Uncaught ReferenceError: h is not defined

[Sanshain]

Following trouble is possible in runtime:

Uncaught ReferenceError: h is not defined

Solutions (to choose from):

• Hard way: Put h imports to each jsx file like this:

  import { h } from 'preact';

• Recomended way: Set "runtime" option of @babel/transform-react-jsx plugin to automatic like this:

  [
    "@babel/transform-react-jsx",
    {
      // "pragma": "h",
      // "pragmaFrag": "Fragment",
      "runtime": "automatic",
      "importSource": "preact"   
    }
  ]

  Attention: don't use pragma* options while use "runtime": "automatic". Because it may cause some troubles: pragma and pragmaFrag cannot be set when runtime is automatic