1.今天开发的时候，遇到了这个错误：

Uncaught TypeError: Cannot read properties of null (reading 'add')

报错代码：

$('.course-slider').slick({
            infinite: true,
            slidesToShow: 6,
            centerMode: false,
            centerPadding: '10px',
            slidesToScroll: 1,
            autoplay: true,
            autoplaySpeed: 8000,
            draggable: false,
            speed: 1000,

            responsive: [
                {
                    breakpoint: 1024,
                    settings: {
                        slidesToShow: 4,
                        slidesToScroll: 1,
                        infinite: true,
                        dots: true
                    }
                },
                {
                    breakpoint: 800,
                    settings: {
                        slidesToShow: 4,
                        slidesToScroll: 1,

                    }
                },
                {
                    breakpoint: 600,
                    settings: {
                        slidesToShow: 2,
                        slidesToScroll: 1
                    }
                },
                {
                    breakpoint: 480,
                    settings: {
                        slidesToShow: 2,
                        slidesToScroll: 1
                    }
                }
            ]
        });
    });

解决方案如下：

$('.course-slider').not('.slick-initialized').slick({
            infinite: true,
            slidesToShow: 6,
            centerMode: false,
            centerPadding: '10px',
            slidesToScroll: 1,
            autoplay: true,
            autoplaySpeed: 8000,
            draggable: false,
            speed: 1000,

            responsive: [
                {
                    breakpoint: 1024,
                    settings: {
                        slidesToShow: 4,
                        slidesToScroll: 1,
                        infinite: true,
                        dots: true
                    }
                },
                {
                    breakpoint: 800,
                    settings: {
                        slidesToShow: 4,
                        slidesToScroll: 1,

                    }
                },
                {
                    breakpoint: 600,
                    settings: {
                        slidesToShow: 2,
                        slidesToScroll: 1
                    }
                },
                {
                    breakpoint: 480,
                    settings: {
                        slidesToShow: 2,
                        slidesToScroll: 1
                    }
                }
            ]
        });
    });

解决的核心就是加上下面的代码：

.not('.slick-initialized')

这个报错就解决，但是不能自动的滑动了，这个我还要继续研究一下，希望大家多留言一起解决。