jquery - What does putting a javascript function inside a '$()' do? -

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i'm learning ajax right , jquery function being used submit form wrapped inside $( function() { } ) so. do?

$(function() {     $('.error').hide();     $(".button").click(function() {         // validate , process form here     } });

this shortcut provided jquery running code on page ready. equivalent to:

$(document).ready(function() {     ... });

jquery call function when page ready manipulated.

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