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

getProgramInfoLog(program)

Parameters

program

The WebGLProgram to query.

Return value

A string 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
# 5.14.9

Browser compatibility

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See also