fullScrollJs constant

Implementation

static const fullScrollJs = """
(function() {
    var body = document.body;
    var html = document.documentElement;

    var totalWidth = Math.max(
        body.scrollWidth, html.scrollWidth,
        body.offsetWidth, html.offsetWidth,
        body.clientWidth, html.clientWidth
    );

    var totalHeight = Math.max(
        body.scrollHeight, html.scrollHeight,
        body.offsetHeight, html.offsetHeight,
        body.clientHeight, html.clientHeight
    );

    return [totalWidth, totalHeight];
})();
""";