Curly braces can be omitted from a one-line block, such as with an if statement or for loop, but doing so can be
misleading and induce bugs.
This rule raises an issue when the whitespacing of the lines after a one line block indicates an intent to include those lines in the block, but
the omission of curly braces means the lines will be unconditionally executed once.
Note that this rule considers tab characters to be equivalent to 1 space. If you mix spaces and tabs you will sometimes see issues in code which
looks fine in your editor but is confusing when you change the size of tabs.
Noncompliant Code Example
if (condition)
firstActionInBlock();
secondAction(); // Noncompliant; executed unconditionally
thirdAction();
if (condition) firstActionInBlock(); secondAction(); // Noncompliant; secondAction executed unconditionally
if (condition) firstActionInBlock(); // Noncompliant
secondAction(); // Executed unconditionally
if (condition); secondAction(); // Noncompliant; secondAction executed unconditionally
let str = undefined;
for (let i = 0; i < array.length; i++)
str = array[i];
doTheThing(str); // Noncompliant; executed only on last array element
Compliant Solution
if (condition) {
firstActionInBlock();
secondAction();
}
thirdAction();
let str = undefined;
for (let i = 0; i < array.length; i++) {
str = array[i];
doTheThing(str);
}
See
