1 files changed, 0 insertions, 231 deletions
diff --git a/node_modules/postcss-merge-rules/src/lib/ensureCompatibility.js b/node_modules/postcss-merge-rules/src/lib/ensureCompatibility.js
deleted file mode 100644
index e8f60f09..00000000
--- a/node_modules/postcss-merge-rules/src/lib/ensureCompatibility.js
+++ /dev/null
@@ -1,231 +0,0 @@
-'use strict';
-const { isSupported } = require('caniuse-api');
-const selectorParser = require('postcss-selector-parser');
-
-const simpleSelectorRe = /^#?[-._a-z0-9 ]+$/i;
-
-const cssSel2 = 'css-sel2';
-const cssSel3 = 'css-sel3';
-const cssGencontent = 'css-gencontent';
-const cssFirstLetter = 'css-first-letter';
-const cssFirstLine = 'css-first-line';
-const cssInOutOfRange = 'css-in-out-of-range';
-const formValidation = 'form-validation';
-
-const vendorPrefix =
-  /-(ah|apple|atsc|epub|hp|khtml|moz|ms|o|rim|ro|tc|wap|webkit|xv)-/;
-
-const level2Sel = new Set(['=', '~=', '|=']);
-const level3Sel = new Set(['^=', '$=', '*=']);
-
-/**
- * @param {string} selector
- * @return {RegExpMatchArray | null}
- */
-function filterPrefixes(selector) {
-  return selector.match(vendorPrefix);
-}
-
-/**
- * Internet Explorer use :-ms-input-placeholder.
- * Microsoft Edge use ::-ms-input-placeholder.
- *
- * @type {(selector: string) => number}
- */
-const findMsInputPlaceholder = (selector) =>
-  ~selector.search(/-ms-input-placeholder/i);
-
-/**
- * @param {string[]} selectorsA
- * @param {string[]} selectorsB
- * @return {boolean}
- */
-function sameVendor(selectorsA, selectorsB) {
-  /** @type {(selectors: string[]) => string} */
-  let same = (selectors) => selectors.map(filterPrefixes).join();
-  /** @type {(selectors: string[]) => string | undefined} */
-  let findMsVendor = (selectors) => selectors.find(findMsInputPlaceholder);
-  return (
-    same(selectorsA) === same(selectorsB) &&
-    !(findMsVendor(selectorsA) && findMsVendor(selectorsB))
-  );
-}
-
-/**
- * @param {string} selector
- * @return {boolean}
- */
-function noVendor(selector) {
-  return !vendorPrefix.test(selector);
-}
-
-const pseudoElements = {
-  ':active': cssSel2,
-  ':after': cssGencontent,
-  ':any-link': 'css-any-link',
-  ':before': cssGencontent,
-  ':checked': cssSel3,
-  ':default': 'css-default-pseudo',
-  ':dir': 'css-dir-pseudo',
-  ':disabled': cssSel3,
-  ':empty': cssSel3,
-  ':enabled': cssSel3,
-  ':first-child': cssSel2,
-  ':first-letter': cssFirstLetter,
-  ':first-line': cssFirstLine,
-  ':first-of-type': cssSel3,
-  ':focus': cssSel2,
-  ':focus-within': 'css-focus-within',
-  ':focus-visible': 'css-focus-visible',
-  ':has': 'css-has',
-  ':hover': cssSel2,
-  ':in-range': cssInOutOfRange,
-  ':indeterminate': 'css-indeterminate-pseudo',
-  ':invalid': formValidation,
-  ':is': 'css-matches-pseudo',
-  ':lang': cssSel2,
-  ':last-child': cssSel3,
-  ':last-of-type': cssSel3,
-  ':link': cssSel2,
-  ':matches': 'css-matches-pseudo',
-  ':not': cssSel3,
-  ':nth-child': cssSel3,
-  ':nth-last-child': cssSel3,
-  ':nth-last-of-type': cssSel3,
-  ':nth-of-type': cssSel3,
-  ':only-child': cssSel3,
-  ':only-of-type': cssSel3,
-  ':optional': 'css-optional-pseudo',
-  ':out-of-range': cssInOutOfRange,
-  ':placeholder-shown': 'css-placeholder-shown',
-  ':required': formValidation,
-  ':root': cssSel3,
-  ':target': cssSel3,
-  '::after': cssGencontent,
-  '::backdrop': 'dialog',
-  '::before': cssGencontent,
-  '::first-letter': cssFirstLetter,
-  '::first-line': cssFirstLine,
-  '::marker': 'css-marker-pseudo',
-  '::placeholder': 'css-placeholder',
-  '::selection': 'css-selection',
-  ':valid': formValidation,
-  ':visited': cssSel2,
-};
-
-/**
- * @param {string} selector
- * @return {boolean}
- */
-function isCssMixin(selector) {
-  return selector[selector.length - 1] === ':';
-}
-
-/**
- * @param {string} selector
- * @return {boolean}
- */
-function isHostPseudoClass(selector) {
-  return selector.includes(':host');
-}
-
-const isSupportedCache = new Map();
-
-// Move to util in future
-/**
- * @param {string} feature
- * @param {string[] | undefined} browsers
- */
-function isSupportedCached(feature, browsers) {
-  const key = JSON.stringify({ feature, browsers });
-  let result = isSupportedCache.get(key);
-
-  if (!result) {
-    result = isSupported(feature, /** @type {string[]} */ (browsers));
-    isSupportedCache.set(key, result);
-  }
-
-  return result;
-}
-
-/**
- * @param {string[]} selectors
- * @param{string[]=} browsers
- * @param{Map<string,boolean>=} compatibilityCache
- * @return {boolean}
- */
-function ensureCompatibility(selectors, browsers, compatibilityCache) {
-  // Should not merge mixins
-  if (selectors.some(isCssMixin)) {
-    return false;
-  }
-
-  // Should not merge :host selector https://github.com/angular/angular-cli/issues/18672
-  if (selectors.some(isHostPseudoClass)) {
-    return false;
-  }
-  return selectors.every((selector) => {
-    if (simpleSelectorRe.test(selector)) {
-      return true;
-    }
-    if (compatibilityCache && compatibilityCache.has(selector)) {
-      return compatibilityCache.get(selector);
-    }
-    let compatible = true;
-    selectorParser((ast) => {
-      ast.walk((node) => {
-        const { type, value } = node;
-        if (type === 'pseudo') {
-          const entry =
-            pseudoElements[/** @type {keyof pseudoElements} */ (value)];
-          if (!entry && noVendor(value)) {
-            compatible = false;
-          }
-          if (entry && compatible) {
-            compatible = isSupportedCached(entry, browsers);
-          }
-        }
-        if (type === 'combinator') {
-          if (value.includes('~')) {
-            compatible = isSupportedCached(cssSel3, browsers);
-          }
-          if (value.includes('>') || value.includes('+')) {
-            compatible = isSupportedCached(cssSel2, browsers);
-          }
-        }
-        if (type === 'attribute' && node.attribute) {
-          // [foo]
-          if (!node.operator) {
-            compatible = isSupportedCached(cssSel2, browsers);
-          }
-          if (value) {
-            // [foo="bar"], [foo~="bar"], [foo|="bar"]
-            if (level2Sel.has(/** @type {string} */ (node.operator))) {
-              compatible = isSupportedCached(cssSel2, browsers);
-            }
-            // [foo^="bar"], [foo$="bar"], [foo*="bar"]
-            if (level3Sel.has(/** @type {string} */ (node.operator))) {
-              compatible = isSupportedCached(cssSel3, browsers);
-            }
-          }
-
-          // [foo="bar" i]
-          if (node.insensitive) {
-            compatible = isSupportedCached('css-case-insensitive', browsers);
-          }
-        }
-        if (!compatible) {
-          // If this node was not compatible,
-          // break out early from walking the rest
-          return false;
-        }
-      });
-    }).processSync(selector);
-    if (compatibilityCache) {
-      compatibilityCache.set(selector, compatible);
-    }
-    return compatible;
-  });
-}
-
-module.exports = { sameVendor, noVendor, pseudoElements, ensureCompatibility };