从影子DOM脚本访问全局文档

Question

我有以下svg。当然document.body始终为null，因为它引用影子DOM。是否可以通过此脚本访问全局文档？

[请不要告诉我这没有道理，相信我会。

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="266" height="100" viewBox="0 0 266 100"
    overflow="visible" enable-background="new 0 0 266 100" xml:space="preserve">
    <g><rect fill="#3B5998" width="266" height="100"/></g>
    <g>
        <path fill="#FFFFFF" d="M242.2011719,66.1777344c1.4726562,0,2.6464844,1.2011719,2.6464844,2.7011719
            c0,1.5234375-1.1738281,2.7109375-2.6572266,2.7109375c-1.4755859,0-2.6728516-1.1875-2.6728516-2.7109375
            c0-1.5,1.1972656-2.7011719,2.6728516-2.7011719H242.2011719z M242.1904297,66.5976562
            c-1.1865234,0-2.1582031,1.0214844-2.1582031,2.28125c0,1.2832031,0.9716797,2.2910156,2.1689453,2.2910156
            c1.1982422,0.0117188,2.1552734-1.0078125,2.1552734-2.2792969s-0.9570312-2.2929688-2.1552734-2.2929688H242.1904297z
             M241.6865234,70.4511719h-0.4804688V67.4375c0.2519531-0.0351562,0.4921875-0.0703125,0.8515625-0.0703125
            c0.4560547,0,0.7539062,0.0957031,0.9365234,0.2265625c0.1767578,0.1328125,0.2724609,0.3359375,0.2724609,0.6230469
            c0,0.3984375-0.2617188,0.6367188-0.5849609,0.734375v0.0234375c0.2626953,0.0488281,0.4423828,0.2871094,0.5029297,0.7304688
            c0.0703125,0.46875,0.1425781,0.6484375,0.1904297,0.7460938h-0.5029297
            c-0.0712891-0.0976562-0.1435547-0.3730469-0.2041016-0.7695312c-0.0703125-0.3828125-0.2636719-0.5273438-0.6484375-0.5273438
            h-0.3330078V70.4511719z M241.6865234,68.7832031h0.3476562c0.3935547,0,0.7285156-0.1445312,0.7285156-0.5175781
            c0-0.2636719-0.1904297-0.5273438-0.7285156-0.5273438c-0.1572266,0-0.265625,0.0117188-0.3476562,0.0234375V68.7832031z"/>
    </g>
    <script>console.log(document.body)</script>
</svg>

Answer 1

您的访问权是通过：

window.top.document.body