jQuery Uncaught TypeError:对象[对象窗口]的属性'$'不是函数

Question

所有,我下载了一个预绑定的JS/CSS表单应用程序,我正在尝试在Wordpress中使用它.我有以下代码:

$(document).ready(function () {


/*----------------------------------------------------------------------*/
/* Parse the data from an data-attribute of DOM Elements
/*----------------------------------------------------------------------*/


$.parseData = function (data, returnArray) {
    if (/^\[(.*)\]$/.test(data)) { //array
        data = data.substr(1, data.length - 2).split(',');
    }
    if (returnArray && !$.isArray(data) && data != null) {
        data = Array(data);
    }
    return data;
};

/*----------------------------------------------------------------------*/
/* Image Preloader
/* http://engineeredweb.com/blog/09/12/preloading-images-jquery-and-javascript
/*----------------------------------------------------------------------*/



// Arguments are image paths relative to the current page.
$.preload = function() {
    var cache = [],
        args_len = arguments.length;
    for (var i = args_len; i--;) {
        var cacheImage = document.createElement('img');
        cacheImage.src = arguments[i];
        cache.push(cacheImage);
    }
};


/*----------------------------------------------------------------------*/
/* fadeInSlide by revaxarts.com
/* Fades out a box and slide it up before it will get removed
/*----------------------------------------------------------------------*/


$.fn.fadeInSlide = function (speed, callback) {
    if ($.isFunction(speed)) callback = speed;
    if (!speed) speed = 200;
    if (!callback) callback = function () {};
    this.each(function () {

        var $this = $(this);
        $this.fadeTo(speed / 2, 1).slideDown(speed / 2, function () {
            callback();
        });
    });
    return this;
};


/*----------------------------------------------------------------------*/
/* fadeOutSlide by revaxarts.com
/* Fades out a box and slide it up before it will get removed
/*----------------------------------------------------------------------*/


$.fn.fadeOutSlide = function (speed, callback) {
    if ($.isFunction(speed)) callback = speed;
    if (!speed) speed = 200;
    if (!callback) callback = function () {};
    this.each(function () {

        var $this = $(this);
        $this.fadeTo(speed / 2, 0).slideUp(speed / 2, function () {
            $this.remove();
            callback();
        });
    });
    return this;
};

/*----------------------------------------------------------------------*/
/* textFadeOut by revaxarts.com
/* Fades out a box and slide it up before it will get removed
/*----------------------------------------------------------------------*/


$.fn.textFadeOut = function (text, delay, callback) {
    if (!text) return false;
    if ($.isFunction(delay)) callback = delay;
    if (!delay) delay = 2000;
    if (!callback) callback = function () {};
    this.each(function () {

        var $this = $(this);
        $this.stop().text(text).show().delay(delay).fadeOut(1000,function(){
            $this.text('').show();
            callback();
        })
    });
    return this;
};

/*----------------------------------------------------------------------*/
/* leadingZero by revaxarts.com
/* adds a leding zero if necessary
/*----------------------------------------------------------------------*/


$.leadingZero = function (value) {
    value = parseInt(value, 10);
    if(!isNaN(value)) {
        (value < 10) ? value = '0' + value : value;
    }
    return value;
};


});

我假设Wordpress没有冲突导致问题,所以我更新了最后一个括号,如下所示:

}, "jQuery");

但是,我仍然遇到同样的错误.有谁知道会出现什么问题以及如何解决这个问题？

提前致谢!

Answer 1

这是一个语法问题,WordPress附带的jQuery库以"无冲突"模式加载.这是为了防止WordPress可以加载的其他JavaScript库的兼容性问题.在"无混淆"模式下,$快捷方式不可用,并且使用了更长的jQuery,即

jQuery(document).ready(function ($) {

通过在函数调用后包含$ in括号,您可以在代码块中使用此快捷方式.

有关详细信息,请参阅WordPress Codex

Answer 2

我最喜欢的不冲突友好的构造:

jQuery(function($) {
  // ...
});

使用函数指针调用jQuery是$(document).ready(...)的快捷方式

或者正如我们在coffeescript中所说:

jQuery ($) ->
  # code here

Answer 3

在Wordpress中只需更换

$(function(){...});

同

jQuery(function(){...});