Script Error (js)

I have 1 error in this script.

function Update() {
    var mesh : Mesh= MeshRenderer.mesh;
    var colors : Color[] = mesh.colors;
    
    for (var i=0;i<colors.Length;i++) 
    {
      var _color : Color = colors*;*

_color.a = 1.0;
colors = _color;
}
mesh.colors = colors;
}
(2,31): BCE0019: ‘mesh’ is not a member of ‘UnityEngine.MeshRenderer’.
How to fix???

It’s a member of MeshFilter. Read the docs, this is well covered in the Mesh scripting reference.