Introduction To JavaScript - Created By Brandon Eich

What Is JavaScript?

• JavaScript is a high-level un-typed and interpreted programming language.

• Despite some naming, synthetic and standard library similarities, JavaScript and Java are otherwise unrelated.

History of JavaScript:

• JavaScript was created in 10 days in May 1995 by Brandon Eich then working at Netscape and now of Mozilla.

• The original name of JavaScript was Mocha (a name chosen by the founder of Netscape).

• In September 1995 name changed to live script.

• Again in December 1995 name change to JavaScript.

Why JavaScript?

• JavaScript is used in web pages to add functionality validate forms communicating with the server and read-write HTML elements.

• JavaScript is a client side scripting language. 

JavaScript interpreter:

• As a browser goes through JavaScript, it to a special program called interpreter which converts the JavaScript to the machine code your computer understands.

• Browsers come equipped with JavaScript interpreters.

Where to write code?

• In the same HTML file.

• In a separate file that can be embedded into HTML file.

In HTML file:
<script type="text/javascript">
....
....
</script> 

In External file:
External script cannot contain the <script></script> tags!. 

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