jquery gets tags without class

When developing front-end web pages, we often need to obtain HTML tags through JavaScript code for operations, such as modifying tag styles or content, etc. These operations can be easily accomplished using the jQuery library. In jQuery, we can use the selector to select the HTML tags that need to be operated.

Generally speaking, we can use the tag name or class name as a selector to select HTML tags. For example, the code to select all DIV tags is:

$("div")

If you need to select the DIV tag with the class name "test", the code is as follows:

$("div.test")

However, in some cases, we may You need to select a tag without a class name (for example, a SPAN tag without a class name). At this time, we can use jQuery's not() method to complete it.

not() method is used to remove specified elements from a set of matching elements. We can filter out SPAN tags without class names, and then add not() to exclude SPAN tags with class names. The code is as follows:

$("span").not("[class]")

The above code means to select all SPAN tags and delete them. Tags with class attributes, resulting in SPAN tags without class names.

In addition to using the not() method, we can also use the filter() method to complete similar filtering. The filter() method will traverse all matching elements and then select the elements that meet the conditions. We can filter out tags with class names by judging whether the element has a class attribute. The code is as follows:

$("span").filter(function() {
  return !$(this).hasClass("class");
});

The above code indicates that all SPAN tags are selected, and then the tags with class attributes are filtered out, so that no tags with class names are obtained. SPAN tag for class name.

It should be noted that the above code will only select tags without class attributes. If you need to exclude other attributes, you can add multiple attributes in not() or filter(), for example:

$("span").not("[class][id]")

The above code indicates that all SPAN tags are selected and tags with class and id attributes are excluded.

In general, if we want to get tags without class names, we can use the not() or filter() method with the appropriate attribute selector. At the same time, we can also use similar methods for other attributes. way to filter.

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