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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 function in the @babel/types library that creates an AST node for a variable declaration in JavaScript.

ClassFile.js

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      }
    }
  }
}
let tmp = types.variableDeclaration("var", [
  types.variableDeclarator(
    types.identifier("$$dbClassInfo"),
    literalValueToExpression(copyInfo)
  )
]);

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+ 21 other calls in file

index.ts

GitHub: n9e/fe-v5

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    true,
  );
  let objectPattern = t.objectPattern([objectProperty]);
  let callee = t.identifier(USE_TRANSLATION_FUN);
  let useTranslationCall = t.callExpression(callee, []);
  let tDeclarator = t.variableDeclarator(objectPattern, useTranslationCall);
  const node = t.variableDeclaration('const', [tDeclarator]);
  return node;
};

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+ 31 other calls in file

How does @babel/types.variableDeclarator work?

@babel/types.variableDeclarator is a function provided by the @babel/types library that allows you to create an AST node for a variable declaration in JavaScript. To use @babel/types.variableDeclarator, you 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 functions 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.

ast_enc.js

GitHub: kuizuo/js-de-obfuscator

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/**
 * 构建数组声明语句，并加入到ast最开始处
 */
unshiftArrayDeclaration() {
  let varDeclarator = t.variableDeclarator(t.identifier('kz_arr'), t.arrayExpression(this.bigArr))
  this.bigArr = t.variableDeclaration('const', [varDeclarator])
  this.ast.program.body.unshift(this.bigArr)

  // 调用浏览器的atob base64解码函数 就需要添加自定义解密函数

+ 23 other calls in file

platform-plugin.js

GitHub: raxjs/miniapp

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  kuaishou: 'isKuaiShouMiniProgram'
};

function variableDeclarationMethod(name, value) {
  return t.variableDeclaration('const', [
    t.variableDeclarator(t.identifier(name), t.booleanLiteral(value))
  ]);
}

/**

+ 3 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

parseScript.js

GitHub: egoist/styled-vue

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}

// var v0 = vm => vm.color
varDeclarations.push(
  t.variableDeclaration('var', [
    t.variableDeclarator(t.identifier(variableId), quasi.expressions[i])
  ])
)

// { '--v0': v0(vm) }

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+ 15 other calls in file

extractNode.js

GitHub: ladifire-opensource/stylex

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  path.scope.path.ensureBlock();
}

path.getStatementParent().insertBefore(
  t.variableDeclaration('const', [
    t.variableDeclarator(t.identifier(name), node)
  ])
);

return t.identifier(name);

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index.js

GitHub: SheikhSajid/jsx2svelte

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stateVariableName = lVal.elements[0].name;
setterFunctionName = lVal.elements[1].name;

const argNode = callExprPath.node.arguments[0];

const vDectr = t.variableDeclarator(
  t.identifier(stateVariableName),
  argNode
);

+ 19 other calls in file

1.%E6%B5%81%E7%A8%8B%E5%B9%B3%E5%9D%A6%E5%8C%96.js

GitHub: tianmingbo/GOOD-GOOD-STUDY

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let index = path.scope.generateUidIdentifier('index');
let callee = t.memberExpression(t.stringLiteral(dispenserStr), t.identifier('split'));
//拼装split
let arrayInit = t.callExpression(callee, [t.stringLiteral('|')]);
//_array
let varArray = t.variableDeclarator(array, arrayInit);
//_index
let varIndex = t.variableDeclarator(index, t.numericLiteral(0));
//let
let dispenser = t.variableDeclaration('let', [varArray, varIndex]);

+ 23 other calls in file

1.%E6%B5%81%E7%A8%8B%E5%B9%B3%E5%9D%A6%E5%8C%96.js

GitHub: tianmingbo/GOOD-GOOD-STUDY

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//拼装split
let arrayInit = t.callExpression(callee, [t.stringLiteral('|')]);
//_array
let varArray = t.variableDeclarator(array, arrayInit);
//_index
let varIndex = t.variableDeclarator(index, t.numericLiteral(0));
//let
let dispenser = t.variableDeclaration('let', [varArray, varIndex]);
//拼装switch (+_array[_index++])
let uptExp = t.updateExpression('++', index);

+ 7 other calls in file

DomBuilder.js

GitHub: shnhrrsn/babel-plugin-transform-dom

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)

let variableDeclarator = null

if(this.replaceWithSequence) {
        variableDeclarator = t.variableDeclarator(this.element)

        this.statements.push(t.assignmentExpression(
                '=',
                this.element,

+ 15 other calls in file

parseScript.js

GitHub: whjvenyl/styled-vue

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}

// var v0 = vm => vm.color
varDeclarations.push(
  t.variableDeclaration('var', [
    t.variableDeclarator(t.identifier(`v${i}`), quasi.expressions[i])
  ])
)

// { '--v0': v0(vm, existing) }

+ 8 other calls in file

index.js

GitHub: babel-utils/babel-explode-module

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  declaration /*: Node */
) => {
  return Object.assign(
    t.variableDeclaration(kind, [
      Object.assign(
        t.variableDeclarator(t.identifier(name), t.toExpression(declaration)),
        location(declaration)
      ),
    ]),
    location(declaration),

+ 9 other calls in file

index.js

GitHub: openapi/preset-effector

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const contract = responses[code].content
  ? createContract(responses[code].content['application/json'].schema)
  : createNullContract();
const ast = t.exportNamedDeclaration(
  t.variableDeclaration('const', [
    t.variableDeclarator(t.identifier(contractName), contract),
  ]),
);
if (responses[code].description) {
  addComment(ast, responses[code].description);

+ 11 other calls in file

napkin.js

GitHub: KinoAR/LunaTeaNapkin

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  if (init && init.object && init.object.name === "_$LTGlobals_$") {
    const {
      property
    } = init;
    const newExpression = tt.variableDeclarator(tt.identifier(id.name), tt.identifier(property.name));
    return newExpression;
  }
}

expressionHelpers.js

GitHub: N0taN3rd/Emu

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  )
}

static declarePropGetterWinXProto (kind, name, x, prop) {
  return btypes.variableDeclaration(kind, [
    btypes.variableDeclarator(
      EH.makeIdentifier(name),
      btypes.callExpression(rewriterProps.getOGetter, [
        EH.windowXprototype(x),
        btypes.stringLiteral(prop)

+ 35 other calls in file

actions.ts

GitHub: suchipi/tofu

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name: 'for',
label: 'for...of',
create: (child = t.blockStatement([t.emptyStatement()])) =>
  t.forOfStatement(
    t.variableDeclaration('const', [
      t.variableDeclarator(t.identifier('item'))
    ]),
    t.identifier('iterable'),
    child
  ),

+ 11 other calls in file

uniq-imports.js

GitHub: markdown-doc/react-markdown-doc-loader

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function declareVariable(id, init) {
  return types.variableDeclaration(
    'const',
    [
      types.variableDeclarator(types.identifier(id), types.identifier(init))
    ]
  );
}

convertTests.js

GitHub: N0taN3rd/chrome-remote-interface-extra

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  result = btypes.identifier(`testResult`)
}
clonedPath.arguments[0] = result
path.insertBefore(
  btypes.variableDeclaration('const', [
    btypes.variableDeclarator(result, awaitexpr)
  ])
)
path.replaceWith(clonedPath)
wasChange = true

JSConcatPackager.js

GitHub: EnixCoda/TeslaPlayback

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  }
}

let executed = getName(asset, 'executed');
decls.push(
  t.variableDeclarator(t.identifier(executed), t.booleanLiteral(false))
);

let init = t.functionDeclaration(
  getIdentifier(asset, 'init'),

index.js

GitHub: Raton001/E-commerce-Rest-API

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    declar._blockHoist = blockHoist;
    [declarPath] = path.unshiftContainer("body", [declar]);
    if (!unique) path.setData(dataKey, declarPath);
  }

  const declarator = t.variableDeclarator(opts.id, opts.init);
  declarPath.node.declarations.push(declarator);
  this.registerBinding(kind, declarPath.get("declarations").pop());
}

+ 16 other calls in file

Other functions in @babel/types

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@babel/types.identifier is the most popular function in @babel/types (20936 examples)

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