javascript - 使用 html2canvas 时不显示谷歌地图

Question

我已经做了截图按钮，必须对所有的 body 进行截图。

但是在这张截图上谷歌地图并没有显示出来。 我使用 html2canvas 库来做到这一点。 这是代码:

HTML:

 <button type="button" class="btn btn-default btn-sm" id = 'screenShotBtn' onclick="takeScreenShot()"> 

JavaScript :

var takeScreenShot = function() {
var screenshot = {};
html2canvas(document.getElementById('screenAll'), {
    onrendered: function (canvas) {
        var tempcanvas=document.createElement('canvas');
        tempcanvas.width=1350;
        tempcanvas.height=700;
        var context=tempcanvas.getContext('2d');
        context.drawImage(canvas,0,0,1350,700,0,0,1350,700);
        var link=document.createElement("a");
        link.href=tempcanvas.toDataURL('image/jpg');   //function blocks CORS
        link.download = 'screenshot.jpg';
        link.click();
    }
});

这是我制作屏幕截图时的内容:

look here for screenshot

你能告诉我有什么问题吗？

Answer 1

我将这些属性添加到代码中并且它有效:

var takeScreenShot = function() {
    var screenshot = {};
    html2canvas(document.getElementById('map'), {
        useCORS: true,
        optimized: false,
        allowTaint: false,
        onrendered: function (canvas) {
            var tempcanvas=document.createElement('canvas');
            tempcanvas.width=1350;
            tempcanvas.height=700;
            var context=tempcanvas.getContext('2d');
            context.drawImage(canvas,0,0,1350,700,0,0,1350,700);
            var link=document.createElement("a");
            link.href=tempcanvas.toDataURL('image/jpg');   //function blocks CORS
            link.download = 'screenshot.jpg';
            link.click();
        }
    });
}