jquery value inequality sign

jQuery Not Equal is a very practical jQuery selector that allows developers to filter out the desired elements based on different conditions, making development more efficient and flexible. Using the inequality sign to filter elements in jQuery avoids the tedious process of selecting and excluding elements individually, making the code leaner and more readable. This article will introduce you to the jQuery value inequality selector, how to use it in the actual development process and what to pay attention to.

1. jQuery value inequality selector syntax and structure

In jQuery, the value inequality selector uses the same syntax as other selectors, and the syntax structure is as follows:

$("元素、类或 ID 选择器 [!|=]")   // 单个值不等于
$("元素、类或 ID 选择器 :not()") // 复合值不等于

Among them, [!|=] represents the single-not operator, and :not() represents the multiple-not operator. These operators need to follow the selector name, and use square brackets or parentheses to enclose the operator and its parameters.

2. Application of jQuery value inequality selector

In actual development, we often need to filter out elements that meet the requirements based on certain conditions. The jQuery value inequality selector can filter the elements we want by specifying some conditions.

1. The single value is not equal to the selector

In jQuery, you can use the single value is not equal to the selector to select elements whose value is not equal to the specified value. For example, if we need to select all elements with class example but not equal to another-example, we can use the following code:

$(".example[!|=another-example]")

The above code will select All elements with class example and not equal to another-example.

2. Multiple values ​​are not equal to the selector

If you need to select an element whose attribute value is not equal to multiple values, you need to use the multiple values ​​​​not equal to selector. You can use the :not pseudo-class to achieve this functionality. For example, if we need to select all div elements that are not red or green, we can use the following code:

$("div:not(.red, .green)")

The code above All div elements that are not red or green will be selected.

3. Precautions for jQuery value inequality selector

When using jQuery value inequality selector, you need to pay attention to the following points:

1. jQuery value inequality selector Not all browsers support it, so compatibility needs to be handled, or other selectors need to be used instead.

2. When using multiple values ​​​​not equal to the selector, multiple attributes are not supported to be excluded at the same time.

3. The jQuery value inequality selector can only be used for attribute selectors and cannot be used for pseudo-class selectors and pseudo-element selectors.

4. To avoid unexpected results, don’t forget to separate multiple selectors with commas.

5. Conclusion

Through the introduction of this article, we have learned about the syntax, application and precautions of the jQuery value inequality selector. In actual development, the correct use of the jQuery value inequality selector can facilitate developers to filter elements and improve development efficiency. In addition, some details need to be paid attention to in actual use to avoid unexpected results.

The above is the detailed content of jquery value inequality sign. For more information, please follow other related articles on the PHP Chinese website!