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
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 9 | 12 | 4.0 (2.0) | 11 | 12 | 5.1 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|
Basic support | ? | 25 | 4.0 (2.0) | 1.0 | ? | 12 | 8.0 |