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Boolean data types
Variables that contain logical data that can be one of two values, such as True/False or Yes/No
Values that are common to a browser (arrays, dates, strings, etc) which neither depend on nor belong to another object.
An HTML tag that identifies a section of HTML code using the id attribute so content of the tag can be set or defined by the use of the innerHTML property.
A programming language that responds to events, such as a Web page loading or a user clicking a Submit button
The variable is available for use anywhere inside the HTML file Web page. Must be declared in the <script> section before any of the user-defined functions.
An event-driven, object-based programming language that provides various types of functionality to Web pages, such as the ability to interact with the user.
object instance variable
Location of a byte in a string of bytes, as defined by its position relative to the first byte in that string.