
JavaScript – Introduction and Script Placement
While HTML is the page structure, and CSS the page design, JavaScript can be considered the page “action”, as it is often used to interact with the user.
While HTML is the page structure, and CSS the page design, JavaScript can be considered the page “action”, as it is often used to interact with the user.
JavaScript comments are used to create notes about what the code block does and how it works, and can also be used to temporarily prevent code execution.
JavaScript syntax is the set of rules concerning how the code blocks should be constructed for proper execution.
JavaScript can be used to change data on the page, rewrite the entire page, create popup alerts, write to the console for testing, or print the page.
JavaScript has numerous operators that can be used, in part, to do mathematical calculations, assign values to variables, and compare values.
In JavaScript, variables are used to store data that will be used in multiple places. This allows the data to be kept in one place for ease of change.
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