How might I use jQuery to show the first 8 elements?

I have a list of items (<li>), som开发者_如何转开发ething like 50 of them, and I want to show only the first 8 items... How can I do that?

$("li:lt(8)").show();

This selects the first 8 li elements. The :li selects elements with an index less than the chosen number.

$('li:gt(7)').hide();

You use 7 because it's a zero based index.

Use the less-than selector to select all list items with indexes less than 8 (index 8 is the ninth list item). Then show them:

$("#mylist li:lt(8)").show();

(assumes your list - ol or ul - has an id of mylist; adjust accordingly)

You might need to do this in two steps, if some list items are initially visible:

$("#mylist li") // select all list items
  .hide() // hide them
  .filter("li:lt(8)") // now select just the first eight
  .show(); // ...and show them.

(actually, this is over-kill unless some items are shown and some are hidden - if you know for a fact that all items are initially visible, you can use the greater-than selector to simply hide items with index 8 and above - as Corey demonstrates)

$("li:lt(8)") the :lt selects all li elements with index less than 8