Utilizing jQuery variables to manage various events simultaneously

Is it possible to set a variable that can be accessed and utilized in various events like mouseout, mouseenter, click, etc.?

The code snippet looks something like this:

   $('a div')

    // Get the width and height of the image
    //var $img_width = $(this).children('img').width();
    //var $img_height = $(this).children('img').height();

    .mouseenter(function() {
        alert($img_width)

    })
    .mouseleave(function() { // Animate the image back to its original size
        alert($img_width);
    })
    .each(function(index) {
        alert($img_width);
    });

Answer №1

Here is a suggestion for event handling using jQuery. By using the mouseover and mouseout functions, you can easily perform actions when hovering over or moving away from an element. When hovering over a picture, you can use $(this) to refer to it, allowing you to manipulate the specified element within this live handler.

jQuery's live method can handle various other events as well, so feel free to explore more options. http://api.jquery.com/live/

$('a div').live('mouseover mouseout', function(event) {

    var $img_width = $(this).children('img').width();

    if(event.type == 'mouseover'){
        //do something on mouse over
    }
    else if(event.type == 'mouseout'){
        //do something on mouseout
    }

    alert($img_width);

});

EDIT Instead of checking for children within the div, consider referencing the img directly in the event handler. This way, you can retrieve the width without having to traverse the DOM.

$('a div img').live('mouseover mouseout', function(event) {

Best of luck!

Answer №2

To take advantage of the closure created by .each(), you can rearrange your code like this:

$("a div").each(function(index) {
  var $img_width = $(this).children('img').width();
  var $img_height = $(this).children('img').height();

  $(this).mouseenter(function() {
    alert($img_width)
  }).mouseleave(function() {
    alert($img_width);
  });

  alert($img_width);
});

Try it out here.

This sets the variables for each matched element, ensuring that the bound functions return the specific value for each <div>. Keep in mind that a <div> (or any block element) isn't a valid child of an <a> tag, so review your markup if needed. ​

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