v1.0 with SW PWA enabled

frontend/node_modules/@tailwindcss/typography/src/utils.js

@@ -0,0 +1,120 @@
+const parser = require('postcss-selector-parser')
+const parseSelector = parser()
+
+function isObject(value) {
+  return typeof value === 'object' && value !== null
+}
+
+function isPlainObject(value) {
+  if (typeof value !== 'object' || value === null) {
+    return false
+  }
+
+  if (Object.prototype.toString.call(value) !== '[object Object]') {
+    return false
+  }
+
+  if (Object.getPrototypeOf(value) === null) {
+    return true
+  }
+
+  let proto = value
+  while (Object.getPrototypeOf(proto) !== null) {
+    proto = Object.getPrototypeOf(proto)
+  }
+
+  return Object.getPrototypeOf(value) === proto
+}
+
+function merge(target, ...sources) {
+  if (!sources.length) return target
+  const source = sources.shift()
+
+  if (isObject(target) && isObject(source)) {
+    for (const key in source) {
+      if (Array.isArray(source[key])) {
+        if (!target[key]) target[key] = []
+        source[key].forEach((item, index) => {
+          if (isPlainObject(item) && isPlainObject(target[key][index])) {
+            target[key][index] = merge(target[key][index], item)
+          } else {
+            target[key][index] = item
+          }
+        })
+      } else if (isPlainObject(source[key])) {
+        if (!target[key]) target[key] = {}
+        merge(target[key], source[key])
+      } else {
+        target[key] = source[key]
+      }
+    }
+  }
+
+  return merge(target, ...sources)
+}
+
+function castArray(value) {
+  return Array.isArray(value) ? value : [value]
+}
+
+module.exports = {
+  isObject,
+  isPlainObject,
+  merge,
+  castArray,
+  isUsableColor(color, values) {
+    return isPlainObject(values) && color !== 'gray' && values[600]
+  },
+
+  /**
+   * @param {string} selector
+   */
+  commonTrailingPseudos(selector) {
+    let ast = parseSelector.astSync(selector)
+
+    /** @type {import('postcss-selector-parser').Pseudo[][]} */
+    let matrix = []
+
+    // Put the pseudo elements in reverse order in a sparse, column-major 2D array
+    for (let [i, sel] of ast.nodes.entries()) {
+      for (const [j, child] of [...sel.nodes].reverse().entries()) {
+        // We only care about pseudo elements
+        if (child.type !== 'pseudo' || !child.value.startsWith('::')) {
+          break
+        }
+
+        matrix[j] = matrix[j] || []
+        matrix[j][i] = child
+      }
+    }
+
+    let trailingPseudos = parser.selector()
+
+    // At this point the pseudo elements are in a column-major 2D array
+    // This means each row contains one "column" of pseudo elements from each selector
+    // We can compare all the pseudo elements in a row to see if they are the same
+    for (const pseudos of matrix) {
+      // It's a sparse 2D array so there are going to be holes in the rows
+      // We skip those
+      if (!pseudos) {
+        continue
+      }
+
+      let values = new Set(pseudos.map((p) => p.value))
+
+      // The pseudo elements are not the same
+      if (values.size > 1) {
+        break
+      }
+
+      pseudos.forEach((pseudo) => pseudo.remove())
+      trailingPseudos.prepend(pseudos[0])
+    }
+
+    if (trailingPseudos.nodes.length) {
+      return [trailingPseudos.toString(), ast.toString()]
+    }
+
+    return [null, selector]
+  },
+}