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Fix eval() when TrustedScript assignment is required #12

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Fix eval() when TrustedScript assignment is required #12

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18 changes: 16 additions & 2 deletions YouTube Livechat Channel Resolver.user.js
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,9 @@ var main = function() {
// backup the original fetch function
var originalFetch = window.fetch;

// trusted type policy
var trustedTypePolicy = window.trustedTypePolicy;

// helper functions used to intercept and modify youtube api responses
var responseProxy = function(callback) {
XMLHttpRequest.prototype.open = function() {
Expand Down Expand Up @@ -206,7 +209,7 @@ var main = function() {
var scripts = document.getElementsByTagName("script");
for (var script of scripts) {
if(script.text.indexOf("window[\"ytInitialData\"]") >= 0) {
window.eval(script.text.replace("ytInitialData", "ytInitialData_original"));
window.eval(trustedTypePolicy.createScript(script.text.replace("ytInitialData", "ytInitialData_original")));
}
}

Expand All @@ -224,7 +227,18 @@ var injectScript = function(frameWindow) {

console.info("Run Fury, run!");

frameWindow.eval("("+ main.toString() +")();");
// Set up passthrough trusted types policy if supported by the browser
if (frameWindow.trustedTypes) {
frameWindow.trustedTypePolicy = frameWindow.trustedTypes.createPolicy("ytgtc_policy", {
createScript: value => value,
});
} else {
frameWindow.trustedTypePolicy = {
createScript: value => value,
};
}

frameWindow.eval(frameWindow.trustedTypePolicy.createScript("("+ main.toString() +")();"));
}

// We need this to detect the chat frame in firefox
Expand Down