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node_modules/stylelint/lib/rules/time-no-imperceptible/README.md

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+# time-no-imperceptible
+
+***Deprecated: Instead use the [`time-min-milliseconds`](../time-min-milliseconds/README.md) rule with `100` as its primary option.***
+
+Disallow `animation` and `transition` less than or equal to 100ms.
+
+```css
+a { animation: slip-n-slide 150ms linear; }
+/**                         ↑
+ *                  This time */
+```
+
+This rule checks `transition-duration`, `transition-delay`, `animation-duration`, `animation-delay`, and those times as they manifest in the `transition` and `animation` shorthands.
+
+## Options
+
+### `true`
+
+The following patterns are considered warnings:
+
+```css
+a { animation: 80ms; }
+```
+
+```css
+a { transition-duration: 0.08s; }
+```
+
+```css
+a { transition: background-color 6ms linear; }
+```
+
+```css
+a { animation: horse-dance 1s linear 0.01s; }
+```
+
+The following patterns are *not* considered warnings:
+
+```css
+a { animation: 8s; }
+```
+
+```css
+a { transition-duration: 0.8s; }
+```
+
+```css
+a { transition: background-color 600ms linear; }
+```
+
+```css
+a { animation: horse-dance 1s linear 1.3s; }
+```

node_modules/stylelint/lib/rules/time-no-imperceptible/index.js

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+"use strict"
+
+const declarationValueIndex = require("../../utils/declarationValueIndex")
+const report = require("../../utils/report")
+const ruleMessages = require("../../utils/ruleMessages")
+const validateOptions = require("../../utils/validateOptions")
+const keywordSets = require("../../reference/keywordSets")
+const postcss = require("postcss")
+const valueParser = require("postcss-value-parser")
+
+const ruleName = "time-no-imperceptible"
+
+const messages = ruleMessages(ruleName, {
+  rejected: time => `Unexpected time value "${time}" less than or equal to 100ms`,
+})
+
+const MINIMUM_MILLISECONDS = 100
+
+const rule = function (actual) {
+  return (root, result) => {
+    const validOptions = validateOptions(result, ruleName, { actual })
+    if (!validOptions) {
+      return
+    }
+
+    result.warn((
+      `'${ruleName}' has been deprecated and in 8.0 will be removed. Instead use 'time-min-milliseconds' with '100' as its primary option.`
+    ), {
+      stylelintType: "deprecation",
+      stylelintReference: `https://stylelint.io/user-guide/rules/${ruleName}/`,
+    })
+
+    root.walkDecls(decl => {
+      if (keywordSets.longhandTimeProperties.has(postcss.vendor.unprefixed(decl.prop.toLowerCase()))) {
+        if (isImperceptibleTime(decl.value)) {
+          complain(messages.rejected(decl.value), decl)
+        }
+      }
+
+      if (keywordSets.shorthandTimeProperties.has(postcss.vendor.unprefixed(decl.prop.toLowerCase()))) {
+        const valueList = postcss.list.space(decl.value)
+        for (const value of valueList) {
+          if (isImperceptibleTime(value)) {
+            complain(messages.rejected(value), decl, decl.value.indexOf(value))
+          }
+        }
+      }
+    })
+
+    function isImperceptibleTime(time) {
+      const parsedTime = valueParser.unit(time)
+      if (!parsedTime) return false
+      const absoluteTime = Math.abs(parsedTime.number)
+      if (parsedTime.unit.toLowerCase() === "ms" && absoluteTime <= MINIMUM_MILLISECONDS) {
+        return true
+      }
+      if (parsedTime.unit.toLowerCase() === "s" && absoluteTime * 1000 <= MINIMUM_MILLISECONDS) {
+        return true
+      }
+      return false
+    }
+
+    function complain(message, decl) {
+      const offset = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0
+
+      report({
+        result,
+        ruleName,
+        message,
+        index: declarationValueIndex(decl) + offset,
+        node: decl,
+      })
+    }
+  }
+}
+
+rule.ruleName = ruleName
+rule.messages = messages
+module.exports = rule