typeScript中的 ?: 问号冒号解释,ts可选参数
function f(x: number, y?: number) {return x (y || 0);
}
f(1, 2);
f(1);
f(1, undefined);
f(1, null); // error, null is not assignable to number | undefinedclass C {a: number;b?: number;
}
let c new …
一、环境地址
XSS Game - Learning XSS Made Simple! | Created by PwnFunction
二、案例复现
案列1——Ma Spaghet! <!-- Challenge -->
<h2 id"spaghet"></h2>
<script>spaghet.innerHTML (new URL(location).searchParams…