WebGLRenderingContext: getShaderInfoLog() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨July 2015⁩.

Note: This feature is available in Web Workers.

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

A string 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);
const message = gl.getShaderInfoLog(shader);
if (message.length > 0) {
 /* message may be an error or a warning */
 throw message;
}