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Javascript Advanced Programming (3rd edition)-No. 01 Chapter

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Author: User
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2017-05-10JS Introduction

Invented by a man named "Not hard to be". The popularity of JS is due to the relationship between Ajax.

JS is divided into three parts:
    • Core: ECMAScript
    • Document Object Model: DOM
    • Browser Object Model: BOM
Core: ECMAScript

He has nothing to do with the browser, just the syntax, the type, the keywords or something.

Document Object Model: DOM

Dom is to think of HTML as a tree structure so that you can manipulate them through the API.
Html:

<html>  <head>    <title>Sample Page</title>  </head>  <body>    <p>Hello world!</P>  </body></html>

Dom Tree:

Browser Object Model: BOM

Used to control what the browser displays outside of the page, such as:

    • Pop up a new window
    • Move, close a window
    • Information about the current page
    • Resolution of the user's display

The BOM has no standards, and each browser has its own DOM functionality.

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Javascript Advanced Programming (3rd edition)-No. 01 Chapter

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