Can the href attribute of the a tag be omitted in the html page?

I use a group of a tags for tab switching. If I add href="#" to the a tag, clicking the a tag will always jump to the top. If I add javascript:void(0), I feel that sometimes the click response speed is faster. It slows down and sometimes freezes. I would like to ask you what will be the impact if href is not added to the a tag? Is it inconsistent with semantics or will it have any impact on optimization or something?

In fact, if href="#", you can prevent the default link jump behavior through the preventDefault() method
If you use jQuery, you can

$("#myLink").click(function () {    // Your event handlers here
    return false;
});

A has no href and no tabindex Will not be tabbed to HTML 4. It considers a without href (but with name) to be a named anchor. HTML 5 considers a without href to be a link placeholder (the behavior is the same for browsers anyway

javascript:void(0) It's really just your feeling. If you are so confused about href, why do you have to use the a tag?

Of course you can not add it, otherwise it will not be a hyperlink. Yes. Some unique properties of hyperlinks are lost. For example, the href of the css style

a tag can actually be written or not. If you want it not to jump, the method is as follows:
1.href="javascript: viod(0)"; or href="javascript:;"
2. In its click event settings, such as

a.onclick = function(){    return false;
}

3. The bottom line is: why does it jump after clicking? Because this is a The default behavior of the tag can be achieved by preventing its default behavior. If the a tag does not add the href attribute, it will not be able to navigate. In the design of the website, the a tag will be used in many cases. To do other things, such as buttons, it depends on how you like to use them.

You can leave it out, but some browser mouse styles don’t have gestures, and there seems to be a problem under IE6. , forget to add href="javascript:void(0);"

You don’t have to add it. But if you don’t add href, you can’t jump to the page, and there are no gestures

## If #a is not labeled, it will be similar to span... and then it cannot jump. If you want to prevent jumping to the top, you can use javascript event delivery to add an event for click in the a attribute, such as 45a0b76ff6263e23c39a3a694e46f3db Then write function a(event){ event.preventDefault(); } in the script

Click the a tag to prevent it from jumping to the top, or add javascript:void(0) To prevent feeling stuck, you can write href="

"

.

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