MicroGrad-JS/index.html at main · Shubbair/MicroGrad-JS · GitHub

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<!doctype html>
<html>
    <head>
        <title>MicroGrad Visualization</title>
        <script src="viz-standalone.js"></script>
        <script src="engine.js"></script>
        <link rel="stylesheet" type="text/css" href="style.css" />
    </head>
    <body>
        <div class="whole_area">
            <div class="code_area">
                <h2>Write Code Here...</h2>
                <textarea placeholder="code..." id="code" rows="14" cols="30" resize="none"></textarea>
                <button class="draw" onclick="show()">Forward</button>
                <button class="grad" onclick="back()">AutoGrad</button>
                <br></br>
            </div>
            <div class="presentation">
                <h2>Graph Result</h2>
                <div id="graph" class="graph"></div>
            </div>
        </div>
        <div class="rule">
            <h3>Rules : </h3>
            <p>* like Python statement : "x = 1" </p>
            <p>* Must ends with ';'</p>
            <p>* Activation functions are 'relu','sigmoid','tanh'</p>
        </div>
        <script>
            // function to get nodes and edges
            function trace(root) {
                // builds a set of all nodes and edges in a graph
                let nodes = new Set();
                let edges = new Set();

                function build(v) {
                    if (!nodes.has(v)) {
                        nodes.add(v);
                        for (let child of v.prev) {
                            edges.add([child, v]);
                            build(child);
                        }
                    }
                }

                build(root);
                return [nodes, edges];
            }

            // variable to track the number of Value class
            var operations_code = [];

            // class to handle user string code
            class OperationParser {
                constructor(code) {
                    this.code = code;
                    this.variables = {};
                }

                // parse the code and remove extra spaces
                parse() {
                    const lines = this.code
                      .split(";")
                      .map((line) => line.trim())
                      .filter((line) => line);

                    lines.forEach((line) => {
                      let [left, right] = line.split("=").map((part) => part.trim());
                      if (/[\w]+\.[\w]+\(/.test(right)) {
                        this.handleFunction(left, right);
                      } else {
                        this.handleAssignment(left, right);
                      }
                    });
                  }

                // if the code consist activation function
                // next step using only limited number of activations
                handleFunction(left, right) {
                    const match = right.match(/(\w+)\.(\w+)\(([^)]*)\)/);
                    if (match) {
                        const [, variable, func] = match;
                        const value = this.getValue(variable.trim());
                        const result = value[func]();
                        result.op = func;
                        result.label = left;
                        this.variables[left] = result;
                        operations_code.push(result);
                    } else {
                        window.alert(`Invalid function syntax: ${right}`);
                    }
                }

                handleAssignment(left, right) {
                  const operators = /([+\-*/^])/;
                   const parts = right.split(operators).map(part => part.trim());


                   if (parts.length > 1) {
                     let result;
                    if (parts[0] === "") {
                      console.log(parts);
                      result = this.getValue(parts[1]+parts[2]); // sign + value
                      parts.splice(0, 2);
                    } else {
                      result = this.getValue(parts[0]);
                    }
                     // let result = this.getValue(parts[0]);
                     for (let i = 1; i < parts.length; i += 2) {
                       const operator = parts[i];
                       const nextValue = this.getValue(parts[i+1]);
                       const methodMap = {
                         "+": "add",
                         "-": "sub",
                         "*": "mult",
                         "/": "div",
                         "^": "pow",
                       };
                       const method = methodMap[operator];
                       result = result[method](nextValue);
                     }
                     result.label = left;
                     this.variables[left] = result;
                     operations_code.push(result);
                   } else {
                     const value = this.getValue(right);
                     value.label = left;
                     this.variables[left] = value;
                     operations_code.push(value);
                   }
                 }

                // if the value not exist , create one
                getValue(operand) {
                    if (this.variables[operand]) {
                        return this.variables[operand];
                    } else if (!isNaN(parseFloat(operand))) {
                        return new Value(parseFloat(operand), operand);
                    } else {
                        window.alert(`Undefined variable: ${operand}`);
                    }
                }
            }

            function draw_graph(nodes,edges){
              var vv = "",
                  pp = "",
                  dd = "",
                  counter = 0;

              let dot = `digraph {
                      graph [rankdir=LR];
                      node [shape=record];
                  `;

              for (let n of nodes) {
                  let uid = `node${n.label}`;
                  if (n.label) {
                    dot += `"${uid}" [label="{ ${n.label} | data ${n.data.toFixed(4)} | grad ${n.grad.toFixed(4)} }"];\n`;
                  } else {
                    dot += `"${uid}" [label="{ data ${n.data.toFixed(4)} | grad ${n.grad.toFixed(4)} }"];\n`;
                  }
                  // Create node with label and data
                  // dot += `"${uid}" [label=" ${n.label} | data ${n.data.toFixed(4)} | grad ${n.grad.toFixed(4)} "];\n`;
                  if (n.op) {
                      // Create operation node
                      let opId = `op${n.label}${n.op}`;
                      dot += `"${opId}" [label="${n.op}", shape="circle"];\n`;
                      // Connect operation node to value node
                      dot += `"${opId}" -> "${uid}";\n`;
                  }
              }

              for (let [n1, n2] of edges) {
                  // Connect parent node to the operation node of the child node
                  let n1Id = `node${n1.label}`;
                  let n2OpId = `op${n2.label}${n2.op}`;
                  dot += `"${n1Id}" -> "${n2OpId}";\n`;
              }

              dot += `}`;
              return dot;
            }

            // after pressing the button
            function show() {
                operations_code = [];
                document.getElementById("graph").innerHTML = "";
                var text_code = document.getElementById("code").value;
                if(text_code !== ""){
                  const parser = new OperationParser(text_code);
                  parser.parse();

                  var last_item = operations_code.pop();

                  var [nodes, edges] = trace(last_item);

                  const nods = Array.from(nodes);
                  const edgs = Array.from(edges);

                  dot = draw_graph(nods,edgs);

                  Viz.instance().then(function (viz) {
                      var svg = viz.renderSVGElement(dot);

                      document.getElementById("graph").appendChild(svg);
                  });
              }else{
                    window.alert('Please Write Some Code!');
                  }
            }

            function back(){
              operations_code = [];
              document.getElementById("graph").innerHTML = "";
              var text_code = document.getElementById("code").value;
              if(text_code !== ""){
                const parser = new OperationParser(text_code);
                parser.parse();

                var last_item = operations_code.pop();
                last_item.backward();

                var [nodes, edges] = trace(last_item);

                const nods = Array.from(nodes);
                const edgs = Array.from(edges);

                dot = draw_graph(nods,edgs);

                Viz.instance().then(function (viz) {
                    var svg = viz.renderSVGElement(dot);

                    document.getElementById("graph").appendChild(svg);
                });
              }else{
                window.alert('Please Write Some Code!');
              }
            }
        </script>
    </body>
</html>