Notes on "sharp jQuery"-One Sections, sharp jquery

Notes on "sharp jQuery"-One Sections, sharp jquery

Chapter 1

1. $ is a short form of jQuery

2. You cannot use any DOM object methods in jQuery: $ ("# id"). innerHTML, $ ("# id"). checked,

You can use: $ ("#id”).html (), $ ("# id"). attr ("checked ");

3. DOM objects cannot use any method in jQuery:

Document.getelementbyid(registry.id=}.html ();

4. Convert jQuery into a DOM object:

1) var $ c = $ ("# cr ");

Var c = $ c [0] Or var c = $ c. get (0)

5. Convert the DOM into a jQuery object:

Var cr = document. getElementById ("# id ");

Var $ cr = $ (cr)

6. When jQuery conflicts with other libraries:

1) jQuery is imported after other libraries

(1) Call jQuery. noConflict (); // hand over control of variable $ to other libraries

(2) If you want to define a shortcut:

Var $ j = jQuery. noConflict ();

$ J ("# id ")

2) jQuery is imported before other libraries

Use "jQuery" directly, and use the $ () method for other libraries.

Chapter 2

1. $ (". one + div") is equivalent to $ (". one"). next ("div ");

2. $ (". one ~ Div) is equivalent to $ (". one"). nextAll ("div ");

3. PS:

1) the selector cannot contain "·", "#", "(", "]". If used, add "\" to the front.

2) When using Version 1.3.1 or later, you do not need to add @ to the front of the attribute, for example, $ ("div [title = 'test']").

3) considerations when the selector contains spaces:

$ ('. Test: Den den') [descendant selector] is different from $ ('. test: Den den') [filter selector]