Should not have unused variables JS-0128
Bug risk
2 months ago
—
7 months old
'filterPost' is defined but never used. Allowed unused vars must match /^_/u
48 * @param {string} text text to filter/format
49 * @return {string} html that represents the filtered text
50 */
51function filterPost(text){52 text = unemojify(text)
53 let result = htmlesc(text).replace(allregex, function (match) {
54 let out = match'filterReply' is defined but never used. Allowed unused vars must match /^_/u
78 * @param {string} text text to filter/format
79 * @return {string} html that represents the filtered text
80 */
81function filterReply(text) {82 text = htmlesc(text)
83 text = newlineify(text)
84 text = urlify(text)'server' is defined but never used. Allowed unused args must match /^_/u
30 }
31}
32
33export const setup = function (router, con, server) {34 router.get("/api/getFileIcon/*",async function(req,res){
35 let path = req.path.split("/api/getFileIcon/")[1]
36 if(path.length > 4) {'con' is defined but never used. Allowed unused args must match /^_/u
30 }
31}
32
33export const setup = function (router, con, server) {34 router.get("/api/getFileIcon/*",async function(req,res){
35 let path = req.path.split("/api/getFileIcon/")[1]
36 if(path.length > 4) {'extend' is defined but never used. Allowed unused vars must match /^_/u
12 return ret;
13}
14
15function extend(key,len) {16 let temp = []
17 let out = []
18
Description
Found variables that are declared but not used anywhere.
Unused variables are most often the result of incomplete refactoring. They can lead to confusing code and minor performance hitches.
NOTE: If you have intentionally left a variable unused, we suggest you to prefix the variable name with a _ to prevent them from being flagged by DeepSource.
Bad Practice
// Write-only variables are not considered as used.
var y = 10;
y = 5;
// A variable that modifies only itself isn't considered used.
var z = 0;
z = z + 1;
// Unused argument
(function(x) {
return 5;
})();
// Unused recursive functions also raise this issue.
function fact(n) {
if (n < 2) return 1;
return n * fact(n - 1);
}
// When a function definition destructures an array,
// unused entries from the array also cause warnings.
function getY([x, y]) {
return y;
}
Recommended
var x = 10;
alert(x);
((arg1) => {
return arg1;
})();
let myFunc;
myFunc = (n) => {
// this is legal
if (n < 0) myFunc();
};
// this is also considered legal
console.log(declaredLater);
var declaredLater;
// Only the second argument from the descructured array is used.
function getY([, y]) {
return y;
}