jQuery has :nth-child() Selector that can be used khổng lồ select all nth-childs of their parent & apply the style to lớn those elements.

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We can pass similar parameters as we pass in CSS. Such as the index of the child element child (starting with 1) or the string odd/even, or even an equation for eg. :nth-child(even), :nth-child(2n).

jQuery strictly implements :nth- selectors directly from the CSS specification, so the value of n is “1-indexed”, which means that the counting of child elements starts at 1.

Other jQuery methods like .first() or .eq() follows “0-indexed” counting that is derived from JavaScript.

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This is how we can select the first element:

...$( "li:nth-child(1)");...With :nth-child(n), all children are counted và the specified element is selected only if it matches the selector attached khổng lồ the pseudo-class.

Examples:

Find the second li in each matched ul và change the color.

Credit: jQuery Docs

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