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Example 2 : What are the elements in the line ? What are the block level elements ? Example 3 : What are the three layers of the front page , What are they ? What is the function ? Example 4 : On the label title With alt What is the difference between attributes ? Example 5 : javascript of typeof Which data types are returned Example 6 : javascript How to Number and string conversion Example 7 : How to hide an element
Element selector
id Selector corresponding # Symbol class Selector corresponding . Symbol See details CSS Selector
Block level elements ：div p h1 h2 h3 h4 form ul
Inline elements : a b i span input select
Structure ( Content ) layer Html
Presentation layer CSS Behavior layer js
Alt When the picture is not displayed Use words to represent .
Title Provide information for this property
Convert numbers to strings ：
toString() Convert string to number ： new Number() More type conversions , Please refer to javascript Type conversion
CSS Hide elements There are two ways
display:none; ( No place ) visibility:hidden; ( Take a place ) JQuery Hide elements in a way Way $(selector).hide()
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Q & A area
2021-07-21
These are the interview questions for many years
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2020-02-20
When will the webmaster update the interview questions /
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2018-08-24
Is there any omission
2018-05-04
About hiding
2018-01-31
If only there were more interview questions ~
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