Function addons
has 26 lines of code (exceeds 25 allowed). Consider refactoring. Open
export function addons(options: PresetOptions = {}) {
const checkInstalled = (addon: string, main: any) => {
const existingAddon = main.addons?.find((entry: string | { name: string }) => {
const name = typeof entry === 'string' ? entry : entry.name;
return name?.startsWith(addon);
Shadowed name: 'main' Open
const checkInstalled = (addon: string, main: any) => {
- Read upRead up
- Exclude checks
Rule: no-shadowed-variable
Disallows shadowing variable declarations.
Rationale
When a variable in a local scope and a variable in the containing scope have the same name, shadowing occurs. Shadowing makes it impossible to access the variable in the containing scope and obscures to what value an identifier actually refers. Compare the following snippets:
const a = 'no shadow';
function print() {
console.log(a);
}
print(); // logs 'no shadow'.
const a = 'no shadow';
function print() {
const a = 'shadow'; // TSLint will complain here.
console.log(a);
}
print(); // logs 'shadow'.
ESLint has an equivalent rule. For more background information, refer to this MDN closure doc.
Config
You can optionally pass an object to disable checking for certain kinds of declarations.
Possible keys are "class"
, "enum"
, "function"
, "import"
, "interface"
, "namespace"
, "typeAlias"
and "typeParameter"
. You can also pass "underscore
" to ignore variable names that begin with _
.
Just set the value to false
for the check you want to disable.
All checks default to true
, i.e. are enabled by default.
Note that you cannot disable variables and parameters.
The option "temporalDeadZone"
defaults to true
which shows errors when shadowing block scoped declarations in their
temporal dead zone. When set to false
parameters, classes, enums and variables declared
with let
or const
are not considered shadowed if the shadowing occurs within their
temporal dead zone.
The following example shows how the "temporalDeadZone"
option changes the linting result:
function fn(value) {
if (value) {
const tmp = value; // no error on this line if "temporalDeadZone" is false
return tmp;
}
let tmp = undefined;
if (!value) {
const tmp = value; // this line always contains an error
return tmp;
}
}
Examples
"no-shadowed-variable": true
"no-shadowed-variable": true,[object Object]
Schema
{
"type": "object",
"properties": {
"class": {
"type": "boolean"
},
"enum": {
"type": "boolean"
},
"function": {
"type": "boolean"
},
"import": {
"type": "boolean"
},
"interface": {
"type": "boolean"
},
"namespace": {
"type": "boolean"
},
"typeAlias": {
"type": "boolean"
},
"typeParameter": {
"type": "boolean"
},
"temporalDeadZone": {
"type": "boolean"
},
"underscore": {
"type": "boolean"
}
}
}
For more information see this page.
block is empty Open
} catch (err) {}
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- Exclude checks
Rule: no-empty
Disallows empty blocks.
Blocks with a comment inside are not considered empty.
Rationale
Empty blocks are often indicators of missing code.
Config
If allow-empty-catch
is specified, then catch blocks are allowed to be empty.
If allow-empty-functions
is specified, then function definitions are allowed to be empty.
Examples
"no-empty": true
"no-empty": true,allow-empty-catch
"no-empty": true,allow-empty-functions
"no-empty": true,allow-empty-catch,allow-empty-functions
Schema
{
"type": "array",
"items": {
"anyOf": [
{
"type": "string",
"enum": [
"allow-empty-catch"
]
},
{
"type": "string",
"enum": [
"allow-empty-functions"
]
}
]
}
}
For more information see this page.
block is empty Open
} catch (err) {}
- Read upRead up
- Exclude checks
Rule: no-empty
Disallows empty blocks.
Blocks with a comment inside are not considered empty.
Rationale
Empty blocks are often indicators of missing code.
Config
If allow-empty-catch
is specified, then catch blocks are allowed to be empty.
If allow-empty-functions
is specified, then function definitions are allowed to be empty.
Examples
"no-empty": true
"no-empty": true,allow-empty-catch
"no-empty": true,allow-empty-functions
"no-empty": true,allow-empty-catch,allow-empty-functions
Schema
{
"type": "array",
"items": {
"anyOf": [
{
"type": "string",
"enum": [
"allow-empty-catch"
]
},
{
"type": "string",
"enum": [
"allow-empty-functions"
]
}
]
}
}
For more information see this page.