仅执行一次jquery动画

Question

I've the following function:

$('.link1').click(function(){
    $("#div2").slideUp(function(){$("#div1").slideToggle();});
    $('html, body').animate({scrollTop: '600px'}, 800);
});

It toggles a div and scroll the page down. The problem is that everytime the user toggles the page scroll down again...how could I run this animate function only at first click?

Answer 1

Use a flag or set a data attribute to make sure the scrolling animation only occurs on the first click.

var flag=true;

$('.link1').click(function(){
    $("#div2").slideUp(function(){$("#div1").slideToggle();});
    if (flag) {
        $('html, body').animate({scrollTop: '600px'}, 800);
        flag = false;
    }
});

I'm guessing #div2 should still toggle, but that it just should'nt scroll on every click?

Answer 2

jQuery .one() http://api.jquery.com/one/

$('.link1').one( 'click', function(){
    $("#div2").slideUp(function(){$("#div1").slideToggle();});
    $('html, body').animate({scrollTop: '600px'}, 800);
});

Answer 3

use the .one function to bind an event that fires only once.

$('.link1').one('click', function(){
    $("#div2").slideUp(function(){$("#div1").slideToggle();});
    $('html, body').animate({scrollTop: '600px'}, 800);
});

Answer 4

The following works with JQuery.

The CSS used:

.cpos {
    position: relative;
    top: -1.65em;
    left: 1.8em;
}

The JQuery used:

var p=null; /* Initialize variable p. */
p=$("b").detach(); /* Detach every possible <b>b</b>-tags. */
var p=$("<b>Console loaded!</b>").addClass("cpos"); /* Do anything, like adding class. */
p.appendTo("#container"); /* Append new data to the anchor container. */

Maybe you could use this for reference when animating. ;)

Answer 5

您可以解除处理程序末尾的单击处理程序，以便它永远不会再次触发：

$('.link1').off('click');

Answer 6

Use a flag

var noRun = 0
$('.link1').click(function(){
    if(noRun==1) {
      return
     }
     noRun = 1  
    $("#div2").slideUp(function(){$("#div1").slideToggle();});
    $('html, body').animate({scrollTop: '600px'}, 800);
});

Answer 7

You can save a simple "token" to check if is the first time that click is fired in this way:

$('.link1').click(function(){ 
    if(!$(this).data('isFirstTime')) {
        $("#div2").slideUp(function(){$("#div1").slideToggle();}); 
        $('html, body').animate({scrollTop: '600px'}, 800); 
        $(this).data('isFirstTime', true);
    }
}); 

This should prevent further click

Answer 8

This should do it

(function(){
    var first=true;
    $('.link1').click(function(){
        if (first){
            first=false;
            $("#div2").slideUp(function(){$("#div1").slideToggle();});
            $('html, body').animate({scrollTop: '600px'}, 800);
        }
    });
})();