javascript jQuery:如何使用“$”而不是“jQuery”?

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时间:2020-10-25 21:21:13  来源:igfitidea点击:

jQuery: How can I use "$" instead of "jQuery"?

javascriptjquery

提问by Linksku

I have simple jQuery in my site, yet I keep getting this error:

我的网站中有简单的 jQuery,但我不断收到此错误:

Uncaught TypeError: Property '$' of object [object DOMWindow] is not a function

The error only appears if I use "$" instead of "jQuery".

只有当我使用“$”而不是“jQuery”时才会出现错误。

// This works
jQuery(document).ready(function() {
    jQuery('#pass').keyup( ... );
});

// This doesn't
$(document).ready(function() {
    $('#pass').keyup( ... );
});

Do I need to do anything to use "$"?

我需要做什么才能使用“$”吗?

回答by anton_byrna

You can wrap your code:

您可以包装您的代码:

(function($) {
    // here $ would be point to jQuery object
    $(document).ready(function() {
        $('#pass').keyup( ... );
    });
})(jQuery);

回答by Dan Smith

You probably have jQuery noConflict mode enabled somewhere in your code, see: http://api.jquery.com/jQuery.noConflict/

您可能在代码中的某处启用了 jQuery noConflict 模式,请参阅:http://api.jquery.com/jQuery.noConflict/

jQuery.noConflict(); // Stops $ from workng

回答by Clueless

First, jQuery objects are a lot like arrays, so [object DOMWindow]actually isa jQuery object most likely.

首先,jQuery 对象很像数组,因此[object DOMWindow]实际上最有可能jQuery 对象。

You might have a syntax error, like a missing semicolon, right before the call to $(document)which is making the $look like a property access.

您可能有一个语法错误,比如缺少分号,就在调用$(document)它之前,它$看起来像一个属性访问。