WebGLRenderingContext.isShader

The WebGLRenderingContext.isShader() method of the WebGL API returns true if the passed WebGLShader is valid, false otherwise.

Syntax

GLboolean gl.isShader(shader);

Parameters

shader

A WebGLShader to check.

Return value

A GLboolean indicating whether or not the shader is valid.

Examples

Checking a shader

var canvas = document.getElementById('canvas');
var gl = canvas.getContext('webgl');
var shader = gl.createShader(gl.VERTEX_SHADER);

// ...

gl.isShader(shader);

Specifications

Specification	Status	Comment
WebGL 1.0 The definition of 'isShader' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0 The definition of 'glIsShader' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibility

See also

• WebGLRenderingContext.createShader()
• WebGLRenderingContext.deleteShader()