download_something.js

// 需要在同網域執行 否則需要破解 注入腳本

var urls = [
    "abc.com"
];

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

async function wait_selector(basic_dom, selector_value, try_times) {
    for (var i = 0; i < try_times; i++) {
        var dom = basic_dom.document.querySelector(selector_value);

        if (dom != null)
        {
            return dom;
        }
        else
        {
            console.log("not found");
        }

        await sleep(1000);
    }

    return false;
}

var not_stop = false;

for (var url_index = 0; url_index < urls.length; url_index++) {
    var this_url = urls[url_index];
    var website = window.open(this_url, "");

    var dom = (await wait_selector(website, ".download", 30));
    
    if (dom != false) { dom.parentElement.click(); }
    
    var dom = (await wait_selector(website, "#tabDownload a", 30));
    
    if (dom != false) { dom.click(); }
    
    await sleep(10000);
    
    if (dom != false)
    {
        website.window.close();
    }
    
    if (not_stop)
    {
        break;
    }
}