WebGLRenderingContext.getShaderInfoLog()

The WebGLRenderingContext.getShaderInfoLog returns the information log for the specified WebGLShader object. It contains warnings, debugging and compile information.

Syntax

gl.getShaderInfoLog(shader);

Parameters

shader

A WebGLShader to query.

Return value

A DOMString that contains diagnostic messages, warning messages, and other information about the last compile operation. When a WebGLShader object is initially created, its information log will be a string of length 0.

Examples

Checking compilation messages

/* load shader source code. */
gl.shaderSource(shader, shaderCode);

/* compile shader source code. */
gl.compileShader(shader);

var message = gl.getShaderInfoLog(shader);

if (message.length > 0) {
  /* message may be an error or a warning */
  throw message;
}

Specifications

Browser compatibility

See also

• WebGLRenderingContext.getShaderParameter() – used with gl.COMPILE_STATUS to check for a failed compile.
• WebGLRenderingContext.getError()