javascript - If scrollTop is greater than value, then do this ONLY ONCE - Stack Overflow

admin管理员组

文章数量:1432595

When user scrolls past 10px from the top, I'd like to hijack their scroll and scroll them down to certain div. After this happens once, I'd like to release the scroll to be free to scroll wherever. How do I do this?

My current code works but it won't let user to scroll freely after that initial scroll:

$(window).scroll(function() {

    //if I scroll more than 1000px...
    if($(window).scrollTop() > 10){
         $('html,body').animate({scrollTop : $('#main').offset().top}, 900, function(){
            h = 2; 
        });
    }
});

When user scrolls past 10px from the top, I'd like to hijack their scroll and scroll them down to certain div. After this happens once, I'd like to release the scroll to be free to scroll wherever. How do I do this?

My current code works but it won't let user to scroll freely after that initial scroll:

$(window).scroll(function() {

    //if I scroll more than 1000px...
    if($(window).scrollTop() > 10){
         $('html,body').animate({scrollTop : $('#main').offset().top}, 900, function(){
            h = 2; 
        });
    }
});

• javascript
• jquery

Share Improve this question Follow asked Nov 9, 2015 at 23:07 beliy333beliy333 4791212 silver badges2626 bronze badges 1

• whats the h = 2 for? – Paul Browne Commented Nov 9, 2015 at 23:09

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 3

Try:

var scrolled = false;

$(window).scroll(function() {

    //if I scroll more than 1000px...
    if($(window).scrollTop() > 10 && scrolled == false){
         $('html,body').animate({scrollTop : $('#main').offset().top}, 900, function(){
            h = 2; 
        });
      scrolled = true;
    } else if($(window).scrollTop() == 0) {
      scrolled = false;
    }
});

本文标签： javascriptIf scrollTop is greater than valuethen do this ONLY ONCEStack Overflow