planning

node_modules/stringify-entities/lib/core.js

@@ -0,0 +1,58 @@
+'use strict'
+
+module.exports = encode
+
+// Encode special characters in `value`.
+function encode(value, options) {
+  value = value.replace(
+    options.subset ? charactersToExpression(options.subset) : /["&'<>`]/g,
+    basic
+  )
+
+  if (options.subset || options.escapeOnly) {
+    return value
+  }
+
+  return (
+    value
+      // Surrogate pairs.
+      .replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, surrogate)
+      // BMP control characters (C0 except for LF, CR, SP; DEL; and some more
+      // non-ASCII ones).
+      .replace(
+        // eslint-disable-next-line no-control-regex, unicorn/no-hex-escape
+        /[\x01-\t\v\f\x0E-\x1F\x7F\x81\x8D\x8F\x90\x9D\xA0-\uFFFF]/g,
+        basic
+      )
+  )
+
+  function surrogate(pair, index, all) {
+    return options.format(
+      (pair.charCodeAt(0) - 0xd800) * 0x400 +
+        pair.charCodeAt(1) -
+        0xdc00 +
+        0x10000,
+      all.charCodeAt(index + 2),
+      options
+    )
+  }
+
+  function basic(character, index, all) {
+    return options.format(
+      character.charCodeAt(0),
+      all.charCodeAt(index + 1),
+      options
+    )
+  }
+}
+
+function charactersToExpression(subset) {
+  var groups = []
+  var index = -1
+
+  while (++index < subset.length) {
+    groups.push(subset[index].replace(/[|\\{}()[\]^$+*?.]/g, '\\$&'))
+  }
+
+  return new RegExp('(?:' + groups.join('|') + ')', 'g')
+}