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node_modules/stylelint/lib/rules/selector-attribute-brackets-space-inside/README.md

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+# selector-attribute-brackets-space-inside
+
+Require a single space or disallow whitespace on the inside of the brackets within attribute selectors.
+
+```css
+    [ target=_blank ]
+/** ↑               ↑
+ * The space inside these two brackets */
+```
+
+## Options
+
+`string`: `"always"|"never"`
+
+### `"always"`
+
+There *must always* be a single space inside the brackets.
+
+The following patterns are considered warnings:
+
+```css
+[target] {}
+```
+
+```css
+[ target] {}
+```
+
+```css
+[target ] {}
+```
+
+```css
+[target=_blank] {}
+```
+
+```css
+[ target=_blank] {}
+```
+
+```css
+[target=_blank ] {}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+[ target ] {}
+```
+
+```css
+[ target=_blank ] {}
+```
+
+### `"never"`
+
+There *must never* be whitespace on the inside the brackets.
+
+The following patterns are considered warnings:
+
+```css
+[ target] {}
+```
+
+```css
+[target ] {}
+```
+
+```css
+[ target ] {}
+```
+
+```css
+[ target=_blank] {}
+```
+
+```css
+[target=_blank ] {}
+```
+
+```css
+[ target=_blank ] {}
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+[target] {}
+```
+
+```css
+[target=_blank] {}
+```

node_modules/stylelint/lib/rules/selector-attribute-brackets-space-inside/index.js

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+"use strict"
+
+const isStandardSyntaxRule = require("../../utils/isStandardSyntaxRule")
+const parseSelector = require("../../utils/parseSelector")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const styleSearch = require("style-search")
+
+const ruleName = "selector-attribute-brackets-space-inside"
+
+const messages = ruleMessages(ruleName, {
+  expectedOpening: "Expected single space after \"[\"",
+  rejectedOpening: "Unexpected whitespace after \"[\"",
+  expectedClosing: "Expected single space before \"]\"",
+  rejectedClosing: "Unexpected whitespace before \"]\"",
+})
+
+const rule = function (expectation) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, {
+      actual: expectation,
+      possible: [
+        "always",
+        "never",
+      ],
+    })
+    if (!validOptions) {
+      return
+    }
+
+    root.walkRules(rule => {
+      if (!isStandardSyntaxRule(rule)) {
+        return
+      }
+      if (rule.selector.indexOf("[") === -1) {
+        return
+      }
+
+      parseSelector(rule.selector, result, rule, selectorTree => {
+        selectorTree.walkAttributes(attributeNode => {
+          const attributeSelectorString = attributeNode.toString()
+
+          styleSearch({ source: attributeSelectorString, target: "[" }, match => {
+            const nextCharIsSpace = attributeSelectorString[match.startIndex + 1] === " "
+            const index = attributeNode.sourceIndex + match.startIndex + 1
+            if (nextCharIsSpace && expectation === "never") {
+              complain(messages.rejectedOpening, index)
+            }
+            if (!nextCharIsSpace && expectation === "always") {
+              complain(messages.expectedOpening, index)
+            }
+          })
+
+          styleSearch({ source: attributeSelectorString, target: "]" }, match => {
+            const prevCharIsSpace = attributeSelectorString[match.startIndex - 1] === " "
+            const index = attributeNode.sourceIndex + match.startIndex - 1
+            if (prevCharIsSpace && expectation === "never") {
+              complain(messages.rejectedClosing, index)
+            }
+            if (!prevCharIsSpace && expectation === "always") {
+              complain(messages.expectedClosing, index)
+            }
+          })
+        })
+      })
+
+      function complain(message, index) {
+        report({
+          message,
+          index,
+          result,
+          ruleName,
+          node: rule,
+        })
+      }
+    })
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule