transform-react-jsx 中的 "pragma h" 是什么?

What is "pragma h" in transform-react-jsx?

我在这里遇到了这个配置https://github.com/developit/zero-to-preact/blob/master/webpack.config.js

plugins: [
    ['transform-react-jsx', { pragma: 'h' }]
]

文档说

pragma

string, defaults to React.createElement.

Replace the function used when compiling JSX expressions.

Note that the @jsx React.DOM pragma has been deprecated as of React v0.12

但不知道 'h' 是什么意思!这是什么?

默认情况下,babel 等会将 <div id="hello" /> 转换为 React.createElement("div", { id: "hello" });pragma: h 将改为生成,如 h("div", { id: "hello" });.

React.createElement(或 Preact 的 h)是构建虚拟 DOM.

的函数