[BUG] GM_addElement Bug

[cyfung1031]

Problem Description

• GM_addElement should allow onX event listeners Tampermonkey/tampermonkey#2603

// ==UserScript==
// @name         GM_addElement test
// @match        *://*/*
// @grant        GM_addElement
// ==/UserScript==

console.log('image insertion begin');

await new Promise((resolve, reject) => {
    GM_addElement(document.body, 'img', {
        src: 'https://www.tampermonkey.net/favicon.ico',
        onload: resolve,
        onerror: reject
    });

    console.log('image insertion end');
});

console.log('image loaded'); // never fired

Reproduction Steps

ScriptCat Version

1.2.x & 1.3.x

Operating System and Browser Information

Additional Information (Optional)

No response

[cyfung1031]

呀。我想的复杂了
其实这个最初放在 content script 搞是因为插不进元素
插元素后，元素的内容就在原本的 page 脚本做吧