How to use the VariableDeclarator function from @babel/types

Find comprehensive JavaScript @babel/types.VariableDeclarator code examples handpicked from public code repositorys.

@babel/types.VariableDeclarator is a class in the @babel/types library that represents a variable declaration in the abstract syntax tree (AST) of a JavaScript program.

dec_main.js

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let paramsList=node_exp.callee.params//形参列表
if(paramsList.length>0){
    paramsList.map(function (letname){
        if(t.isIdentifier(letname)){
            //定义一个变量，并添加到结构体中
            let varDec = t.VariableDeclarator(t.identifier(letname.name))//
            let localAST = t.VariableDeclaration('var', [varDec]);//
            node_exp.callee.body.body.unshift(localAST);//添加
        }
    })

index.js

GitHub: infernojs/babel-plugin-inferno

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} else if (!opts.pragma) {
  var varArray = [];

  if (fileState.has('createVNode')) {
    varArray.push(
      t.VariableDeclarator(
        t.Identifier('createVNode'),
        t.memberExpression(t.identifier('Inferno'), t.identifier('createVNode'))
      )
    );

+ 9 other calls in file

How does @babel/types.VariableDeclarator work?

@babel/types.VariableDeclarator is a class provided by the @babel/types library that represents a variable declaration in the abstract syntax tree (AST) of a JavaScript program. To use @babel/types.VariableDeclarator, you create a new instance of the class and pass in two arguments: an identifier for the variable and an expression for the variable's initial value. The identifier is created using the @babel/types.identifier function, which takes a string as an argument and returns an identifier AST node. The expression for the variable's initial value can be any valid JavaScript expression, such as a literal value or a function call. Once you have created a VariableDeclarator object using @babel/types.VariableDeclarator, you can use it to create an AST node for a variable declaration statement using the @babel/types.variableDeclaration function. @babel/types.VariableDeclarator is one of many classes provided by the @babel/types library that simplify working with abstract syntax trees in JavaScript. It is particularly useful when you need to programmatically create JavaScript code or manipulate existing code by working with AST nodes.

Transformer.js

GitHub: yklydxtt/react-class-to-fc

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}
const params = node.params ? node.params : node.value.params
if (node.value && node.value.type === 'ArrowFunctionExpression') {
  this.componentBody.push(
    t.VariableDeclaration('const', [
      t.VariableDeclarator(node.key, node.value)
    ])
  )
  return
}

+ 5 other calls in file

AST%E6%90%9E%E5%AE%9Ai18n.md?plain=1

GitHub: guguji5/demo

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const Identifier = t.Identifier('habit')
const callee = t.Identifier('t')
const arguments =t.StringLiteral('running')
const CallExpression = t.CallExpression(callee, [arguments])
const VariableDeclarator = t.VariableDeclarator(Identifier, CallExpression)
const variableDeclaration = t.variableDeclaration('const',[VariableDeclarator])
const output = generate(variableDeclaration);
console.log(output.code);   // 输出 const habit = t("running");
```

+ 13 other calls in file

Ai Example

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const t = require("@babel/types");

const variableIdentifier = t.identifier("myVariable");
const variableValue = t.stringLiteral("Hello, world!");
const variableDeclarator = t.variableDeclarator(
  variableIdentifier,
  variableValue
);

console.log(variableDeclarator);

In this example, we first import the @babel/types library and define an identifier for the variable and a string literal for its initial value. We then use @babel/types.VariableDeclarator to create a variableDeclarator object, passing in the identifier and string literal as arguments. Finally, we log the resulting variableDeclarator object to the console using console.log. When you run this code, you should see an AST node for a variable declarator logged to the console, which should look something like this: bash Copy code

restoreJSUtils.js

GitHub: zhangdaren/miniprogram-to-uniapp

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    // path.skip();




    //如果是 var a = new getApp();
    if (isNewExpression && path) {
        var newPath = t.VariableDeclarator(t.identifier(id.node.name), t.callExpression(t.identifier("getApp"), []))
        path.replaceWith(newPath)
    }
}

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