WebGLRenderingContext.getProgramInfoLog()

The WebGLRenderingContext.getProgramInfoLog returns the information log for the specified WebGLProgram object. It contains errors that occurred during failed linking or validation of WebGLProgram objects.

Syntax

gl.getProgramInfoLog(program);

Parameters

program

The WebGLProgram to query.

Return value

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

Examples

Checking program errors

var program = gl.createProgram();

// Attach pre-existing shaders
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);

gl.linkProgram(program);

gl.getProgramInfoLog(program);

Specifications

Specification
WebGL Specification (WebGL)
# 5.14.9

Browser compatibility

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See also