Webgpu learning problem, encountered the create graphics pipeline state failed error

const pipeline = ({
             // Pipeline layout configuration
             layout: 'auto',
             // Vertex shader configuration
             vertex: {//Version-related configuration
                 module: ({code: vertex}),
                 entryPoint: "main",
                 buffers: [// All buffer module settings for vertex
                     {//One of the vertex buffer settings
                         arrayStride: 3*4,//The byte length occupied by a vertex data. A vertex in the buffer contains three components of xyz. Each number is a 4-byte floating point number, and 3*4-byte length
                         attributes: [{// Vertex Buffer Attribute
                             shaderLocation:0,//The vertex buffer marks the storage location on GPU video memory
                             format: "float32x3", //Format: loat32x3 means that a vertex data contains 3 32-bit floating point numbers
                             offset: 0//arrayStride represents the number of bytes interval between each group of vertex data, offset represents the number of deviation bytes for reading the shuffled. There is no special need to set 0.
                         }]
                     }
                 ]
             },
             // Fragment shader configuration
             fragment: {
                 module: ({code: fragment}),
                 entryPoint: "main",
                 targets: [{
                     format: format
                 }],
             },
             // Draw element configuration
             primitive: {
                 topology: "triangle-list",//Triangle drawing vertex data
             }
         });

//Version Shader Code
 const vertex = /*wgsl*/`
     @vertex
     fn main(@location(0) pos: vec3<f32>) -> @builtin(position) vec4<f32>{
         // var pos2 = vec4<f32>(pos,1.0);//pos to homogeneous coordinates
         // -= 0.2;//All vertices x coordinates are offset by 0.2
         // return pos2;//Return vertex data, use the next link of the rendering pipeline
         return vec4<f32>(pos,1.0);
     }
 `;