GPUCompilationMessage: linePos property

{{APIRef("WebGPU API")}}{{SecureContext_Header}}{{AvailableInWorkers}}

The linePos read-only property of the {{domxref("GPUCompilationMessage")}} interface is a number representing the position in the code line that the message corresponds to. This could be an exact point, or the start of the relevant substring.

Value

A number.

To be precise, linePos is the number of {{glossary("UTF-16", "UTF-16 code units")}} from the beginning of the line to the exact point or start of the relevant substring that the message corresponds to.

Note that:

• If the message corresponds to a substring, linePos refers to the first UTF-16 code unit of the substring.
• If the message does not correspond to a specific code position (perhaps it refers to the whole of the shader code), linePos will be 0.
• Values are one-based — a value of 1 refers to the first code unit of the line.

Examples

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

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

See the main GPUCompilationInfo page for a more detailed example.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• The WebGPU API