javascript - Setting the value of 'dataURL' exceeded the quota

Question

I have a JavaScript code which save string to the Local storage, the string size is 400000,

var dataURL = canvas.toDataURL("image/jpg").toString();
localStorage.setItem("dataURL", dataURL);

I open the html file from chrome, in one computer its OK in the other computer i get

Uncaught QuotaExceededError: Failed to execute 'setItem' on 'Storage': Setting the value of 'dataURL' exceeded the quota.

In this computer I allowed to save string length no more than 100000 chars. Both computers have the same chrome's Version 35.0.1916.114 m Why?

Answer 1

When your browser reaches to maximum limit it will throw this error Failed to execute 'setItem' on 'Storage': Setting the value of '' exceeded the quota.

• You can handle it like this

 try {
     var count = 100;
     var message = "LocalStorageIsNOTFull";
     for (var i = 0; i <= count; count + 250) {
         message += message;
         localStorage.setItem("stringData", message);
         console.log(localStorage);
         console.log(count);
     }

 }
 catch (e) {
     console.log("Local Storage is full, Please empty data");
     // fires When localstorage gets full
     // you can handle error here or empty the local storage
 }