Showing 943 of 943 total issues
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-default.active Open
.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-default.active,
- Exclude checks
Rule doesn't have all its properties in alphabetical order. Open
.bootstrap-switch input[type='radio'],
- Exclude checks
Expected (<filter-function-list> | none) but found 'progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffe6e6e6' endColorstr='#ffffffff' GradientType=0)'.</filter-function-list> Open
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffe6e6e6', endColorstr='#ffffffff', GradientType=0);
- Exclude checks
Expected an assignment or function call and instead saw an expression. Open
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
- Read upRead up
- Exclude checks
Disallow Unused Expressions (no-unused-expressions)
An unused expression which has no effect on the state of the program indicates a logic error.
For example, n + 1;
is not a syntax error, but it might be a typing mistake where a programmer meant an assignment statement n += 1;
instead.
Rule Details
This rule aims to eliminate unused expressions which have no effect on the state of the program.
This rule does not apply to function calls or constructor calls with the new
operator, because they could have side effects on the state of the program.
var i = 0;
function increment() { i += 1; }
increment(); // return value is unused, but i changed as a side effect
var nThings = 0;
function Thing() { nThings += 1; }
new Thing(); // constructed object is unused, but nThings changed as a side effect
This rule does not apply to directives (which are in the form of literal string expressions such as "use strict";
at the beginning of a script, module, or function).
Sequence expressions (those using a comma, such as a = 1, b = 2
) are always considered unused unless their return value is assigned or used in a condition evaluation, or a function call is made with the sequence expression value.
Options
This rule, in its default state, does not require any arguments. If you would like to enable one or more of the following you may pass an object with the options set as follows:
-
allowShortCircuit
set totrue
will allow you to use short circuit evaluations in your expressions (Default:false
). -
allowTernary
set totrue
will enable you to use ternary operators in your expressions similarly to short circuit evaluations (Default:false
). -
allowTaggedTemplates
set totrue
will enable you to use tagged template literals in your expressions (Default:false
).
These options allow unused expressions only if all of the code paths either directly change the state (for example, assignment statement) or could have side effects (for example, function call).
Examples of incorrect code for the default { "allowShortCircuit": false, "allowTernary": false }
options:
/*eslint no-unused-expressions: "error"*/
0
if(0) 0
{0}
f(0), {}
a && b()
a, b()
c = a, b;
a() && function namedFunctionInExpressionContext () {f();}
(function anIncompleteIIFE () {});
injectGlobal`body{ color: red; }`
Note that one or more string expression statements (with or without semi-colons) will only be considered as unused if they are not in the beginning of a script, module, or function (alone and uninterrupted by other statements). Otherwise, they will be treated as part of a "directive prologue", a section potentially usable by JavaScript engines. This includes "strict mode" directives.
"use strict";
"use asm"
"use stricter";
"use babel"
"any other strings like this in the prologue";
Examples of correct code for the default { "allowShortCircuit": false, "allowTernary": false }
options:
/*eslint no-unused-expressions: "error"*/
{} // In this context, this is a block statement, not an object literal
{myLabel: someVar} // In this context, this is a block statement with a label and expression, not an object literal
function namedFunctionDeclaration () {}
(function aGenuineIIFE () {}());
f()
a = 0
new C
delete a.b
void a
allowShortCircuit
Examples of incorrect code for the { "allowShortCircuit": true }
option:
/*eslint no-unused-expressions: ["error", { "allowShortCircuit": true }]*/
a || b
Examples of correct code for the { "allowShortCircuit": true }
option:
/*eslint no-unused-expressions: ["error", { "allowShortCircuit": true }]*/
a && b()
a() || (b = c)
allowTernary
Examples of incorrect code for the { "allowTernary": true }
option:
/*eslint no-unused-expressions: ["error", { "allowTernary": true }]*/
a ? b : 0
a ? b : c()
Examples of correct code for the { "allowTernary": true }
option:
/*eslint no-unused-expressions: ["error", { "allowTernary": true }]*/
a ? b() : c()
a ? (b = c) : d()
allowShortCircuit and allowTernary
Examples of correct code for the { "allowShortCircuit": true, "allowTernary": true }
options:
/*eslint no-unused-expressions: ["error", { "allowShortCircuit": true, "allowTernary": true }]*/
a ? b() || (c = d) : e()
allowTaggedTemplates
Examples of incorrect code for the { "allowTaggedTemplates": true }
option:
/*eslint no-unused-expressions: ["error", { "allowTaggedTemplates": true }]*/
`some untagged template string`;
Examples of correct code for the { "allowTaggedTemplates": true }
option:
/*eslint no-unused-expressions: ["error", { "allowTaggedTemplates": true }]*/
tag`some tagged template string`;
Source: http://eslint.org/docs/rules/
Using width with border-left can sometimes make elements larger than you expect. Open
border-left: 1px solid #cccccc;
- Exclude checks
Rule doesn't have all its properties in alphabetical order. Open
.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-default:hover,
- Exclude checks
Rename has_been_updated_recently?
to been_updated_recently?
. (https://github.com/bbatsov/ruby-style-guide#bool-methods-qmark) Open
def has_been_updated_recently?
- Read upRead up
- Exclude checks
This cop makes sure that predicates are named properly.
Example:
# bad
def is_even?(value)
end
# good
def even?(value)
end
# bad
def has_value?
end
# good
def value?
end
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-default:active Open
.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-default:active,
- Exclude checks
Property with star prefix found. Open
*background-color: #f2f2f2;
- Exclude checks
Expected end of value but found ' '. Open
background-color: #e6e6e6 \9;
- Exclude checks
Using width with border-right can sometimes make elements larger than you expect. Open
border-right: 1px solid #cccccc;
- Exclude checks
Don't use IDs in selectors. Open
#preview_email {
- Exclude checks
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:hover Open
.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:hover,
- Exclude checks
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:hover Open
.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:hover,
- Exclude checks
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.disabled Open
.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.disabled,
- Exclude checks
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.disabled Open
.bootstrap-switch .bootstrap-switch-handle-on.bootstrap-switch-danger.disabled,
- Exclude checks
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-default.disabled Open
.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-default.disabled,
- Exclude checks
Rule doesn't have all its properties in alphabetical order. Open
.bootstrap-switch .bootstrap-switch-handle-on {
- Exclude checks
Use &&
instead of and
. (https://github.com/bbatsov/ruby-style-guide#no-and-or-or) Open
latitude.blank? and longitude.blank?
- Read upRead up
- Exclude checks
This cop checks for uses of and
and or
, and suggests using &&
and
|| instead
. It can be configured to check only in conditions, or in
all contexts.
Example: EnforcedStyle: always (default)
# bad
foo.save and return
# bad
if foo and bar
end
# good
foo.save && return
# good
if foo && bar
end
Example: EnforcedStyle: conditionals
# bad
if foo and bar
end
# good
foo.save && return
# good
foo.save and return
# good
if foo && bar
end
Adjoining classes: .bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:focus Open
.bootstrap-switch .bootstrap-switch-handle-off.bootstrap-switch-danger:focus,
- Exclude checks