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How to use the expressionStatement function from @babel/types

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

@babel/types.expressionStatement is a tool that represents an expression statement in a JavaScript program.

ClassFile.js

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tmp = babylon.parse(
  t.__className + ".$$dbClassInfo = $$dbClassInfo;"
).program.body;
inject.push(tmp[0]);
let block = types.blockStatement(inject);
let rootFn = types.expressionStatement(
  types.callExpression(
    types.functionExpression(null, [], block),
    []
  )

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758

+ 21 other calls in file

moduleExports.js

GitHub: browserslist/caniuse-lite

-2

452

+ 7 other calls in file

How does @babel/types.expressionStatement work?

@babel/types.expressionStatement is a utility function provided by the Babel compiler that represents an expression statement in a JavaScript program. In JavaScript, an expression statement is any statement that evaluates an expression, such as a function call or an assignment. To use @babel/types.expressionStatement, developers first import the function from the @babel/types library. They can then call the function with an expression node as an argument to create a new expression statement node. For example, consider the following JavaScript code: javascript Copy code {{{{{{{ const x = 10; This code includes an expression statement that assigns the value 10 to the variable x. The corresponding AST node for this expression statement could be created using @babel/types.expressionStatement as follows: javascript Copy code {{{{{{{ class="!whitespace-pre hljs language-javascript">const t = require('@babel/types'); const assignment = t.assignmentExpression('=', t.identifier('x'), t.numericLiteral(10)); const expressionStatement = t.expressionStatement(assignment); console.log(expressionStatement); Here, we first import the @babel/types library and create two AST nodes using the t.identifier and t.numericLiteral functions. We then create an AssignmentExpression node using the t.assignmentExpression function, which represents the assignment x = 10. We then create a new ExpressionStatement node using the t.expressionStatement function and pass the AssignmentExpression node as an argument. This creates an expression statement that evaluates the AssignmentExpression and assigns its value to x. Finally, we log the resulting expression statement node to the console: javascript Copy code {{{{{{{ class="!whitespace-pre hljs language-javascript">ExpressionStatement { type: 'ExpressionStatement', expression: AssignmentExpression { type: 'AssignmentExpression', operator: '=', left: Identifier { type: 'Identifier', name: 'x' }, right: NumericLiteral { type: 'NumericLiteral', value: 10 } } } This demonstrates how @babel/types.expressionStatement can be used to create an expression statement node for a JavaScript program, which represents a statement that evaluates an expression.

sdk.js

GitHub: tencent-connect/bot-node-sdk

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if (path.isClassMethod() && path.node.key.name === 'register') {
  path
    .get('body')
    .pushContainer(
      'body',
      t.expressionStatement(
        t.assignmentExpression(
          '=',
          t.memberExpression(t.identifier('client'), t.identifier(apiInstanceName)),
          t.newExpression(t.identifier(apiClassName), [

+ 5 other calls in file

Transformer.js

GitHub: yklydxtt/react-class-to-fc

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    this.outerExpress.push(statement)
  })
} else if (methodName === 'componentDidMount') {
  // 处理componentDidMount
  this.collectHooks('useEffect')
  const expression = t.expressionStatement(
    t.callExpression(t.identifier('useEffect'), [
      this.createArrowFn(node),
      t.arrayExpression([])
    ])

+ 17 other calls in file

Ai Example

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

const callExpression = t.callExpression(t.identifier("console.log"), [
  t.stringLiteral("Hello, world!"),
]);
const expressionStatement = t.expressionStatement(callExpression);

console.log(expressionStatement);

In this example, we first import the @babel/types library and create two AST nodes using the t.identifier and t.stringLiteral functions. We then create a CallExpression node using the t.callExpression function, which represents the function call console.log('Hello, world!'). We then create a new ExpressionStatement node using the t.expressionStatement function and pass the CallExpression node as an argument. This creates an expression statement that evaluates the CallExpression and logs the string 'Hello, world!' to the console. Finally, we log the resulting expression statement node to the console: javascript Copy code

swagql.js

GitHub: groupon/swagql

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  FETCH: t.identifier('FETCH'),
  VERIFY_AUTH_STATUS: t.identifier('VERIFY_AUTH_STATUS'),
});
const body = [
  t.expressionStatement(t.stringLiteral('use strict')),
  this.builtins.ast,
  ...[].concat(prefix),
  ...this.inputTypes.astNodes,
  ...this.outputTypes.astNodes,

strict-plugin.js

GitHub: NPellet/visualizer

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    if (spath.length === 4 && spath[3].startsWith('arguments')) {
      path
        .get('body')
        .unshiftContainer(
          'body',
          t.expressionStatement(t.stringLiteral('use strict'))
        );
    }
  }
});

+ 3 other calls in file

es5toes6.js

GitHub: 2833844911/cy_jsvmp

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var body = [];

if (isduo === 1){
    for (let i =0; i< isduolist.length; i++){
        body.push(
            tee.expressionStatement(tee.assignmentExpression("=", isduolist[i], tee.memberExpression(tee.memberExpression(path.node.right, tee.identifier("cbbiyhh"),true,false),   tee.numericLiteral(i),true,false)))

        )
    }
}else{

+ 15 other calls in file

code.js

GitHub: alijk-fe/motor-rax

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const updatePropsArgs = [
  argPIDExp,
  t.objectExpression(propMaps)
];
const callUpdateProps = t.expressionStatement(t.callExpression(updateProps, updatePropsArgs));
if (propMaps.length > 0) {
  const targetNode = parentNode || fnBody;
  if (t.isReturnStatement(targetNode[targetNode.length - 1])) {
    targetNode.splice(targetNode.length - 1, 0, callUpdateProps);

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visitorar.js

GitHub: zhangdaren/miniprogram-to-uniapp

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    // global.log('移除逗号表达式')
    return {
        ExpressionStatement (path) {
            const { expression } = path.node
            if (!t.isSequenceExpression(expression)) return
            const body = expression.expressions.map((express) => t.expressionStatement(express))
            path.replaceInline(body)
        },
    }
},

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+ 7 other calls in file

index.js

GitHub: SheikhSajid/jsx2svelte

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  const asnExp = t.assignmentExpression(
    '=',
    bodyNode.declarations[0].id,
    bodyNode.declarations[0].init
  );
  const exprStmnt = t.expressionStatement(asnExp);
  reactiveLabel = t.labeledStatement($, exprStmnt);
} else if (t.isStatement(bodyNode)) {
  reactiveLabel = t.labeledStatement($, bodyNode);
} else {

+ 9 other calls in file

expressionHelpers.js

GitHub: N0taN3rd/Emu

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    EH.ensureBlockStatement(body)
  )
}

static xEqRewritterCall (x, call, params) {
  return btypes.expressionStatement(
    btypes.assignmentExpression(
      '=',
      x,
      btypes.callExpression(call, checkParams(params))

+ 23 other calls in file

pswitch.js

GitHub: 2833844911/cy_jsvmp

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// 构建躯体
function gitBody(data){
    var body = tee.expressionStatement(tee.callExpression(tee.functionExpression(null,[],tee.blockStatement(
        data
    )), []))
    return body;
}

xsParser.js

GitHub: msojocs/wcc.js

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  wccError = new error.WccError(error.CODE.INVALID_THIS, message);
  path.stop();
  return;
} else if (!path.node._wcc_handled) {

  let thisNode = babelTypes.expressionStatement(
    babelTypes.conditionalExpression(
      babelTypes.binaryExpression(
        "===",
        babelTypes.memberExpression(

+ 5 other calls in file

main.js

GitHub: Alanhays/ast-decode

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        canBeRemoved = false;
        break;
    }
    let item = newMap.get(curKey)
    if (types.isFunctionExpression(item)) {
        item = types.expressionStatement(item)
    }
    // console.log(parentPath.toString() + "\n-->\n" + generator(item).code + "\n")
    parentPath.replaceInline(item);
}

+ 136 other calls in file

generate-expression.js

GitHub: johanholmerin/style9

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if (stringBuffer !== '') {
  simplifiedConditionals.push(t.stringLiteral(stringBuffer));
}

if (simplifiedConditionals.length === 0) {
  return t.expressionStatement(t.stringLiteral(''));
}

const binaryExpression = simplifiedConditionals.reduceRight((acc, expr) => {
  return t.binaryExpression('+', expr, acc);

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+ 3 other calls in file

generate-expression.js

GitHub: adityavs/style9

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  const additions = conditionals.reduceRight((acc, expr) => {
    return t.binaryExpression('+', expr, acc)
  });

  return t.expressionStatement(additions);
}

module.exports = generateExpression;

+ 3 other calls in file

vueConfig.js

GitHub: wsrh8888/vue-cli-plugin-xuwu

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    ),
    types.stringLiteral('test')
  )
),
types.blockStatement([
  types.expressionStatement(
    types.assignmentExpression(
      '=',
      types.identifier('base'),
      types.stringLiteral('/')

+ 7 other calls in file

model.js

GitHub: chengzhuo5/babel-plugin-react-directives

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    });
    statements = mergeResult.statements;
    result = mergeResult.result;
  }

  return [...statements, t.expressionStatement(t.callExpression(updateFn, [result]))];
}

/**
 * 设置value prop

+ 15 other calls in file

taro-declarate.js

GitHub: chuhui1/vueToReact

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    const jsxElement = t.jsxElement(openingElement, null, [], true)
    const CallExpression = t.callExpression(t.memberExpression(t.Identifier('document'), t.identifier('getElementById')), [t.stringLiteral('app')])
    arguments.push(jsxElement)
    arguments.push(CallExpression)
    const expression = t.callExpression(callee, arguments)
    const ExpressionStatementTaro = t.expressionStatement(expression)
    return ExpressionStatementTaro
}

function genRenderMethod(state, argument) {

+ 5 other calls in file

main.js

GitHub: wsrh8888/vue-cli-plugin-xuwu

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    if (element.declarations[0].id.name === 'app') {
      resultIndex = index + 1
    }
  }
})
let createPiniaAst = types.expressionStatement(
  types.callExpression(
    types.memberExpression(
      types.identifier('app'),
      types.identifier('use')

+ 7 other calls in file

Other functions in @babel/types

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