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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
WebGLShaderto 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 |