The `with` statement was introduced in early JavaScript but has since been deprecated due to concerns about scope pollution and performance overhead, making it a relic of the past that should be avoided in production code.
Implicit global variables in JavaScript can cause problems like name collisions, scope pollution, security risks, and reduced code readability. To avoid these issues, use `var`, `let`, or `const` declarations, enable strict mode, and utilize a linter or code analyzer to detect and prevent implicit global variables.
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