shader #version directive compile error

[exolution]

my shader content is

#version 300 es
attribute lowp vec4 a_vertexPosition;
attribute vec2 a_texturePosition;
varying vec2 v_texCoord;
void main() {
gl_Position = a_vertexPosition;
v_texCoord = a_texturePosition;
}

when i compile this shader it throws error

ERROR: 0:2: 'version' : #version directive must occur before anything else, except for comments and white space

I am sure that in the shader text passed to gl.shaderSource, there are no characters before this version directive.

[army8735]

+1