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110The && Operator in JSX: Basic Syntax
111Why && Works: Truthy/Falsy Evaluation
112The Zero Trap: 0 Renders Visibly
113Safe Boolean Coercion: !! Pattern
114Explicit Comparisons Over Implicit Truthiness
115When && is Perfect: Show/Hide Based on Boolean Flags
116The null/undefined Safety: They Render Nothing
117Readability First: When && Becomes Too Clever
118The Ternary Operator for If-Else in JSX
119When Ternaries Beat Logical &&
120Inline Ternaries for Component Selection
121Ternaries for Attribute Values
122Nesting Ternaries: When It's Acceptable
123Ternary with null for One-Sided Conditionals
124Extracting Ternaries to Variables for Clarity
125When Simple Conditionals Break Down
126Extract Logic to Variables Before JSX
127Using if/else Before Return
128Early Returns for Guard Clauses
129Immediately Invoked Function Expressions (IIFEs) in JSX
130Switch Statements in IIFEs
131Object Lookup Patterns for Mapping
132Combining Variables and Inline Conditionals
133When to Extract to Helper Functions
134Falsy Values Rendering: 0, NaN, and Empty Strings
135Nested Ternaries: When Readability Breaks
136Boolean Coercion Mistakes with &&
137Overusing Inline Logic: Extracting to Variables
138The Anti-Pattern of Conditional Hooks
139Style-Based Hiding vs Conditional Rendering

110The && Operator in JSX: Basic Syntax
111Why && Works: Truthy/Falsy Evaluation
112The Zero Trap: 0 Renders Visibly
113Safe Boolean Coercion: !! Pattern
114Explicit Comparisons Over Implicit Truthiness
115When && is Perfect: Show/Hide Based on Boolean Flags
116The null/undefined Safety: They Render Nothing
117Readability First: When && Becomes Too Clever
118The Ternary Operator for If-Else in JSX
119When Ternaries Beat Logical &&
120Inline Ternaries for Component Selection
121Ternaries for Attribute Values
122Nesting Ternaries: When It's Acceptable
123Ternary with null for One-Sided Conditionals
124Extracting Ternaries to Variables for Clarity
125When Simple Conditionals Break Down
126Extract Logic to Variables Before JSX
127Using if/else Before Return
128Early Returns for Guard Clauses
129Immediately Invoked Function Expressions (IIFEs) in JSX
130Switch Statements in IIFEs
131Object Lookup Patterns for Mapping
132Combining Variables and Inline Conditionals
133When to Extract to Helper Functions
134Falsy Values Rendering: 0, NaN, and Empty Strings
135Nested Ternaries: When Readability Breaks
136Boolean Coercion Mistakes with &&
137Overusing Inline Logic: Extracting to Variables
138The Anti-Pattern of Conditional Hooks
139Style-Based Hiding vs Conditional Rendering

Lesson 134 of 2,396·4. Conditional Rendering in JSXPro lesson

Falsy Values Rendering: 0, NaN, and Empty Strings

Understand which falsy values render to the DOM and cause bugs with && operators, especially `0` from `.length`.

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