jquery setting a tag fails

In web page production, hyperlinks are often used to jump to pages or link to external web pages. And because the most commonly used tag for hyperlinks is the tag, we usually use the tag when implementing page jumps or links. But sometimes we need to temporarily disable the jump function of a certain tag. At this time, we need to set the tag to invalid. This article describes how to use jQuery to invalidate the tag.

jQuery is a fast, compact, feature-rich JavaScript library that can greatly simplify JavaScript programming work and make JavaScript development easier. The jQuery library supports multiple functions such as selectors, event handling, style operations, and animation effects, and has become one of the most commonly used JavaScript libraries in web development.

In jQuery, you can use the .attr() function to get or set the attribute value of an HTML element, and you can also use the .prop() function to get or set the attribute or attribute value of an HTML element. The disable attribute of the tag does not exist by default, and not all browsers support the disabled attribute, so we need to use some techniques to invalidate the tag.

First of all, we need to know that the href attribute of the tag is used to specify the target address of the link. If we remove the href attribute or set its value to an empty string, we can prevent # Jump function of ## tag. The code is as follows:

$('a').removeAttr('href');//移除所有<a>标签的href属性

Use the above code to remove the href attribute of all

tags in the page, thereby disabling the jump function of the tag.

In addition to removing the href attribute, we can also set the href attribute of the

tag to "javascript:void(0);", which can also prevent the jump function of the tag. The code is as follows:

$('a').attr('href','javascript:void(0);');//将所有<a>标签的href属性设为javascript:void(0);

Using the above code, you can set the href attribute of all

tags to "javascript:void(0);", thereby disabling the jump function of the tag.

In addition to removing the href attribute and changing the href attribute, we can also use jQuery's event handling function to disable the jump function of the

tag. We can use the preventDefault() function in JavaScript to prevent the default behavior of the tag (that is, the jump operation) when clicking the tag. The code is as follows:

$('a').click(function(event){
  event.preventDefault();//阻止<a>标签的默认行为
});

Use the above code to add a click event handler function for all

tags in the page, in which the preventDefault() function is called to prevent the default behavior of the tag, thereby prohibiting # Jump function of ## tag. In summary, the above three methods can all achieve the invalidation of the

tag. Developers can choose which method to use based on their own needs and actual conditions. In actual development, we can choose different methods to invalidate the

tag for different tags. It should be noted that in some cases, disabling the jump function of the

tag may affect the user experience. If it is not absolutely necessary, it is recommended not to disable the jump function of the

tag at will.

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