5.html

<!DOCTYPE>
<html>
<head>
    <title>TEST</title>
</head>
<body>
<script>
// 我们怎么加载一个js？
function require(path, cb) {
    const script = document.createElement('script')
    script.src = path
    script.onload = function () {
        cb(require._[path])
    }
    document.body.appendChild(script)
}
require._ = {}

// 实现一个对应的define
function define(path, factory) {
    let module
    if (typeof factory === 'function') {
        module = factory()
    }
    module = factory
    require._[path] = module
}

require('./cases/5.require-have-name.js', function (mod) {
    console.log(mod)
})
</script>
</body>