no-cond-assign
Recommended
Disallows the use of the assignment operator, =
, in conditional statements.
Disallows the use of the assignment operator, =
, in conditional statements.
Use of the assignment operator within a conditional statement is often the
result of mistyping the equality operator, ==
. If an assignment within a
conditional statement is required then this rule allows it by wrapping the
assignment in parentheses.
Invalid:
let x;
if (x = 0) {
let b = 1;
}
function setHeight(someNode) {
do {
someNode.height = "100px";
} while (someNode = someNode.parentNode);
}
Valid:
let x;
if (x === 0) {
let b = 1;
}
function setHeight(someNode) {
do {
someNode.height = "100px";
} while ((someNode = someNode.parentNode));
}