How to create one-line if statements in JavaScript
November 6, 2023
One-line if statements in JavaScript are solid for concise conditional execution of code. They’re particularly good for simple conditions and actions that can be expressed neatly in a single line. We’ll go into more detail on all of this below.
What is the basic if statement?
Before diving into one-line if statements, you should know the basic if syntax:
if (condition) { // code to be executed if condition is true }
Use the one-line if without curly braces
For a single statement following the if condition, braces can be omitted:
if (condition) statement;
Employ the ternary operator for if-else
The ternary operator is the true one-liner for if-else statements:
condition ? exprIfTrue : exprIfFalse;
Combine methods or operations
Chaining methods or operations in a one-liner if statement can keep your code terse:
if (condition) doSomething().then(doSomethingElse);
Leverage short-circuit evaluation
Short-circuiting with logical operators allows if-else constructs in one line:
condition && actionIfTrue; condition || actionIfFalse;
Handle assignment within one-line if
You can assign a value based on a condition in one line:
let variable = condition ? valueIfTrue : valueIfFalse;
Use arrow functions for inline execution
Incorporate arrow functions for immediate execution within your one-liner:
if (condition) (() => { /* code block */ })();
How to handle multiple one-line if statements
When dealing with several conditions that require one-liners, ensure they remain readable:
if (condition1) action1; if (condition2) action2;
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Use one-liners in callbacks
One-liners can be effectively used within callback functions:
array.forEach(element => if (condition) action);
Know when to use if
vs. ternary operator
The ternary operator is concise but use a regular if when the condition or actions are too complex for a ternary to remain clear.
Consider one-liners for default values
A one-liner if can set a default value if one isn't already assigned:
let value = existingValue || defaultValue;
Be careful with one-liners and scope
Understand the scope of variables used in one-liners to avoid reference errors:
if (condition) let scopedVariable = 'value'; // Incorrect, `let` has block scope
Remember operator precedence
When using logical operators in one-liners, keep operator precedence in mind to avoid unexpected results:
if (condition1 && condition2 || condition3) action;
Avoid using one-liners for function declarations
Defining functions within one-liners can lead to readability and hoisting issues:
if (condition) function myFunc() { /* ... */ }; // Not recommended
Use one-liners with template literals
Template literals can make your one-liners more readable when dealing with strings:
if (condition) console.log(`Action was ${actionIfTrue}`);
Understand limitations with const
Remember that const
declarations cannot be used in traditional one-line if statements due to block-scoping:
if (condition) const value = 'constant'; // SyntaxError
TOC
November 6, 2023
One-line if statements in JavaScript are solid for concise conditional execution of code. They’re particularly good for simple conditions and actions that can be expressed neatly in a single line. We’ll go into more detail on all of this below.
What is the basic if statement?
Before diving into one-line if statements, you should know the basic if syntax:
if (condition) { // code to be executed if condition is true }
Use the one-line if without curly braces
For a single statement following the if condition, braces can be omitted:
if (condition) statement;
Employ the ternary operator for if-else
The ternary operator is the true one-liner for if-else statements:
condition ? exprIfTrue : exprIfFalse;
Combine methods or operations
Chaining methods or operations in a one-liner if statement can keep your code terse:
if (condition) doSomething().then(doSomethingElse);
Leverage short-circuit evaluation
Short-circuiting with logical operators allows if-else constructs in one line:
condition && actionIfTrue; condition || actionIfFalse;
Handle assignment within one-line if
You can assign a value based on a condition in one line:
let variable = condition ? valueIfTrue : valueIfFalse;
Use arrow functions for inline execution
Incorporate arrow functions for immediate execution within your one-liner:
if (condition) (() => { /* code block */ })();
How to handle multiple one-line if statements
When dealing with several conditions that require one-liners, ensure they remain readable:
if (condition1) action1; if (condition2) action2;
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Use one-liners in callbacks
One-liners can be effectively used within callback functions:
array.forEach(element => if (condition) action);
Know when to use if
vs. ternary operator
The ternary operator is concise but use a regular if when the condition or actions are too complex for a ternary to remain clear.
Consider one-liners for default values
A one-liner if can set a default value if one isn't already assigned:
let value = existingValue || defaultValue;
Be careful with one-liners and scope
Understand the scope of variables used in one-liners to avoid reference errors:
if (condition) let scopedVariable = 'value'; // Incorrect, `let` has block scope
Remember operator precedence
When using logical operators in one-liners, keep operator precedence in mind to avoid unexpected results:
if (condition1 && condition2 || condition3) action;
Avoid using one-liners for function declarations
Defining functions within one-liners can lead to readability and hoisting issues:
if (condition) function myFunc() { /* ... */ }; // Not recommended
Use one-liners with template literals
Template literals can make your one-liners more readable when dealing with strings:
if (condition) console.log(`Action was ${actionIfTrue}`);
Understand limitations with const
Remember that const
declarations cannot be used in traditional one-line if statements due to block-scoping:
if (condition) const value = 'constant'; // SyntaxError
November 6, 2023
One-line if statements in JavaScript are solid for concise conditional execution of code. They’re particularly good for simple conditions and actions that can be expressed neatly in a single line. We’ll go into more detail on all of this below.
What is the basic if statement?
Before diving into one-line if statements, you should know the basic if syntax:
if (condition) { // code to be executed if condition is true }
Use the one-line if without curly braces
For a single statement following the if condition, braces can be omitted:
if (condition) statement;
Employ the ternary operator for if-else
The ternary operator is the true one-liner for if-else statements:
condition ? exprIfTrue : exprIfFalse;
Combine methods or operations
Chaining methods or operations in a one-liner if statement can keep your code terse:
if (condition) doSomething().then(doSomethingElse);
Leverage short-circuit evaluation
Short-circuiting with logical operators allows if-else constructs in one line:
condition && actionIfTrue; condition || actionIfFalse;
Handle assignment within one-line if
You can assign a value based on a condition in one line:
let variable = condition ? valueIfTrue : valueIfFalse;
Use arrow functions for inline execution
Incorporate arrow functions for immediate execution within your one-liner:
if (condition) (() => { /* code block */ })();
How to handle multiple one-line if statements
When dealing with several conditions that require one-liners, ensure they remain readable:
if (condition1) action1; if (condition2) action2;
You could ship faster.
Imagine the time you'd save if you never had to build another internal tool, write a SQL report, or manage another admin panel again. Basedash is built by internal tool builders, for internal tool builders. Our mission is to change the way developers work, so you can focus on building your product.
Use one-liners in callbacks
One-liners can be effectively used within callback functions:
array.forEach(element => if (condition) action);
Know when to use if
vs. ternary operator
The ternary operator is concise but use a regular if when the condition or actions are too complex for a ternary to remain clear.
Consider one-liners for default values
A one-liner if can set a default value if one isn't already assigned:
let value = existingValue || defaultValue;
Be careful with one-liners and scope
Understand the scope of variables used in one-liners to avoid reference errors:
if (condition) let scopedVariable = 'value'; // Incorrect, `let` has block scope
Remember operator precedence
When using logical operators in one-liners, keep operator precedence in mind to avoid unexpected results:
if (condition1 && condition2 || condition3) action;
Avoid using one-liners for function declarations
Defining functions within one-liners can lead to readability and hoisting issues:
if (condition) function myFunc() { /* ... */ }; // Not recommended
Use one-liners with template literals
Template literals can make your one-liners more readable when dealing with strings:
if (condition) console.log(`Action was ${actionIfTrue}`);
Understand limitations with const
Remember that const
declarations cannot be used in traditional one-line if statements due to block-scoping:
if (condition) const value = 'constant'; // SyntaxError
What is Basedash?
What is Basedash?
What is Basedash?
Ship faster, worry less with Basedash
Ship faster, worry less with Basedash
Ship faster, worry less with Basedash
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
You're busy enough with product work to be weighed down building, maintaining, scoping and developing internal apps and admin panels. Forget all of that, and give your team the admin panel that you don't have to build. Launch in less time than it takes to run a standup.
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Edit data, create records, oversee how your product is running without the need to build or manage custom software.
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