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| // Lazy-create and return an indie-config load promise
// The promise will be resolved with a config once the indie-config has been loaded
var loadIndieConfig = function () {
// Create the Promise to return
var loadPromise = new Promise(function (resolve) {
// Parse the incoming messages
var parseIndieConfig = function (message) {
// Check if the message comes from the indieConfigFrame we added (or from some other frame)
if (message.source !== indieConfigFrame.contentWindow) {
return;
}
var indieConfig;
// Try to parse the config, it can be malformed
try {
indieConfig = JSON.parse(message.data);
} catch (e) {}
// We're done – remove the frame and event listener
window.removeEventListener('message', parseIndieConfig);
indieConfigFrame.parentNode.removeChild(indieConfigFrame);
indieConfigFrame = undefined;
// And resolve the promise with the loaded indie-config
resolve(indieConfig);
};
// Listen for messages from the added iframe and parse those messages
window.addEventListener('message', parseIndieConfig);
// Create a hidden iframe pointing to something using the web+action: protocol
var indieConfigFrame = document.createElement('iframe');
indieConfigFrame.src = 'web+action:load';
document.getElementsByTagName('body')[0].appendChild(indieConfigFrame);
indieConfigFrame.style.display = 'none';
});
// Ensure that subsequent invocations return the same promise
loadIndieConfig = function () {
return loadPromise;
};
return loadPromise;
};
loadIndieConfig().then(
function() {
console.log("yuri");
}
).catch(
function() {
console.log("fail");
}
); |
