String.prototype.replaceAll = function(find, replace) {
	if (typeof find == 'string') return this.split(find).join(replace);
	let t = this, i, j;
	while (typeof(i = find.shift()) == 'string' && typeof(j = replace.shift()) == 'string') t = t.replaceAll(i || '', j || '');
	return t;
};
function html(input) {
	return input.toString().replaceAll(['&', '<', '>', '"', '\t', '\n', '\b'], ['&amp;', '&lt;', '&gt;', '&quot;', '&#9;', '&#10;', '']);
}

"message": "Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': The document is sandboxed and lacks the 'allow-same-origin' flag.",

document.createTextNode()!
Uncaught SyntaxError: Unexpected token !

var convert = function(str) {
    return !str ? "" // eslint-disable-line no-negated-condition
    : str.replace(/&/g, "&")
         .replace(/>/g, ">")
         .replace(/&lt;/g, "<")
         .replace(/&quot;/g, "\"")
         .replace(/&#39;/g, "'");
};

var log = console.log
console.log = function(){
    log.apply(null, Array.from(arguments).map(function(arg){
        return typeof arg != "string"
            ? arg
            : arg.replace(/>/g, "&gt;").replace(/</g, "&lt;");
     }));
}