PhantomJS 能不能實現將瀏覽器頁面的某個div對應的顯示區域截圖

var Nightmare = require('nightmare');

var Screenshot = require('nightmare-screenshot');

var nightmare = new Nightmare();

nightmare

.viewport(1024, 700)

.goto(pageUrl)

.use(Screenshot.screenshotSelector(tempPath, '.question-answer-detail'));