method

bun.PluginBuilder.onLoad

constraints: PluginConstraints,
callback: OnLoadCallback
): this;

Register a callback to load imports with a specific import specifier

@param constraints

The constraints to apply the plugin to

@param callback

The callback to handle the import

@returns

this for method chaining

Bun.plugin({
  setup(builder) {
    builder.onLoad({ filter: /^hello:world$/ }, (args) => {
      return { exports: { foo: "bar" }, loader: "object" };
    });
  },
});