图像转换为Base64 [英] Image convert to Base64
问题描述
< input type =fileid =asd/>
一旦用户选择了,我想获取 base64 中的图像(在提交表单之前)
如下所示:
$(输入).on('change',function(){
var data = $(this).val()。base64file(); //它不是一个插件只是一个例子
alert数据);
});
我阅读了关于File API和其他东西,我想要一个简单的跨浏览器解决方案(IE6 / IE7排除明显)
任何帮助谢谢。
div class =snippetdata-lang =jsdata-hide =falsedata-console =falsedata-babel =false>
< input id =inptype ='file'>< p id =b64>< / p>< img id =imgheight =150
( PS: / strong> base64编码图像(String)原始图像数据大小的4/3)
浏览器支持: http:/ /caniuse.com/#search=file%20api
更多信息: https://developer.mozilla.org/en-US/docs/Web/API/FileReader
<input type="file" id="asd"/>
I would like to get the image in base64 once the user chose that (before submitting the form)
Something like :
$(input).on('change',function(){
var data = $(this).val().base64file(); // it is not a plugin is just an example
alert(data);
});
I read about File API and other stuffs, I would like a simple and cross-browsers solution (IE6/IE7 excluded obviously)
Any help appreciated thanks.
function readFile() {
if (this.files && this.files[0]) {
var FR= new FileReader();
FR.addEventListener("load", function(e) {
document.getElementById("img").src = e.target.result;
document.getElementById("b64").innerHTML = e.target.result;
});
FR.readAsDataURL( this.files[0] );
}
}
document.getElementById("inp").addEventListener("change", readFile);
<input id="inp" type='file'>
<p id="b64"></p>
<img id="img" height="150">
(P.S: A base64 encoded image (String) 4/3 the size of the original image data)
Check this answer for multiple images upload.
Browser support: http://caniuse.com/#search=file%20api
More info here: https://developer.mozilla.org/en-US/docs/Web/API/FileReader
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