圖片上傳前預覽演示
阿新 • • 發佈：2018-11-13
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>圖片上傳前預覽演示</title>
<script src="http://cdn.bootcss.com/jquery/1.8.3/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
jQuery.fn.extend({
preview: function (opts) {
var _self = this,
_this = $(this);
opts = jQuery.extend({
img: "img",
imgType: ["jpeg", "jpg", "gif", "bmp", "png"]
}, opts || {});
_self.getObjectURL = function (file) {
var url = null;
if (window.createObjectURL != undefined) {
url = window.createObjectURL(file)
} else if (window.URL != undefined) {
url = window.URL.createObjectURL(file)
} else if (window.webkitURL != undefined) {
url = window.webkitURL.createObjectURL(file)
}
return url
};
_this.change(function () {
if (this.value) {
if (!RegExp("\.(" + opts.imgType.join("|") + ")$", "i").test(this.value.toLowerCase())) {
alert("請選擇以下型別圖片：" + opts.imgType.join("，") );
this.value = "";
return false
}
$("#" + opts.img).attr('src', _self.getObjectURL(this.files[0]));
}
})
}
});
</script>
<script>
$(function () {
$("#up").preview({ img: "img",width:"100px"});
});
</script>
</head>
<body>
<div style="width:500px;margin:0px auto;"><h2>圖片上傳前預覽演示</h2>
<div><img id="img" width="200px" /></div>
<input type="file" id="up" />
</div>
</body>
</html>
<html>
<head>
<meta charset="utf-8">
<title>圖片上傳前預覽演示</title>
<script src="http://cdn.bootcss.com/jquery/1.8.3/jquery.min.js" type="text/javascript"></script>
<script type="text/javascript">
jQuery.fn.extend({
preview: function (opts) {
var _self = this,
_this = $(this);
opts = jQuery.extend({
img: "img",
imgType: ["jpeg", "jpg", "gif", "bmp", "png"]
}, opts || {});
_self.getObjectURL = function (file) {
var url = null;
if (window.createObjectURL != undefined) {
url = window.createObjectURL(file)
} else if (window.URL != undefined) {
url = window.URL.createObjectURL(file)
} else if (window.webkitURL != undefined) {
url = window.webkitURL.createObjectURL(file)
}
return url
};
_this.change(function () {
if (this.value) {
if (!RegExp("\.(" + opts.imgType.join("|") + ")$", "i").test(this.value.toLowerCase())) {
alert("請選擇以下型別圖片：" + opts.imgType.join("，") );
this.value = "";
return false
}
$("#" + opts.img).attr('src', _self.getObjectURL(this.files[0]));
}
})
}
});
</script>
<script>
$(function () {
$("#up").preview({ img: "img",width:"100px"});
});
</script>
</head>
<body>
<div style="width:500px;margin:0px auto;"><h2>圖片上傳前預覽演示</h2>
<div><img id="img" width="200px" /></div>
<input type="file" id="up" />
</div>
</body>
</html>