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Form:
1. $(":input") Find all input elements
2. $("text") Match all single-line text boxes
3. $(":passWord") Match all password boxes
4. $("radio") Matches all radio buttons
5, $("checkbox") Matches all checkboxes
6, $("submit") Matches all submit buttons
7, $("image") Matches all images Domain
8, $("button") Matches all buttons
9, $("file") Matches all files Domain
10, $("hidden") Matches all invisible elements, or elements with type hidden
1. $("#id"): Match an element based on the given ID.
2. $("dom element name"): Match all elements based on the given element name
3. $(".Class class name"): Match elements based on the given class.
4. $("*"): Match all elements.
5. $("dom element.class class name"): Select all dom elements whose class attribute is the specified class name.
6. $(".stripe tr"): Get all rows under the table element whose class attribute is stripe
Level:
1. $("ancestor descendant"): Match all under the given ancestor element Descendant elements
2. $("parent > child"): Match all child elements under the given parent element
3. $("PRev + next"): Match all elements immediately after the prev element next element
4. $("prev ~ siblings"): matches all siblings (siblings) elements after the prev element
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