Function describeComponentFrame

code/new-context-api/public/app.js:3206–3208

(name, source, ownerName)

var ReactDebugCurrentFrame = ReactInternals.ReactDebugCurrentFrame;

var describeComponentFrame = function (name, source, ownerName) {
  return '\n    in ' + (name || 'Unknown') + (source ? ' (at ' + source.fileName.replace(/^.*[\\\/]/, '') + ':' + source.lineNumber + ')' : ownerName ? ' (created by ' + ownerName + ')' : '');
};

// The Symbol used to tag the ReactElement-like types. If there is no native Symbol
// nor polyfill, then a plain number is used for performance.