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Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/is.only-tabbable.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/is.shadowed.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected mix of '&&' and '||'.
Open

        var _redirectTargetLabel = _redirectTarget && _redirectTarget.getAttribute('data-label') || null;
Severity: Minor
Found in test/unit/core.browser-compatibility.test.js by eslint

Disallow mixes of different operators (no-mixed-operators)

Enclosing complex expressions by parentheses clarifies the developer's intention, which makes the code more readable. This rule warns when different operators are used consecutively without parentheses in an expression.

var foo = a && b || c || d;    /*BAD: Unexpected mix of '&&' and '||'.*/
var foo = (a && b) || c || d;  /*GOOD*/
var foo = a && (b || c || d);  /*GOOD*/

Rule Details

This rule checks BinaryExpression and LogicalExpression.

This rule may conflict with [no-extra-parens](no-extra-parens.md) rule. If you use both this and [no-extra-parens](no-extra-parens.md) rule together, you need to use the nestedBinaryExpressions option of [no-extra-parens](no-extra-parens.md) rule.

Examples of incorrect code for this rule:

/*eslint no-mixed-operators: "error"*/

var foo = a && b < 0 || c > 0 || d + 1 === 0;
var foo = a + b * c;

Examples of correct code for this rule:

/*eslint no-mixed-operators: "error"*/

var foo = a || b || c;
var foo = a && b && c;
var foo = (a && b < 0) || c > 0 || d + 1 === 0;
var foo = a && (b < 0 || c > 0 || d + 1 === 0);
var foo = a + (b * c);
var foo = (a + b) * c;

Options

{
    "no-mixed-operators": [
        "error",
        {
            "groups": [
                ["+", "-", "*", "/", "%", "**"],
                ["&", "|", "^", "~", "<<", ">>", ">>>"],
                ["==", "!=", "===", "!==", ">", ">=", "<", "<="],
                ["&&", "||"],
                ["in", "instanceof"]
            ],
            "allowSamePrecedence": true
        }
    ]
}

This rule has 2 options.

  • groups (string[][]) - specifies groups to compare operators. When this rule compares two operators, if both operators are included in a same group, this rule checks it. Otherwise, this rule ignores it. This value is a list of groups. The group is a list of binary operators. Default is the groups for each kind of operators.
  • allowSamePrecedence (boolean) - specifies to allow mix of 2 operators if those have the same precedence. Default is true.

groups

The following operators can be used in groups option:

  • Arithmetic Operators: "+", "-", "*", "/", "%", "**"
  • Bitwise Operators: "&", "|", "^", "~", "<<", ">>", ">>>"
  • Comparison Operators: "==", "!=", "===", "!==", ">", ">=", "<", "<="
  • Logical Operators: "&&", "||"
  • Relational Operators: "in", "instanceof"

Now, considers about {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} configure. This configure has 2 groups: bitwise operators and logical operators. This rule checks only if both operators are included in a same group. So, in this case, this rule comes to check between bitwise operators and between logical operators. This rule ignores other operators.

Examples of incorrect code for this rule with {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} option:

/*eslint no-mixed-operators: ["error", {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]}]*/

var foo = a && b < 0 || c > 0 || d + 1 === 0;
var foo = a & b | c;

Examples of correct code for this rule with {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} option:

/*eslint no-mixed-operators: ["error", {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]}]*/

var foo = a || b > 0 || c + 1 === 0;
var foo = a && b > 0 && c + 1 === 0;
var foo = (a && b < 0) || c > 0 || d + 1 === 0;
var foo = a && (b < 0 ||  c > 0 || d + 1 === 0);
var foo = (a & b) | c;
var foo = a & (b | c);
var foo = a + b * c;
var foo = a + (b * c);
var foo = (a + b) * c;

allowSamePrecedence

Examples of correct code for this rule with {"allowSamePrecedence": true} option:

/*eslint no-mixed-operators: ["error", {"allowSamePrecedence": true}]*/

// + and - have the same precedence.
var foo = a + b - c;

Examples of incorrect code for this rule with {"allowSamePrecedence": false} option:

/*eslint no-mixed-operators: ["error", {"allowSamePrecedence": false}]*/

// + and - have the same precedence.
var foo = a + b - c;

When Not To Use It

If you don't want to be notified about mixed operators, then it's safe to disable this rule.

Related Rules

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/is.valid-tabindex.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/query.focusable.all.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/get.active-element.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/util.visible-area.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected mix of '&&' and '||'.
Open

        expect(isFocusable(element)).to.equal(supports.focusingSvgElements && supports.focusSvg || supports.focusSvgTabindexAttribute);
Severity: Minor
Found in test/unit/is.focusable.test.js by eslint

Disallow mixes of different operators (no-mixed-operators)

Enclosing complex expressions by parentheses clarifies the developer's intention, which makes the code more readable. This rule warns when different operators are used consecutively without parentheses in an expression.

var foo = a && b || c || d;    /*BAD: Unexpected mix of '&&' and '||'.*/
var foo = (a && b) || c || d;  /*GOOD*/
var foo = a && (b || c || d);  /*GOOD*/

Rule Details

This rule checks BinaryExpression and LogicalExpression.

This rule may conflict with [no-extra-parens](no-extra-parens.md) rule. If you use both this and [no-extra-parens](no-extra-parens.md) rule together, you need to use the nestedBinaryExpressions option of [no-extra-parens](no-extra-parens.md) rule.

Examples of incorrect code for this rule:

/*eslint no-mixed-operators: "error"*/

var foo = a && b < 0 || c > 0 || d + 1 === 0;
var foo = a + b * c;

Examples of correct code for this rule:

/*eslint no-mixed-operators: "error"*/

var foo = a || b || c;
var foo = a && b && c;
var foo = (a && b < 0) || c > 0 || d + 1 === 0;
var foo = a && (b < 0 || c > 0 || d + 1 === 0);
var foo = a + (b * c);
var foo = (a + b) * c;

Options

{
    "no-mixed-operators": [
        "error",
        {
            "groups": [
                ["+", "-", "*", "/", "%", "**"],
                ["&", "|", "^", "~", "<<", ">>", ">>>"],
                ["==", "!=", "===", "!==", ">", ">=", "<", "<="],
                ["&&", "||"],
                ["in", "instanceof"]
            ],
            "allowSamePrecedence": true
        }
    ]
}

This rule has 2 options.

  • groups (string[][]) - specifies groups to compare operators. When this rule compares two operators, if both operators are included in a same group, this rule checks it. Otherwise, this rule ignores it. This value is a list of groups. The group is a list of binary operators. Default is the groups for each kind of operators.
  • allowSamePrecedence (boolean) - specifies to allow mix of 2 operators if those have the same precedence. Default is true.

groups

The following operators can be used in groups option:

  • Arithmetic Operators: "+", "-", "*", "/", "%", "**"
  • Bitwise Operators: "&", "|", "^", "~", "<<", ">>", ">>>"
  • Comparison Operators: "==", "!=", "===", "!==", ">", ">=", "<", "<="
  • Logical Operators: "&&", "||"
  • Relational Operators: "in", "instanceof"

Now, considers about {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} configure. This configure has 2 groups: bitwise operators and logical operators. This rule checks only if both operators are included in a same group. So, in this case, this rule comes to check between bitwise operators and between logical operators. This rule ignores other operators.

Examples of incorrect code for this rule with {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} option:

/*eslint no-mixed-operators: ["error", {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]}]*/

var foo = a && b < 0 || c > 0 || d + 1 === 0;
var foo = a & b | c;

Examples of correct code for this rule with {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]} option:

/*eslint no-mixed-operators: ["error", {"groups": [["&", "|", "^", "~", "<<", ">>", ">>>"], ["&&", "||"]]}]*/

var foo = a || b > 0 || c + 1 === 0;
var foo = a && b > 0 && c + 1 === 0;
var foo = (a && b < 0) || c > 0 || d + 1 === 0;
var foo = a && (b < 0 ||  c > 0 || d + 1 === 0);
var foo = (a & b) | c;
var foo = a & (b | c);
var foo = a + b * c;
var foo = a + (b * c);
var foo = (a + b) * c;

allowSamePrecedence

Examples of correct code for this rule with {"allowSamePrecedence": true} option:

/*eslint no-mixed-operators: ["error", {"allowSamePrecedence": true}]*/

// + and - have the same precedence.
var foo = a + b - c;

Examples of incorrect code for this rule with {"allowSamePrecedence": false} option:

/*eslint no-mixed-operators: ["error", {"allowSamePrecedence": false}]*/

// + and - have the same precedence.
var foo = a + b - c;

When Not To Use It

If you don't want to be notified about mixed operators, then it's safe to disable this rule.

Related Rules

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/is.native-disabled-supported.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/when.visible-area.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/is.tabbable.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/is.valid-area.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/observe.shadow-mutations.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/query.tabbable.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/query.tabbable.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/util.compare-position.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/util.decorate-context.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/util.merge-dom-order.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern/chai!expect'. Do not use import syntax to configure webpack loaders.
Open

  var expect = require('intern/chai!expect');
Severity: Minor
Found in test/unit/util.merge-dom-order.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

Unexpected '!' in 'intern!bdd'. Do not use import syntax to configure webpack loaders.
Open

  var bdd = require('intern!bdd');
Severity: Minor
Found in test/unit/util.toggle-class.test.js by eslint

For more information visit Source: http://eslint.org/docs/rules/

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