@Babel/Types Framework in the Java Library's use finger

@Babel/Types Framework in the Java Class Library ## profile @Babel/Types is a Java class library for operation, traversing and generating JavaScript AST (abstract syntax tree).AST is the structured of the source code that it can help us analyze, convect and generate the JavaScript code.@Babel/Types provides a series of APIs that make operations and creation AST simple and reliable. ## Install First, you need to add the dependence of `@babel/types` to your project.You can add dependencies through Maven, Gradle or manually downloading jar package. Maven dependence: <dependency> <groupId>org.babel</groupId> <artifactId>babel-types</artifactId> <version>1.0.0</version> </dependency> Gradle dependencies: groovy implementation 'org.babel:babel-types:1.0.0' ## Use examples Here are some examples of@Babel/Types: ### Create AST node You can use@Babel/Types to create JavaScript AST nodes.For example, the example code of creating a VariableDeclaration node is as follows: as follows: as follows: import org.babel.types.type.VariableDeclaration; import org.babel.types.type.VariableDeclarator; import org.babel.types.type.Identifier; import org.babel.types.constant.DeclarationKind; Identifier identifier = new Identifier("myVariable"); VariableDeclarator declarator = new VariableDeclarator(identifier, null); VariableDeclaration declaration = new VariableDeclaration(DeclarationKind.VAR, Collections.singletonList(declarator)); ### Modify AST node @Babel/Types also provides the function of modifying the AST node.For example, modify the VARILABLEDECLALATION node in the above example to let declare, the code is as follows: import org.babel.types.constant.DeclarationKind; declaration.setKind(DeclarationKind.LET); ### Traversing AST @Babel/Types provides AST's traversal function. You can use Visitor mode to traverse and operate AST.The following is an example of traversal AST: import org.babel.types.visitor.NodeVisitor; public class MyVisitor implements NodeVisitor { @Override public void visit(VariableDeclaration declaration) { // The operation that is executed when traversing the VariableDeclaration node // ... } // Add other visit methods here to cover the node type that needs to be traveled } Example: MyVisitor visitor = new MyVisitor(); declaration.accept(visitor); ### JavaScript code @Babel/Types also supports the function of converting AST nodes back to JavaScript code.For example, convert the VariableDeclaration node in the above example into an example of a code string: import org.babel.types.generator.Generator; Generator generator = new Generator(); String code = generator.generate(declaration); System.out.println (code); // Output: Let myvariable; ## Summarize @Babel/Types framework makes it simple and convenient to operate, traverse and generate JavaScript AST in Java.By creating, modifying, traversing, and generating AST nodes, you can easily analyze, convert and generate JavaScript code.I hope this article will help you when you use the@Babel/Types framework!