javascript - 完全坚持将 JQuery 加载到 WordPress 站点

Question

这似乎是一个简单的错误，但我一直坚持下去。

我正在使用我发现的脚本运行 WordPress 安装，该脚本隐藏了基于滚动的 header 。在我开始使用单独的文件将其加载到 WordPress 主题之前，它们的脚本在页面本身包含在标签中时完美运行。

wp_enqueue_script( 'greycanary-effects', get_template_directory_uri() . '/js/effects.js', array(), '20120206', true );

还有脚本...

( function() {
    var didScroll;
    var lastScrollTop = 0;
    var delta = 5;
    var navbarHeight = $('.main-navigation').outerHeight();

    jQuery(window).scroll(function(event){
        didScroll = true;
    });

    setInterval(function() {
        if (didScroll) {
            hasScrolled();
            didScroll = false;
        }
    }, 250);

    function hasScrolled() {
        var st = $(this).scrollTop();

        // Make sure they scroll more than delta
        if(Math.abs(lastScrollTop - st) <= delta)
            return;

        // If they scrolled down and are past the navbar, add class .nav-up.
        // This is necessary so you never see what is "behind" the navbar.
        if (st > lastScrollTop && st > navbarHeight){
            // Scroll Down
            $('.main-navigation').removeClass('nav-down').addClass('nav-up');
        } else {
            // Scroll Up
            if(st + $(window).height() < $(document).height()) {
                $('.main-navigation').removeClass('nav-up').addClass('nav-down');
            }
        }

        lastScrollTop = st;
    };
});

Answer 1

您需要将所有 $ 引用替换为“jQuery”；或者您需要创建一个名为“$”的变量:

例如把这个放在你的函数的顶部(){

(function(){
    $ = jQuery;
    ....

或

( function() {
    var didScroll;
    var lastScrollTop = 0;
    var delta = 5;
    var navbarHeight = jQuery('.main-navigation').outerHeight();

    jQuery(window).scroll(function(event){
        didScroll = true;
    });

    setInterval(function() {
        if (didScroll) {
            hasScrolled();
            didScroll = false;
        }
    }, 250);

    function hasScrolled() {
        var st = jQuery(this).scrollTop();

        // Make sure they scroll more than delta
        if(Math.abs(lastScrollTop - st) <= delta)
            return;

        // If they scrolled down and are past the navbar, add class .nav-up.
        // This is necessary so you never see what is "behind" the navbar.
        if (st > lastScrollTop && st > navbarHeight){
            // Scroll Down
            jQuery('.main-navigation').removeClass('nav-down').addClass('nav-up');
        } else {
            // Scroll Up
            if(st + jQuery(window).height() < jQuery(document).height()) {
                jQuery('.main-navigation').removeClass('nav-up').addClass('nav-down');
            }
        }

        lastScrollTop = st;
    };
});