java - Selenium 等待jQuery.Masonry

我正在尝试等待砌体完全用Java加载此代码

    String javaScript = "function defer() {"
                        +"if (window.jQuery.masonry)"
                        +"{ return true }"
                        +"else"
                        +"{ return false }"
                        +"}; defer()";

    boolean isMasonryLoaded=false;
    while(!isMasonryLoaded)
    {
        isMasonryLoaded = (boolean)(((JavascriptExecutor)driver).executeScript(javaScript));
    }

但是我在while(!isMasonryLoaded)处得到NullPointerException
有任何想法吗 ？

最佳答案

可能是您的脚本函数defer()在调用前未定义，您应该尝试使用executeAsyncScript，如下所示：-

String javaScript = "var callback = arguments[0];"+
            "function defer() {if (window.jQuery.masonry){ "+
            "callback(true) }else{ callback(false) }}; defer()";

boolean isMasonryLoaded=false;
while(!isMasonryLoaded)
{
 isMasonryLoaded = (boolean)(((JavascriptExecutor)driver).executeAsyncScript(javaScript));
}

希望能帮助到你..：）