This concise jQuery code snippet is used to detect whether the user scrolls to the bottom of the div element and triggers an event. This is useful in need of knowing whether the user scrolls to the bottom (overflow: scroll), for example, to check if the user has read the terms and conditions in the registration form.

$(document).ready(function(){
    $('div').bind('scroll', chk_scroll);
});

function chk_scroll(e){
    var elem = $(e.currentTarget);
    if (elem[0].scrollHeight - elem.scrollTop() == elem.outerHeight()){
        console.log("已滾動(dòng)到底部");
    }
}

Other methods:

// scrollTop 指的是滾動(dòng)條的頂部位置，等于 scrollHeight - offsetHeight
if (obj.scrollTop == (obj.scrollHeight - obj.offsetHeight)) { }

jQuery scroll-related FAQs (FAQs)

How to use jQuery to detect if the user scrolls to the bottom of the div element?

Use jQuery to detect whether the user scrolls to the bottom of the div element, you can use the scroll event with scrollTop, scrollHeight attributes. scroll Event fires when the user scrolls the div element. scrollTop attribute returns the number of pixels in which the element content scrolls upward. scrollHeight The attribute returns the total height of the element in pixels, including the inner margins, but not the borders, scroll bars, or margins. By comparing these two properties, you can determine if the user has scrolled to the bottom of the div element.

and scrollTop in scrollHeight?

In jQuery, scrollTop and scrollHeight are two properties that provide information about the scroll position and height of the element. scrollTop Returns the number of pixels in which the element content scrolls upward. Returns 0 if the element is not scrolling. scrollHeight Returns the total height of the element in pixels, including the inner margins, but not the borders, scroll bars, or margins. It includes the height of content that is not visible on the screen due to overflow.

How to use jQuery to check if the user scrolls to the bottom of the page?

To use jQuery to check whether the user scrolls to the bottom of the page, you can use the scroll event with scrollTop, scrollHeight, height properties in combination. scroll Event is fired when the user scrolls the page. scrollTop attribute returns the number of pixels that the page content scrolls upward. scrollHeight attribute returns the total height of the page in pixels. The height property returns the height of the viewport. By comparing these properties, you can determine if the user has scrolled to the bottom of the page.

Can I use jQuery to detect when the user starts scrolling?

Yes, you can use jQuery to detect when the user starts scrolling. You can use the scroll event to achieve it. scroll Event fires when the user scrolls the specified element. By using this event, you can run functions or execute certain code when the user starts scrolling.

How to use jQuery to detect scrolling direction?

To use jQuery to detect scrolling direction, you can compare the current scrolling position with the previous scrolling position. If the current scroll position is greater than the previous scroll position, the user is scrolling down. If the current scroll position is smaller than the previous scroll position, the user is scrolling upward. You can store the current scroll position in a variable and update it every time the scroll event is fired.

Can I use jQuery to prevent scrolling?

Yes, you can use jQuery to prevent scrolling. You can use the scroll method in the event.preventDefault() event to achieve this. This method cancels the event if the event is cancelable, which means that the default action belonging to the event will not occur. For scroll events, the default action is scrolling, so using this method will prevent scrolling.

How to use jQuery animation to scroll?

You can use the animate method and scrollTop attribute to animate scrolling. The animate method executes a custom animation of a set of CSS properties. scrollTop Properties set or return the number of pixels to which the element content is scrolled vertically. By using them in combination, you can animate the scrolling of elements.

Can I use jQuery to scroll to a specific element?

Yes, you can use jQuery to scroll to specific elements. You can use the animate method and the offset method to achieve this. The animate method executes a custom animation of a set of CSS properties. offset method returns the coordinates of the element relative to the upper left corner of the document. By using them in combination, you can animate the scrolling of the page to specific elements.

How to use jQuery to scroll to the top of the page?

You can use the jQuery combination with the animate method and the scrollTop property to scroll to the top of the page. The animate method executes a custom animation of a set of CSS properties. scrollTop Properties set or return the number of pixels to which the element content is scrolled vertically. You can animate the scrolling of the page to the top by setting the animate property to 0 in the scrollTop method.

Can I use jQuery to detect when a user stops scrolling?

Yes, you can use jQuery to detect when the user stops scrolling. You can use the scroll event and setTimeout function to implement it. scroll Event fires when the user scrolls the specified element. setTimeout The function calls a function or calculates an expression after the specified number of milliseconds. By using them in combination, you can run functions or execute certain code when the user stops scrolling.

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