Initialization in variable declarations against recommended approach JS-0119
Anti-pattern
Minor
2 years ago
—
2 years old
Variable 'variable' should be initialized on declaration.
37
38function func() {
39 records.forEach((record) => {
40 let variable ;41 console.log(record.Exp_Type);
42 if( record.Exp_Type !=="-")
43 variable = record.Exp_Type;Variable 'NetProfitFB' should be initialized on declaration.
51let advance = [];
52let debts = [];
53let total2 = 0;
54let NetProfitFB ; 55
56colRecords.get().then((querySnapshot) => {
57 querySnapshot.forEach((doc) => {
Description
In JavaScript, variables can be assigned during declaration, or at any point afterwards using an assignment statement. For example, in the following code, foo is initialized during declaration, while bar is initialized later.
var foo = 1;
var bar;
if (foo) {
bar = 1;
} else {
bar = 2;
}
Bad Practice
function foo() {
var bar;
let baz;
}
Recommended
function foo() {
var bar = 1;
let baz = 2;
const qux = 3;
}