Skip to content

Embed URL


Subversion checkout URL

You can clone with
Download ZIP
Turn image into Data URL and save in localStorage
// Get a reference to the image element
var elephant = document.getElementById("elephant");
// Take action when the image has loaded
elephant.addEventListener("load", function () {
var imgCanvas = document.createElement("canvas"),
imgContext = imgCanvas.getContext("2d");
// Make sure canvas is as big as the picture
imgCanvas.width = elephant.width;
imgCanvas.height = elephant.height;
// Draw image into canvas element
imgContext.drawImage(elephant, 0, 0, elephant.width, elephant.height);
// Get canvas contents as a data URL
var imgAsDataURL = imgCanvas.toDataURL("image/png");
// Save image into localStorage
try {
localStorage.setItem("elephant", imgAsDataURL);
catch (e) {
console.log("Storage failed: " + e);
}, false);

Note that this only works if the JS is running on the same site as the image, otherwise you'll get a CORS security error.


You can fix that CORS issue by defining crossOrigin attr with anonymous in elephant


Either I'm misreading or you need to allow CORS from the image server to allow this technique to work.


what is 'localStorage' is referring to?? what kinda object is this?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.