Chrome App FileReader -

i'm trying make use of file system api in chrome app. i've tried sample code can find , can't simple text file read. i'm logging every step, , seems happen (or not happen) stops first time reference file reader object. creates fine, because can log .readystate, after can't seem set onload()event or execute .readastext().

here's i'm calling button:

 function clickbutton(){    chrome.filesystem.chooseentry({type: 'openfile', acceptsmultiple: false}, function(fileentry){     if(chrome.runtime.lasterror) {console.warn("warning: " + chrome.runtime.lasterror.message);}     else{       console.log(fileentry);       var thing = new filereader();       console.log(thing.readystate);       thing.onloadstart(function(){         console.log("started loading " & fileentry);       });       console.log("added onloadstart");       console.log(thing.readystate);       console.log(thing);       thing.readastext(fileentry);       console.log(thing.readystate);       console.log(thing.result);     }   });    document.getelementbyid("status").innerhtml = "i did something";  } 

i did read somewhere chrome doesn't allow access local files, chrome apps seem different. @ least, documentation seems suggest that.

the thing end in console fileentry object.

https://developer.chrome.com/apps/app_storage#filesystem

i've used example code right above link , still can't right. else have issue or know i'm doing wrong?

there difference between fileentry , file. need call fileentry's .file() method. so, replace

thing.readastext(fileentry); 

with

fileentry.file(function(file) {   thing.readastext(file) }) 

https://developer.mozilla.org/en-us/docs/web/api/fileentry#file