Adjust the z-index of elements by clicking on a different element

Thank you in advance for any help or advice, and please excuse my imperfect English :)

I currently have an HTML element like this:

<a id="menu-click" onclick="$('#menu-left').slideToggle('fast');return false;"></a>

Clicking on this element opens a menu that slides down, which works fine. However, due to the presence of draggable boxes on the page, this menu can slide under them. My goal is to increase the z-index value by 1 of the highest z-index element on the page after clicking on "menu-click." This functionality should also apply to other similar elements.

I have already implemented a jQuery function for the draggable boxes, and it functions correctly. However, I am unsure how to create a function for elements that open after clicking on another element.

Below is the function I am using for the boxes:

$(function() {
    var c = [
    "#box1", 
    "#box2", 
    "#box3", 
    "#box4"
    ];
    var boxes = c.join(", ");
    // Set up mousedown handlers for each box
    $(boxes).mousedown(function() {
        var el = $(this), // The box that was clicked
            max = 0;

    // Find the highest z-index
    $(boxes).each(function() {
        // Find the current z-index value
        var z = parseInt( $( this ).css( "z-index" ), 10 );
        // Keep either the current max, or the current z-index, whichever is higher
        max = Math.max( max, z );
    });

    // Set the box that was clicked to the highest z-index plus one
    el.css("z-index", max + 1 );
    });
});

Answer №1

The solution lies within this code snippet.

$(function() {
var colors = [
"#redBox", 
"#blueBox", 
"#greenBox", 
"#yellowBox"
];
var coloredBoxes = colors.join(", ");
// Add mousedown event handlers for each colored box
$(coloredBoxes).mousedown(function() {
    var element = $(this), // The box that was clicked
        highestZIndex = 0;

// Find the highest z-index among all boxes
$(coloredBoxes).each(function() {
     $( this ).css( "z-index" , 10); //assign initial value and retrieve it
    // Get the current z-index value
    var zIndexValue = parseInt( $( this ).css( "z-index" )); //get updated z-index
    // Keep track of the maximum z-index found so far
    highestZIndex = Math.max( highestZIndex, zIndexValue );
});

// Set the z-index of the clicked box to be one higher than the highest z-index
element.css("z-index", highestZIndex + 1);
});

});

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