GPUCompilationInfo

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

The GPUCompilationInfo interface of the WebGPU API represents an array of GPUCompilationMessage objects generated by the GPU shader module compiler to help diagnose problems with shader code.

GPUCompilationInfo is accessed via GPUShaderModule.getCompilationInfo().

Instance properties

messages Experimental Read only

An array of GPUCompilationMessage objects, each one containing the details of an individual shader compilation message. Messages can be informational, warnings, or errors.

Examples

In the example below, we have deliberately left a parenthesis out of a function declaration in our shader code:

js
const shaders = `
struct VertexOut {
  @builtin(position) position : vec4f,
  @location(0) color : vec4f
}

@vertex
fn vertex_main(@location(0) position: vec4f,
               @location(1) color: vec4f -> VertexOut
{
  var output : VertexOut;
  output.position = position;
  output.color = color;
  return output;
}

@fragment
fn fragment_main(fragData: VertexOut) -> @location(0) vec4f
{
  return fragData.color;
}
`;

When we compile the shader module, we use getCompilationInfo() to grab some information about the resulting error:

js
async function init() {
  // ...

  const shaderModule = device.createShaderModule({
    code: shaders,
  });

  const shaderInfo = await shaderModule.getCompilationInfo();
  const firstMessage = shaderInfo.messages[0];

  console.log(firstMessage.lineNum); // 9
  console.log(firstMessage.message); // "expected ')' for function declaration"
  console.log(firstMessage.type); // "error"
  // ...
}

Specifications

Specification
WebGPU
# gpucompilationinfo

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
GPUCompilationInfo
Experimental
messages
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
Partial support
Partial support
In development. Supported in a pre-release version.
In development. Supported in a pre-release version.
No support
No support
Experimental. Expect behavior to change in the future.
See implementation notes.

See also