灰色元素通常具有 disabled 属性，而启用的元素 enabled 或者只是失踪 disabled 或者类似的东西。在大多数情况下，这可能是一个明确的指示。

当按钮可用时，我看到了一个区别，

<input class="form-control qty" name="qty" type="number" value="1" min="1">

您可以使用以下代码块来检查何时单击：
代码：

try {
    if (driver.findElements(By.xpath("//input[@name='qty' and @class='form-control qty' and @type='number']")).size()  > 0 ) {
        System.out.println("This means button is available to click");
        // code to click on button should be written here
    }
    else {
        System.out.println("Button must be greyed out, if you are seeing this");
        // do some stuff to make button available
    }
}
catch(Exception e) {
    System.out.println("Check the code again, looks like some issue. ");
    e.printStackTrace();
}

Have you check this way

代码：

WebElement element =(WebElement)((JavascriptExecutor)driver)
.executeScript("return document.querySelector('JS Path')");

if(element.isEnabled() && element.isDisplayed()){
element.click();
}else {
    //statement for not displayed   
}