如何使用 JavaScript 截取部分谷歌地图的截图
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How to take the screenshot of part of Google Maps use JavaScript
提问by wong2
On my page, there is a container which use Google Maps API to display a map, there is a button below it, user can drag the map to a position, then click the button, I'd like to take the screenshot of the map displayed in the container now and show it in a canvas. Is it possible to do this with pure JavaScript?
在我的页面上，有一个使用Google Maps API来显示地图的容器，它下面有一个按钮，用户可以将地图拖动到某个位置，然后单击该按钮，我想截取地图的截图现在显示在容器中并将其显示在画布中。是否可以使用纯 JavaScript 做到这一点？
Just need to support Chrome
只需要支持Chrome
回答by rogal111
It will be hard to do without browser support. But you can use Google Static Maps API: https://developers.google.com/maps/documentation/staticmaps/
如果没有浏览器的支持，这将是很难做到的。但您可以使用 Google 静态地图 API：https: //developers.google.com/maps/documentation/staticmaps/
Example: https://developers.google.com/maps/documentation/staticmaps/#quick_example
示例：https: //developers.google.com/maps/documentation/staticmaps/#quick_example
There is some projects to draw HTML DOM to canvas:
有一些项目可以将 HTML DOM 绘制到画布上：
- HTML2Canvas: http://html2canvas.hertzen.com/index.html
- jsFeedback: http://hertzen.com/experiments/jsfeedback/
- HTML2Canvas：http://html2canvas.hertzen.com/index.html
- jsFeedback：http://hertzen.com/experiments/jsfeedback/
You can also integrate javascript with some server-side solution (using webkit) for example phantomjs
您还可以将 javascript 与一些服务器端解决方案（使用 webkit）集成，例如phantomjs
Code example: (read more here)
代码示例：（在此处阅读更多内容）
var page = require('webpage').create();
page.open('http://www.google.com', function() {
page.viewportSize = {width: 1024, height: 768};
page.render('screenshot.png');
phantom.exit();
});
If you need only chrome solution for specific range of users you can write your own chrome extension to do this: Taking screenshot using javascript for chrome extensions
如果您只需要针对特定用户范围的 chrome 解决方案，您可以编写自己的 chrome 扩展来执行此操作：使用 javascript 进行 chrome 扩展的截屏
