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调用window.print()方法,如何获取打印完成的回调事件?

image.png
请问js 有没有方法可以获取到点击了这个打印按钮的回调事件。


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by (71.8m points)

看这里

(function() {

    var beforePrint = function() {
        console.log('打印前');
    };

    var afterPrint = function() {
        console.log('打印后');
    };

    if (window.matchMedia) {
        var mediaQueryList = window.matchMedia('print');
        mediaQueryList.addListener(function(mql) {
            if (mql.matches) {
                beforePrint();
            } else {
                afterPrint();
            }
        });
    }

    window.onbeforeprint = beforePrint;
    window.onafterprint = afterPrint;

}());

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