simple-squiggle

A restricted subset of Squiggle
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instanceof.js (232B)

      1 export default function _instanceof(left, right) {
      2   if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
      3     return !!right[Symbol.hasInstance](left);
      4   } else {
      5     return left instanceof right;
      6   }
      7 }