What can be done with JavaScript

JavaScript modifies the HTML

See the Pen JS modify HTML by tmarchesan (@tmarchesan) on CodePen.

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JavaScript modifies the CSS

See the Pen JS modifies CSS by tmarchesan (@tmarchesan) on CodePen.

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JavaScript uses numerous APIs in addition to the DOM and selector APIs

See the Pen function plot, starting example for section 1.4 by tmarchesan (@tmarchesan) on CodePen.

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JavaScript works with remote data

See the Pen Working with remote data by tmarchesan (@tmarchesan) on CodePen.