Home Web Front-end CSS Tutorial How to Efficiently Determine the Height of Hidden Elements in jQuery 1.4.2?

How to Efficiently Determine the Height of Hidden Elements in jQuery 1.4.2?

Dec 16, 2024 pm 09:05 PM

How to Efficiently Determine the Height of Hidden Elements in jQuery 1.4.2?

Determining Height of Concealed Elements with jQuery

When encountering hidden elements within a hidden parent element, retrieving their height conventionally involves revealing the parent, obtaining the element's height, and then hiding the parent again. This process can appear inefficient.

Potential Solution for jQuery 1.4.2 Users

For jQuery 1.4.2 users, the following approach offers an alternative to the traditional method:

var previousCss = $("#myDiv").attr("style");

$("#myDiv").css({
    position:   'absolute', // Optional if #myDiv is already absolute
    visibility: 'hidden',
    display:    'block'
});

optionHeight = $("#myDiv").height();

$("#myDiv").attr("style", previousCss ? previousCss : "");
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By temporarily modifying the element's style attributes, we render it visible but non-displayable. This allows us to retrieve the element's height while maintaining the illusion of concealment. Once the height is captured, we revert the CSS style to its original state.

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