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Assignment to property of function parameter 'memo'. Open
memo.years[year] = years[year].filter(i =>
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title: no-param-reassign ruletype: suggestion furtherreading:
- https://spin.atomicobject.com/2011/04/10/javascript-don-t-reassign-your-function-arguments/
Assignment to variables declared as function parameters can be misleading and lead to confusing behavior, as modifying function parameters will also mutate the arguments
object when not in strict mode (see When Not To Use It below). Often, assignment to function parameters is unintended and indicative of a mistake or programmer error.
This rule can be also configured to fail when function parameters are modified. Side effects on parameters can cause counter-intuitive execution flow and make errors difficult to track down.
Rule Details
This rule aims to prevent unintended behavior caused by modification or reassignment of function parameters.
Examples of incorrect code for this rule:
::: incorrect
/*eslint no-param-reassign: "error"*/
function foo(bar) {
bar = 13;
}
function foo(bar) {
bar++;
}
function foo(bar) {
for (bar in baz) {}
}
function foo(bar) {
for (bar of baz) {}
}
:::
Examples of correct code for this rule:
::: correct
/*eslint no-param-reassign: "error"*/
function foo(bar) {
var baz = bar;
}
:::
Options
This rule takes one option, an object, with a boolean property "props"
, and arrays "ignorePropertyModificationsFor"
and "ignorePropertyModificationsForRegex"
. "props"
is false
by default. If "props"
is set to true
, this rule warns against the modification of parameter properties unless they're included in "ignorePropertyModificationsFor"
or "ignorePropertyModificationsForRegex"
, which is an empty array by default.
props
Examples of correct code for the default { "props": false }
option:
::: correct
/*eslint no-param-reassign: ["error", { "props": false }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of incorrect code for the { "props": true }
option:
::: incorrect
/*eslint no-param-reassign: ["error", { "props": true }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsFor"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsFor": ["bar"] }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsForRegex"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsForRegex": ["^bar"] }]*/
function foo(barVar) {
barVar.prop = "value";
}
function foo(barrito) {
delete barrito.aaa;
}
function foo(bar_) {
bar_.aaa++;
}
function foo(barBaz) {
for (barBaz.aaa in baz) {}
}
function foo(barBaz) {
for (barBaz.aaa of baz) {}
}
:::
When Not To Use It
If you want to allow assignment to function parameters, then you can safely disable this rule.
Strict mode code doesn't sync indices of the arguments object with each parameter binding. Therefore, this rule is not necessary to protect against arguments object mutation in ESM modules or other strict mode functions. Source: http://eslint.org/docs/rules/
propType "thesauris" is not required, but has no corresponding defaultProps declaration. Open
thesauris: PropTypes.object,
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Prop spreading is forbidden Open
component = shallow(<Script {...props} />, { context }).dive();
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propType "saving" is not required, but has no corresponding defaultProps declaration. Open
saving: PropTypes.bool,
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propType "edit" is not required, but has no corresponding defaultProps declaration. Open
edit: PropTypes.func,
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Definition for rule 'node/no-restricted-import' was not found. Open
/* eslint-disable max-statements */
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Prefer named exports. Open
export default {
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Definition for rule 'node/no-restricted-import' was not found. Open
import { createSelector } from 'reselect';
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Do not use Array index in keys Open
<div key={i}>
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Prefer named exports. Open
export default Metadata;
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Prop type "object" is forbidden Open
data: PropTypes.object.isRequired,
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Definition for rule 'node/no-restricted-import' was not found. Open
import React from 'react';
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Prop spreading is forbidden Open
component = shallow(<MetadataFormButtons {...props} />, { context });
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Prop spreading is forbidden Open
component = shallow(<SelectMultiplePanel {...props} />);
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Prefer named exports. Open
export default connect(mapStateToProps, mapDispatchToProps)(withContext(EntityTypesList));
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Definition for rule 'node/no-restricted-import' was not found. Open
import React from 'react';
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Prop spreading is forbidden Open
component = shallow(<EntityTypesList {...props} />);
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Assignment to property of function parameter 'memo'. Open
memo.start = year;
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title: no-param-reassign ruletype: suggestion furtherreading:
- https://spin.atomicobject.com/2011/04/10/javascript-don-t-reassign-your-function-arguments/
Assignment to variables declared as function parameters can be misleading and lead to confusing behavior, as modifying function parameters will also mutate the arguments
object when not in strict mode (see When Not To Use It below). Often, assignment to function parameters is unintended and indicative of a mistake or programmer error.
This rule can be also configured to fail when function parameters are modified. Side effects on parameters can cause counter-intuitive execution flow and make errors difficult to track down.
Rule Details
This rule aims to prevent unintended behavior caused by modification or reassignment of function parameters.
Examples of incorrect code for this rule:
::: incorrect
/*eslint no-param-reassign: "error"*/
function foo(bar) {
bar = 13;
}
function foo(bar) {
bar++;
}
function foo(bar) {
for (bar in baz) {}
}
function foo(bar) {
for (bar of baz) {}
}
:::
Examples of correct code for this rule:
::: correct
/*eslint no-param-reassign: "error"*/
function foo(bar) {
var baz = bar;
}
:::
Options
This rule takes one option, an object, with a boolean property "props"
, and arrays "ignorePropertyModificationsFor"
and "ignorePropertyModificationsForRegex"
. "props"
is false
by default. If "props"
is set to true
, this rule warns against the modification of parameter properties unless they're included in "ignorePropertyModificationsFor"
or "ignorePropertyModificationsForRegex"
, which is an empty array by default.
props
Examples of correct code for the default { "props": false }
option:
::: correct
/*eslint no-param-reassign: ["error", { "props": false }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of incorrect code for the { "props": true }
option:
::: incorrect
/*eslint no-param-reassign: ["error", { "props": true }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsFor"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsFor": ["bar"] }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsForRegex"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsForRegex": ["^bar"] }]*/
function foo(barVar) {
barVar.prop = "value";
}
function foo(barrito) {
delete barrito.aaa;
}
function foo(bar_) {
bar_.aaa++;
}
function foo(barBaz) {
for (barBaz.aaa in baz) {}
}
function foo(barBaz) {
for (barBaz.aaa of baz) {}
}
:::
When Not To Use It
If you want to allow assignment to function parameters, then you can safely disable this rule.
Strict mode code doesn't sync indices of the arguments object with each parameter binding. Therefore, this rule is not necessary to protect against arguments object mutation in ESM modules or other strict mode functions. Source: http://eslint.org/docs/rules/
Assignment to property of function parameter 'connection'. Open
connection.language = getState().locale;
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title: no-param-reassign ruletype: suggestion furtherreading:
- https://spin.atomicobject.com/2011/04/10/javascript-don-t-reassign-your-function-arguments/
Assignment to variables declared as function parameters can be misleading and lead to confusing behavior, as modifying function parameters will also mutate the arguments
object when not in strict mode (see When Not To Use It below). Often, assignment to function parameters is unintended and indicative of a mistake or programmer error.
This rule can be also configured to fail when function parameters are modified. Side effects on parameters can cause counter-intuitive execution flow and make errors difficult to track down.
Rule Details
This rule aims to prevent unintended behavior caused by modification or reassignment of function parameters.
Examples of incorrect code for this rule:
::: incorrect
/*eslint no-param-reassign: "error"*/
function foo(bar) {
bar = 13;
}
function foo(bar) {
bar++;
}
function foo(bar) {
for (bar in baz) {}
}
function foo(bar) {
for (bar of baz) {}
}
:::
Examples of correct code for this rule:
::: correct
/*eslint no-param-reassign: "error"*/
function foo(bar) {
var baz = bar;
}
:::
Options
This rule takes one option, an object, with a boolean property "props"
, and arrays "ignorePropertyModificationsFor"
and "ignorePropertyModificationsForRegex"
. "props"
is false
by default. If "props"
is set to true
, this rule warns against the modification of parameter properties unless they're included in "ignorePropertyModificationsFor"
or "ignorePropertyModificationsForRegex"
, which is an empty array by default.
props
Examples of correct code for the default { "props": false }
option:
::: correct
/*eslint no-param-reassign: ["error", { "props": false }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of incorrect code for the { "props": true }
option:
::: incorrect
/*eslint no-param-reassign: ["error", { "props": true }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsFor"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsFor": ["bar"] }]*/
function foo(bar) {
bar.prop = "value";
}
function foo(bar) {
delete bar.aaa;
}
function foo(bar) {
bar.aaa++;
}
function foo(bar) {
for (bar.aaa in baz) {}
}
function foo(bar) {
for (bar.aaa of baz) {}
}
:::
Examples of correct code for the { "props": true }
option with "ignorePropertyModificationsForRegex"
set:
::: correct
/*eslint no-param-reassign: ["error", { "props": true, "ignorePropertyModificationsForRegex": ["^bar"] }]*/
function foo(barVar) {
barVar.prop = "value";
}
function foo(barrito) {
delete barrito.aaa;
}
function foo(bar_) {
bar_.aaa++;
}
function foo(barBaz) {
for (barBaz.aaa in baz) {}
}
function foo(barBaz) {
for (barBaz.aaa of baz) {}
}
:::
When Not To Use It
If you want to allow assignment to function parameters, then you can safely disable this rule.
Strict mode code doesn't sync indices of the arguments object with each parameter binding. Therefore, this rule is not necessary to protect against arguments object mutation in ESM modules or other strict mode functions. Source: http://eslint.org/docs/rules/
Prop type "object" is forbidden Open
searchResults: PropTypes.object,
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For more information visit Source: http://eslint.org/docs/rules/