如何使用jquery查找表单

$('form *')

$('form input')

$('form input[type="text"]')

$('form input[type="radio"], form input[type="checkbox"]')

$('form select')

$('form input[type="submit"], form button[type="submit"]')

$('form input[name="username"]')

$('#element-id')

$('.class-name')

$('form input[required]')