javascript - A better test for base64 URI support (can I create a large base64-encoded image in JS?) -



javascript - A better test for base64 URI support (can I create a large base64-encoded image in JS?) -

i'm using modernizr observe features supported in browser our users running, far good. i've come against theoretical problem when testing base64 compatibility. patch back upwards detailed here, , works- except weird case ie8- it allows base64 encoded images of 32kb.

i don't want embed 32kb long base64 string within js file, it'll add together crazy amount of bloat. so, create 32kb- valid- image using js? i'm thinking repeating kind of pattern within string until reaches 32kb in length, sort of thing. or maybe taking existing tiny string (like 1 in modernizr patch) , adding junk info @ end still results in valid image.

i know next nil base64 encoding, other how manipulate existing image. have ideas?

i think have answer. tried sorts of techniques (repeated text chunks in png source manually add, etc) until found adding line breaks appears job:

var b64test = new image(); b64test.onload = function() { alert("yay!") } b64test.onerror = function() { alert("boo") } /* 1x1 gif image */ var base64str = "r0lgodlhaqabaiaaaaaaap///ywaaaaaaqabaaacauwaow==" while (base64str.length < 33000) { base64str = "\r\n" + base64str; } b64test.src= "data:image/gif;base64," + base64str;

fails in ie8, works in ie9 , others. i'd love hear alternatives, though.

javascript html5 base64 modernizr data-uri

Comments

Post a Comment

Popular posts from this blog

iphone - Dismissing a UIAlertView -

iphone - Dismissing a UIAlertView - i set in app purchase app, , when user taps button, purchase started. basically, tap button, , depending on speed on net connection, waiting 10 seconds until new alert view comes asking if purchase product. user tap button multiple times since nil came up, , multiple purchase alert views come up. additionally, maybe seen user app bug. in end, problem. i want alert view come spinning wheel says "loading..." when users taps purchase button. problem is, how dismiss when new alert view comes asking user if want purchase product? if ([uialertview alloc] says: @"whatever apple's alert view says") { //dismiss "loading..." alert view here } i uncertainty work, input appreciated. thanks! you need have access alertview. can this. create alertview instance var in app delegate , when want show loading initialize instance var assign property , when want dismiss phone call [alertviewinstance d...
Read more

intellij idea - Update external libraries with intelij and java -

intellij idea - Update external libraries with intelij and java - simple plenty really. i'm using apache jars, i'll create changes jar's every often. these jars listed external libs in intelij (i.e classpath looking install dir of jar's). when create changes intelij doesn't seem know new implementation. have remove jar external library , re-ad it. does know have intelij picks changes automatically ? i've done clean , rebuild project had little effect. you can go preferences -> build, execution, deployment -> build tools -> maven -> importing , check box says import maven projects automatically . in mac, can command + shift + a , come in action reimport , click on reimport maven projects . intellij-idea
Read more

javascript - send data from a new window to previous window in php -

javascript - send data from a new window to previous window in php - i have image in main.php file : <img src="..\images\image.gif" class="cur" onclick="imgwin();"> when click on image below function has called : function imgwin() { imagewin=window.open("../pages/img.php","imagewin","toolbar=no,width=500,height=200,directories=no,menubar=no,scrollbars=yes"); } this function opens img.php in new window img.php file : <html> <head> <title>upload image</title> </head> <body> <form name="imgform" method="get" action="#"> address : <input type="file" name="imgurl" size="50"> description : <input type="text" name="description" size="50"> <input type="submit" value="sumbit...
Read more