List of pages that are needed

Following is a comprehensive list of pages for error messages that can be generated by JSLint and JSHint. The list is based on the strings found in the bundle object declared in jslint.js and by simply searching through the source of JSHint, since it doesn't centralise the possible strings like JSLint does.

Items that have been struck through have already been written about. Their articles can be found in the _posts directory. When writing a new article, please copy the file name from this list and save your article under that name.

If you discover a missing JSLint or JSHint message, please add it to the list. If you discover that a message is never actually generated by JSLint/JSHint, strike it through in the list and add a small note stating that, as far as you can tell, it is never used.

• 2001-01-01-a-cannot-be-named-b.html (JSHint 2.1.0+ only)
• 1980-01-01-a-is-already-defined.html
• 1980-02-01-a-is-only-available-in-javascript-1-7.html
• 1980-02-01-attempting-to-override-a-which-is-a-constant.html (JSHint only)
• 1980-03-01-avoid-eol-escaping.html (JSHint only, <1.0.0 was "escapement")
• 1979-01-01-the-and-subexpression-should-be-wrapped-in-parens.html
• 1978-01-01-do-not-assign-to-the-exception-parameter.html
• 1977-01-01-expected-an-assignment-or-function-call-and-saw-an-expression.html
• 1975-01-01-avoid-a.html
• 1974-01-01-bad-assignment.html
• 1972-01-01-bad-constructor.html
• 1971-02-01-bad-escapement-of-eol-use-option-multistr-if-needed.html (JSHint only)
• 1971-03-01-bad-escapement.html (JSHint only)
• 1968-01-01-bad-for-in-variable-a.html
• 1967-01-01-bad-invocation.html
• 1967-02-01-bad-line-breaking-before-a.html (JSHint only)
• 1965-01-01-do-not-use-new-for-side-effects.html
• 1964-01-01-bad-number-a.html (It appears that this cannot be generated by JSLint)
• 1963-01-01-bad-operand.html
• 1963-02-01-bad-option.html (JSHint only)
• 1963-03-02-bad-option-value.html (JSHint only, expands upon JSLint 'missing option value')
• 1961-02-01-blocks-are-nested-too-deeply.html (JSHint only)
• 1959-01-01-do-not-wrap-function-literals-in-parens-unless-they-are-immediately-invoked.html
• 1958-01-01-combine-this-with-the-previous-var-statement.html
• 1957-01-01-expected-a-conditional-expression-and-saw-an-assignment.html
• 1957-02-01-comma-warnings-can-be-turned-off-with-laxcomma.html (JSHint only)
• 1957-03-01-this-character-may-get-silently-deleted.html (JSHint only)
• 1956-01-01-confusing-use-of-a.html
• 1956-02-01-confusing-minusses.html (JSHint only)
• 1956-03-01-confusing-plusses.html (JSHint only)
• 1955-01-01-confusing-regular-expression.html
• 1954-01-01-a-constructor-name-a-should-start-with-an-uppercase-letter.html
• 1954-02-01-const-a-has-already-been-declared.html (JSHint only)
• 1954-03-01-const-a-is-initialized-to-undefined.html (JSHint only)
• 1954-04-01-constant-a-was-not-declared-correctly.html (JSHint only)
• 1954-04-02-creating-global-for-variable.html (JSHint only)
• 1954-05-01-cyclomatic-complexity-is-too-high-per-function.html (JSHint only)
• 1953-01-01-unexpected-control-character-a.html
• 1953-01-02-unexpected-control-character-in-string-a.html (JSHint only)
• 1951-01-01-unexpected-dangling-_-in-a.html
• 1950-01-01-dangerous-comment.html
• 1950-02-01-all-debugger-statements-should-be-removed.html (JSHint only)
• 1950-03-01-a-is-defined-but-never-used.html (JSHint only)
• 1949-01-01-only-properties-should-be-deleted.html
• 1948-01-01-duplicate-a.html
• 1948-02-01-duplicate-member-a.html (JSHint only)
• 1947-01-01-empty-block.html
• 1946-01-01-empty-case.html
• 1945-01-01-empty-class.html
• 1944-01-01-this-is-an-es5-feature.html
• 1944-01-02-es5-option-is-now-set-per-default.html (JSHint only)
• 1944-02-01-a-is-only-available-in-es6.html
• 1943-01-01-eval-is-evil.html
• 1942-01-01-expected-a.html
• 1941-01-01-expected-a-and-instead-saw-b.html
• 1940-01-01-expected-a-to-match-b-from-line-c-and-instead-saw-d.html
• 1939-01-01-expected-an-at-rule-and-instead-saw-a.html
• 1938-01-01-expected-a-at-column-b-not-column-c.html
• 1934-01-01-expected-a-number-between-0-and-1-and-instead-saw-a.html
• 1933-01-01-expected-an-id-and-instead-saw-a.html
• 1932-01-01-expected-an-identifier-and-instead-saw-a.html
• 1931-01-01-expected-an-identifier-and-instead-saw-a-a-reserved-word.html
• 1931-02-01-expected-a-json-value.html (JSHint JSON mode only)
• 1925-01-01-expected-a-number-and-instead-saw-a.html
• 1924-01-01-expected-an-operator-and-instead-saw-a.html
• 1923-01-01-expected-a-percentage-and-instead-saw-a.html
• 1922-01-01-expected-a-positive-number-and-instead-saw-a.html
• 1919-01-01-expected-a-small-positive-integer-and-instead-saw-a.html
• 1918-01-01-expected-exactly-one-space-between-a-and-b.html
• 1917-01-01-expected-a-string-and-instead-saw-a.html
• 1913-02-01-extra-comma.html (JSHint only)
• 1912-01-01-the-body-of-a-for-in-should-be-wrapped-in-an-if-statement.html
• 1911-01-01-function-statements-should-not-be-placed-in-blocks.html
• 1910-01-01-the-function-constructor-is-eval.html
• 1909-01-01-dont-make-functions-within-a-loop.html
• 1908-01-01-function-statements-are-not-invocable.html
• 1907-01-01-use-the-function-form-of-use-strict.html
• 1907-02-01-a-generator-function-shall-contain-a-yield-statement.html (JSHint only)
• 1906-02-01-hasownproperty-is-a-really-bad-name.html (JSHint only)
• 1905-01-01-avoid-html-event-handlers.html
• 1904-01-01-expected-an-identifier-in-an-assignment-and-instead-saw-a-function-invocation.html
• 1904-02-01-identifier-a-is-not-in-camel-case.html (JSHint only)
• 1903-01-01-implied-eval-is-evil-pass-a-function-instead-of-a-string.html
• 1903-02-01-illegal-comma.html (JSHint only)
• 1902-01-01-unexpected-in-compare-with-undefined-or-use-the-hasownproperty-method-instead.html
• 1901-01-01-insecure-a.html
• 1901-02-01-inner-functions-should-be-listed-at-the-top-of-the-outer-function.html (JSHint only)
• 1901-03-01-input-is-neither-a-string-nor-an-array-of-strings (JSHint call via JS only)
• 1901-04-01-input-is-empty.html (JSHint only)
• 1901-05-01-invalid-regular-expression.html (JSHint only)
• 1900-01-01-use-the-isnan-function-to-compare-with-nan.html
• 1898-01-01-a-leading-decimal-point-can-be-confused-with-a-dot-a.html
• 1898-02-01-line-breaking-error-a.html (JSHint only)
• 1898-03-01-let-declaration-not-directly-within-a-block.html (JSHint only)
• 1897-01-01-missing-a.html
• 1897-02-01-missing-semicolon.html (JSHint only)
• 1896-01-01-missing-a-after-b.html
• 1894-01-01-missing-property-name.html
• 1893-01-01-missing-space-between-a-and-b.html
• 1891-01-01-missing-use-strict-statement.html
• 1891-02-01-missing-invoking-a-constructor.html (JSHint only)
• 1890-01-01-mixed-spaces-and-tabs.html
• 1890-02-01-mixed-double-and-single-quotes.html (JSHint only)
• 1889-01-01-move-the-invocation-into-the-parens-that-contain-the-function.html
• 1888-01-01-move-var-declarations-to-the-top-of-the-function.html
• 1888-02-01-a-is-only-available-in-mozilla-javascript-extensions.html
• 1887-01-01-missing-name-in-function-statement.html
• 1887-02-01-missing-on-a-case-clause.html (JSHint only)
• 1887-03-01-missing-to-match-from-line-a.html (JSHint only)
• 1986-01-01-nested-comment.html
• 1885-01-01-nested-not.html
• 1884-01-01-do-not-use-a-as-a-constructor.html
• 1883-01-01-a-has-not-been-fully-defined-yet.html
• 1882-01-01-a-is-not-a-function.html
• 1881-01-01-a-is-not-a-label.html
• 1880-01-01-a-is-out-of-scope.html
• 1879-01-01-a-should-not-be-greater-than-b.html
• 1878-01-01-dont-use-octal-a-use-instead.html
• 1878-02-01-octal-literals-are-not-allowed-in-strict-mode.html (JSHint only)
• 1978-03-01-option-validthis-cant-be-used-in-a-global-scope.html (JSHint only)
• 1877-01-01-do-not-mutate-parameter-a-when-using-arguments.html
• 1876-01-01-unexpected-parameter-a-in-get-b-function.html
• 1875-01-01-expected-parameter-value-in-set-a-function.html
• 1875-02-01-the-a-property-is-deprecated.html (JSHint only)
• 1874-01-01-missing-radix-parameter.html
• 1873-01-01-read-only.html
• 1872-01-01-redefinition-of-a.html
• 1871-01-01-reserved-name-a.html
• 1871-02-01-did-you-mean-to-return-a-conditional.html (JSHint only)
• 1870-01-01-a-b-scanned.html
• 1869-01-01-a-regular-expression-literal-can-be-confused-with.html TODO: Update JSHint details... behaviour of this warning is confusing as of 1.0.0
• 1868-01-01-expected-to-see-a-statement-and-instead-saw-a-block.html
• 1868-02-01-setter-is-defined-without-getter.html (JSHint only)
• 1867-01-01-stopping.html
• 1866-01-01-strange-loop.html
• 1865-01-01-strict-violation.html
• 1865-02-01-strings-must-use-singlequote.html (JSHint only)
• 1865-03-01-strings-must-use-doublequote.html (JSHint only)
• 1864-01-01-a-is-better-written-in-dot-notation.html
• 1863-01-01-unexpected-sync-method-a.html
• 1862-01-01-a-a-must-be-within-b.html
• 1861-01-01-unexpected-todo-comment.html
• 1860-01-01-line-too-long.html
• 1859-01-01-too-many-errors.html
• 1859-02-01-too-many-parameters-per-function.html (JSHint only)
• 1859-03-01-too-many-statements-per-function.html (JSHint only)
• 1859-04-01-too-many-var-statements.html (JSHint only)
• 1858-01-01-a-trailing-decimal-point-can-be-confused-with-a-dot.html
• 1856-01-01-unclosed-string.html
• 1855-01-01-unclosed-comment.html
• 1854-01-01-unclosed-regular-expression.html
• 1854-02-01-unbegun-comment.html (JSHint only)
• 1853-01-01-unescaped-a.html
• 1852-01-01-unexpected-a.html (IN PROGRESS, GENERAL PAGE TO HOLD LINKS TO SPECIFIC MESSAGES)
• 1852-02-01-unexpected-plus-plus.html (More detail on a specific 1852-01-1 message)
• 1852-03-01-unexpected-nan.html (More detail on a specific 1852-01-1 message)
• 1851-01-01-unexpected-character-a-in-b.html
• 1850-01-01-unexpected-comment.html
• 1849-01-01-unexpected-else-after-return.html
• 1849-02-01-unexpected-early-end-of-program.html (JSHint only)
• 1848-01-01-unexpected-label-a.html
• 1847-01-01-unexpected-property-a.html
• 1846-01-01-unexpected-space-between-a-and-b.html
• 1845-01-01-unexpected-typeof-compare-directly-with-a.html
• 1844-01-01-it-is-not-necessary-to-initialize-a-to-undefined.html
• 1844-02-01-unnecessary-semicolon.html (JSHint only)
• 1844-03-01-unnecessary-directive-a.html (JSHint only, generic version of JSLint 1843-01-01)
• 1843-01-01-unnecessary-use-strict.html
• 1842-01-01-unreachable-a-after-b.html
• 1839-01-01-unsafe-character.html
• 1838-01-01-javascript-url.html
• 1838-01-02-script-url.html (JSHint only, presumably equivalent of above)
• 1838-01-03-label-a-looks-like-a-javascript-url.html (JSHint only)
• 1838-02-01-unmatched-a.html (JSHint only)
• 1837-01-01-use-the-array-literal-notation.html
• 1836-01-01-spaces-are-hard-to-count-use-a.html
• 1835-01-01-use-the-charat-method.html (seems to be unused)
• 1834-01-01-use-the-object-literal-notation.html
• 1833-01-01-use-the-or-operator.html
• 1832-01-01-use-a-named-parameter.html
• 1831-01-01-a-was-used-before-it-was-defined.html
• 1830-01-01-variable-a-was-not-declared-correctly.html
• 1830-02-01-value-of-a-may-be-overwritten-in-ie.html (JSHint only)
• 1829-01-01-weird-assignment.html
• 1828-01-01-weird-condition.html
• 1827-01-01-weird-construction-delete-new.html
• 1826-01-01-weird-program.html
• 1825-01-01-weird-relation.html
• 1824-01-01-weird-ternary.html
• 1824-02-01-with-is-not-allowed-in-strict-mode.html (JSHint only)
• 1823-01-01-wrap-an-immediate-function-invocation-in-parentheses.html
• 1822-01-01-wrap-the-regexp-literal-in-parens.html
• 1821-01-01-document-write-can-be-a-form-of-eval.html
• 1820-01-01-a-yield-statement-shall-be-within-a-generator-function.html (JSHint only)

JSLint removed HTML, CSS and ADsafe parsing in a recent commit so any messages relating to those that are not yet documented are now low priority:

• 1820-01-01-adsafe-violation-id-does-not-match.html
• 1819-01-01-adsafe-violation-missing-adsafe-id-or-adsafe-go.html
• 1818-01-01-adsafe-lib-violation.html
• 1817-01-01-adsafe-the-second-argument-to-lib-must-be-a-function.html
• 1816-01-01-adsafe-violation-missing-id_.html
• 1815-01-01-adsafe-name-violation-a.html
• 1814-01-01-adsafe-script-placement-violation.html
• 1813-01-01-adsafe-violation-an-id-must-have-a-a-prefix.html
• 1812-01-01-adsafe-script-violation.html
• 1811-01-01-adsafe-unapproved-script-source.html
• 1810-01-01-adsafe-subscript-a.html
• 1809-01-01-adsafe-violation-disallowed-tag-a.html
• 1841-01-01-unrecognized-style-attribute-a.html
• 1840-01-01-unrecognized-tag.html
• 1857-01-01-type-is-unnecessary.html
• 1892-01-01-missing-url.html
• 1895-01-01-missing-option-value.html
• 1899-01-01-lang-is-deprecated.html
• 1906-01-01-html-confusion-in-regular-expression-a.html
• 1976-01-01-attribute-a-not-all-lower-case.html
• 1973-01-01-bad-hex-color-a.html
• 1970-01-01-bad-html-string.html
• 1969-01-01-bad-id-a.html
• 1971-01-01-bad-entity.html
• 1966-01-01-bad-name-a.html
• 1962-01-01-bad-style.html
• 1961-01-01-bad-type.html
• 1960-01-01-bad-url-a.html
• 1937-01-01-expected-an-attribute-and-instead-saw-a.html
• 1936-01-01-expected-an-attribute-value-and-instead-saw-a.html
• 1935-01-01-expected-a-class-and-instead-saw-a.html
• 1930-01-01-expected-a-linear-unit-and-instead-saw-a.html
• 1929-01-01-expected-a-lang-code-and-instead-saw-a.html
• 1928-01-01-expected-a-css-media-type-and-instead-saw-a.html
• 1927-01-01-expected-a-name-and-instead-saw-a.html
• 1926-01-01-expected-a-non-standard-style-attribute-and-instead-saw-a.html
• 1921-01-01-expected-a-pseudo-and-instead-saw-a.html
• 1920-01-01-expected-a-css-selector-and-instead-saw-a.html
• 1916-01-01-expected-a-style-attribute-and-instead-saw-a.html
• 1915-01-01-expected-a-style-pattern-and-instead-saw-a.html
• 1914-01-01-expected-a-tagname-and-instead-saw-a.html
• 1913-01-01-expected-a-type-and-instead-saw-a.html
• 1952-01-01-a-css-file-should-begin-with-charset-utf-8.html