<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>簡單的html5 File測試 for pic2base64</title> <script> window.onload = function(){ var input = document.getElementById("demo_input"); var result= document.getElementById("result"); var img_area = document.getElementById("img_area"); if ( typeof(FileReader) === 'undefined' ){ result.innerHTML = "抱歉,你的瀏覽器不支持 FileReader,請使用現代瀏覽器操做!"; input.setAttribute( 'disabled','disabled' ); } else { input.addEventListener( 'change',readFile,false );} } function readFile(){ var file = this.files[0]; console.log(file); //這裏咱們判斷下類型若是不是圖片就返回 去掉就能夠上傳任意文件 if(!/image\/\w+/.test(file.type)){ alert("請確保文件爲圖像類型"); return false; } var reader = new FileReader(); reader.readAsDataURL(file); reader.onload = function(e){ //result.innerHTML = '<img src="'+this.result+'" alt=""/>'; //img_area.innerHTML = '<div class="sitetip">圖片img標籤展現:</div><img src="'+this.result+'" alt=""/>'; } } </script> </head> <body> <input type="file" value="sdgsdg" id="demo_input" /> <textarea id="result" rows=30 cols=300></textarea> <p id="img_area"></p> </body> </html>