javascript: is a pseudo-protocol, other pseudo-protocols include mail: tel: file: and so on.
<a id="jsPswEdit" class="set-item" href="javascript:;">修改密码</a>javascript: means to execute a piece of JavaScript code when the <a> default action is triggered, and javascript :; means to execute nothing, so that when you click <a>, nothing happens.
Generally in this case, an event callback will be bound to <a> to execute the business, such as:
document.getElementById('jsPswEdit').addEventListener('click', function(e) {
e.preventDefault();
// 当<a>触发click时，处理业务
}, false);href = "javascript :;" is the default behavior of removing the a tag, which is the same as href = "javascript: void (0)"
void is an operator in JavaScript, and void (0) means doing nothing.
Other ways to prevent page jumps:
1、<a href="#" >test</a>；
Click the link, the page scrolls to the top of the page by default, but you can add οnclick = "return false" to prevent scrolling to the top of the page.
2、<a href="####" >test</a>；
Use 2 to 4 #, mostly see "####", there are other "#all" and so on. A meaningless label is specified without any processing.
3、<a href="javascript：void(0);" >test</a>；
javascript: void (0) indicates a dead link and executes an empty event.
