jquery waypoints fire once

问题:

Doing some quick work using http://imakewebthings.com/jquery-waypoints I need to do some action when the user scrolls down to area class div1 but need it only to be done once and not every time the user scrolls to that location ― only once

$('.div1').waypoint(function(direction)  {     alert(CARRY OUT MY ACTION); });

this needs to only happen on the first scroll to that section ― up or down.

回答1:

triggerOnce() is replaced with destroy(). Just add this.destroy().

$('.div1').waypoint(function(direction){     alert('CARRY OUT MY ACTION')     this.destroy() });

For more options check the API of Waypoints.

回答2:

If you pass a second parameter to the waypoint() function, you can include an object of configuration options. Setting the triggerOnce option to true will make the plugin behave the way you'd like.

$('.div1').waypoint(function(direction)  {     alert('CARRY OUT MY ACTION'); },   {      triggerOnce: true  });

回答3:

In the new API, it seems that there is no triggerOnce option anymore, but still can be used the waypoint.disable() method after the first call

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