如何用 js 注入 <meta> 到网页顶部？

Question

<meta http-equiv="Content-Security-Policy" content="block-all-mixed-content">
如何用js注入到网页顶部

Answer 1

const meta = document.createElement('meta')
meta.setAttribute('http-equiv', 'Content-Security-Policy')
meta.setAttribute('content', 'block-all-mixed-content')
document.head.appendChild(meta)