funcunit/site/node_modules/core-js/modules/$.math-log1p.js

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// 20.2.2.20 Math.log1p(x)
module.exports = Math.log1p || function log1p(x){
  return (x = +x) > -1e-8 && x < 1e-8 ? x - x * x / 2 : Math.log(1 + x);
};