How to use the isVariableDeclarationList function from typescript

Find comprehensive JavaScript typescript.isVariableDeclarationList code examples handpicked from public code repositorys.

typescript.isVariableDeclarationList is a function provided by the TypeScript compiler API that determines whether a given node in a TypeScript abstract syntax tree (AST) represents a variable declaration list.

completedDocsRule.js

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function variableIsAfterFirstInDeclarationList(node) {
    var parent = node.parent;
    if (parent === undefined) {
        return false;
    }
    return ts.isVariableDeclarationList(parent) && node !== parent.declarations[0];
}
function describeDocumentationFailure(node, docType) {
    var description = Rule.FAILURE_STRING_EXIST;
    if (node.modifiers !== undefined) {

How does typescript.isVariableDeclarationList work?

typescript.isVariableDeclarationList is a function provided by the TypeScript compiler API that determines whether a given node in a TypeScript abstract syntax tree (AST) represents a variable declaration list. When called with a TypeScript AST node as its argument, isVariableDeclarationList checks whether the node is an instance of the VariableDeclarationList class in the TypeScript API. If the node is an instance of VariableDeclarationList, the function returns true; otherwise, it returns false. VariableDeclarationList is a TypeScript AST class that represents a list of variable declarations, which can be used to define multiple variables of the same type at once. Overall, typescript.isVariableDeclarationList provides a way to check whether a given AST node represents a variable declaration list, which can be useful in cases where you need to perform operations or transformations on specific types of nodes in a TypeScript AST.

Ai Example

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import ts from "typescript";

function processNode(node: ts.Node) {
  if (ts.isVariableDeclarationList(node)) {
    console.log("Found a variable declaration list:", node);
  } else {
    console.log("Not a variable declaration list:", node);
  }
}

const code = `
const a = 1, b = 2, c = 3;
`;

const sourceFile = ts.createSourceFile(
  "example.ts",
  code,
  ts.ScriptTarget.Latest
);
ts.forEachChild(sourceFile, processNode);

In this example, we use typescript.isVariableDeclarationList to check whether each node in a TypeScript AST represents a variable declaration list. We define a function, processNode, that takes in a TypeScript AST node and checks whether it is an instance of VariableDeclarationList using the isVariableDeclarationList function. We then create a TypeScript source file from a code string using the createSourceFile function provided by the TypeScript API, and call forEachChild to iterate over each node in the AST. For each node, we call the processNode function to check whether it represents a variable declaration list. If the node is a variable declaration list, we log a message to the console indicating that we have found one. Note that in order to use typescript.isVariableDeclarationList, you need to have the TypeScript compiler API installed and imported in your application.

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