jquery's hover is canceled and then executed

In web design, jQuery in the JavaScript library is often used to achieve various effects. Among them, the hover event is a frequently used event, which can implement special effects when the mouse is hovering. However, when implementing certain special effects, we need to cancel the previous operation in the hover event and then perform a new operation. So, how to cancel and then execute hover in jQuery?

1. Basic usage of hover events

In jQuery, using hover events is very simple. You only need to use the following code:

$('selector').hover(function() {
  // 如果想要执行的操作
}, function() {
  // 如果想要取消的操作
});

Among them, selector means to bind The first function represents the action to be performed when the mouse hovers over the element, and the second function represents the action to be performed when the mouse moves out of the element.

2. Execute after canceling hover

Sometimes, we need to cancel the previous operation in the hover event and perform a new operation afterwards. A common scenario is that when the user moves the mouse quickly, they need to cancel the previous operation and then perform a new operation. At this time, we can use the stop() and delay() methods in jQuery to achieve this.

The stop() method is used to stop the currently ongoing animation or effect, and the delay() method is used to delay the execution of the operation. The combination of these two methods can achieve the effect of executing the operation after the hover is cancelled.

The following is a code example:

var timeoutId;
$('selector').hover(function() {
  // 如果想要执行的操作
  $(this).stop().animate({ width: '100px' }, 500);
  clearTimeout(timeoutId);
}, function() {
  // 如果想要取消的操作
  timeoutId = setTimeout(function() {
    $(this).stop().animate({ width: '50px' }, 500);
  }, 500);
});

In this code, we use the timeoutId variable to save the timer ID. When the mouse moves out of the element, set a timer to perform the reduction after 500ms. operation, if the mouse enters the element again during this period, the timer is cleared and the zoom operation is performed.

3. Summary

To implement the cancellation and re-execution of hover events in jQuery, you need to use a combination of stop() and delay() methods, which can ensure normal cancellation when the mouse moves quickly. the previous operation, and perform the new operation correctly afterwards. This method is very common in web design and requires more accumulation and practice.

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