three.js/examples/jsm/shaders/BasicShader.js

/**
 * Simple test shader
 */

var BasicShader = {

	uniforms: {},

	vertexShader: [

		'void main() {',

		'	gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );',

		'}'

	].join( '\n' ),

	fragmentShader: [

		'void main() {',

		'	gl_FragColor = vec4( 1.0, 0.0, 0.0, 0.5 );',

		'}'

	].join( '\n' )

};

export { BasicShader };