console.log("objUrl = "+objUrl);
if (objUrl) {
$("#img0").attr("src", objUrl);
}
});
function getObjectURL(file) {
var url = null;
if(window.createObjectURL!=undefined) {
url = window.createObjectURL(file) ;
}else if (window.URL!=undefined) { // mozilla(firefox)
url = window.URL.createObjectURL(file) ;
}else if (window.webkitURL!=undefined) { // webkit or chrome
url = window.webkitURL.createObjectURL(file) ;
}
return url ;
}
</script>
</body>
</html>
效果：
真正的传送给后台可以用ajax，但是我还不会搭后台
参考链接：
1. https://blog.csdn.net/qq_41485414/article/details/80051845
2. https://blog.csdn.net/x550392236/article/details/76690927
原文地址：https://www.cnblogs.com/lfri/p/12180633.html
时间： 2024-09-27 02:45:23