rollup-plugin-glsl-loader/tsconfig.json

import your shader file using ES modules.

{
  "compilerOptions": {
    "module": "ESNext",
    "target": "ESNext",
    "noImplicitAny": false,
    "sourceMap": false,
    "noUnusedLocals": false,
    "allowJs": true,
    "moduleResolution": "Node",
    "resolveJsonModule": true,
    "lib": [
      "es5",
      "es2015.promise",
    ],
    "declaration": true,
    "declarationDir": "types",
    "allowSyntheticDefaultImports": true
  },
  "exclude": [
    "node_modules",
  ],
  "include": [
    "src",
  ]
}