Triggering a jQuery event when a CSS property is altered

My current approach involves utilizing the .animate method to shift a div 100px to the right in just 1 second.

Essentially, this means moving by 1px every 10ms. I am now exploring whether there exists an event that could be triggered after each individual pixel movement, or perhaps one that activates following every 10-20px of motion.

The scenario depicted above is quite straightforward; nevertheless, my aim is to monitor the positioning changes within the left: property of numerous elements and determine when they should be displayed based on their visibility within the browser's bounds.

javascriptjquerycssevents

Answer №1

If you're looking to add custom animation types or modify animations as they occur, the step function in jQuery's animate method is exactly what you need. Scroll down a bit on the documentation page to find it.

The newer version of .animate() includes a step option - a callback function that gets executed at each step of the animation process. This feature can be used to create unique animation effects or adjust the animation on the fly. The function takes two arguments (now and fx), with 'this' referring to the animated DOM element.

$(something).animate({
  ..... settings...
},
{
  {
  step: function(now, fx) {
    // Your custom code here
  }
});

Answer №2

Have you taken the time to review the API documentation for animate()?

Some useful examples of utilizing the step function can be found in these resources:

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