isEventSupported() — react Function Reference

Architecture documentation for the isEventSupported() function in isEventSupported.js from the react codebase.

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BabelCompiler→ Validation→ isEventSupported() — react Function Reference

Dependency Diagram

graph TD
  849b528c_c7f4_c2eb_ce7a_1b4cea872d42["isEventSupported()"]
  c30b243e_ec29_69c6_2af4_f9dbe2733733["isEventSupported.js"]
  849b528c_c7f4_c2eb_ce7a_1b4cea872d42 -->|defined in| c30b243e_ec29_69c6_2af4_f9dbe2733733
  style 849b528c_c7f4_c2eb_ce7a_1b4cea872d42 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-dom-bindings/src/events/isEventSupported.js lines 25–40

function isEventSupported(eventNameSuffix: string): boolean {
  if (!canUseDOM) {
    return false;
  }

  const eventName = 'on' + eventNameSuffix;
  let isSupported = eventName in document;

  if (!isSupported) {
    const element = document.createElement('div');
    element.setAttribute(eventName, 'return;');
    isSupported = typeof (element: any)[eventName] === 'function';
  }

  return isSupported;
}