How to use the blockStatement function from @babel/types
Find comprehensive JavaScript @babel/types.blockStatement code examples handpicked from public code repositorys.
@babel/types.blockStatement is a function in the Babel library that generates an AST node representing a block of code in JavaScript.
GitHub: qooxdoo/qooxdoo
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path.node.body.forEach(node => inject.push(node)); 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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// let a = t.Identifier('a') // let decryptFunc = t.functionDeclaration( // t.identifier(decrypt.name), // [a], // t.blockStatement([t.returnStatement( // t.callExpression( // t.identifier(decrypt), // [a]) // )]));
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How does @babel/types.blockStatement work?
@babel/types.blockStatement is a function that creates an AST node representing a block statement in JavaScript. It takes an array of body nodes as its argument, where each body node represents a statement inside the block. The @babel/types module is a collection of functions that generate Abstract Syntax Tree (AST) nodes for various constructs in the JavaScript programming language. An AST is a tree representation of the source code that allows you to perform programmatic operations on the code. A block statement in JavaScript is a set of statements enclosed in curly braces ({}) that are treated as a single unit of code. It is often used to group multiple statements together, for example, inside an if statement or a function. The @babel/types.blockStatement function generates an AST node for such a block of code. The generated AST node has the following structure: css Copy code {{{{{{{ class="!whitespace-pre hljs language-css">{ type: 'BlockStatement', body: [ /* an array of body nodes representing the statements inside the block */ ], directives: [] /* an array of directives, if any */ } Here, type indicates the type of the AST node (BlockStatement), body is an array of AST nodes representing the statements inside the block, and directives is an array of directives (e.g., 'use strict') that are used to enable certain features or enforce certain behavior. Overall, the @babel/types.blockStatement function is a building block that can be used to generate AST nodes representing blocks of code in JavaScript, which can then be manipulated or transformed using other functions in the Babel library.
GitHub: raxjs/miniapp
![raxjs profile picture](/raxjs.png?size=40)
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const forNode = handleParentListReturn(node, iterValue, parentList, dynamicValue, code); if (!t.isBlockStatement(body)) { // create a block return for inline return body = t.blockStatement([t.returnStatement(body)]); mapCallbackFnBodyPath.replaceWith(body); } // __jsxlist
+ 13 other calls in file
GitHub: egoist/styled-vue
![egoist profile picture](/egoist.png?size=40)
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null, [ t.identifier('vm'), !isGlobal && t.identifier('existing') // Global vars are handled differently ].filter(Boolean), t.blockStatement([ ...varDeclarations, t.returnStatement( isGlobal ? t.objectExpression(vars)
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Ai Example
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const t = require("@babel/types"); const statements = [ t.expressionStatement( t.assignmentExpression( "=", t.identifier("x"), t.binaryExpression("+", t.identifier("y"), t.identifier("z")) ) ), t.returnStatement(t.identifier("x")), ]; const block = t.blockStatement(statements); console.log(block);
In this example, @babel/types.blockStatement is used to create a block statement node that contains two expression statements and a return statement. The resulting AST node can then be used by a code generator to output the corresponding JavaScript code.
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// 防止命名重复的问题,暂时用var _self.componentBody.unshift( t.variableDeclaration('var', [t.variableDeclarator(decl, call)]) ) }) const blockStatements = t.blockStatement(_self.componentBody) path.replaceWith( t.functionDeclaration( path.node.id, [t.identifier('props')],
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statements.unshift(printHash()); const statement = babelTypes.tryStatement( babelTypes.blockStatement(statements), babelTypes.catchClause( babelTypes.identifier('e'), babelTypes.blockStatement([]))); this.annotate(statement, 'Print variables and exceptions from section'); return statement; }
+ 3 other calls in file
GitHub: 2833844911/cy_jsvmp
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if (path.node.body.type == "BlockStatement"){ body = body.concat(path.node.body.body) }else{ body.push(path.node.body) } bodyOfmyfor = tee.blockStatement( body ) var forme = tee.forStatement(initOfmyfor, testOfmyfor, upOfmyfor, bodyOfmyfor)
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GitHub: nwjs/v8
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} function wrapTryCatchInFunction(node) { const ret = wrapTryCatch(babelTypes.returnStatement(node)); const anonymousFun = babelTypes.functionExpression( null, [], babelTypes.blockStatement([ret])); return babelTypes.callExpression(anonymousFun, []); } // Wrap particular member expressions after `new` that are known to appear
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buildReference(type/*: any*/)/*: any*/ { return bt.genericTypeAnnotation(bt.identifier(type)) } buildModule(types/*: mixed[]*/)/*: mixed[]*/ { return [bt.declareModule(bt.stringLiteral('telegram-typings'), bt.blockStatement(types))] } buildProgram(body/*: any*/) { return generate(bt.program(body, [], 'module'))
+ 11 other calls in file
GitHub: omarjuice/algo-viz
![omarjuice profile picture](/omarjuice.png?size=40)
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} if (!t.isReturnStatement(block.body[block.body.length - 1])) { block.body.push(t.returnStatement(t.identifier('undefined'))) } } else { path.node.body = t.blockStatement([ t.expressionStatement( newNode), ...params.filter(p => p), t.returnStatement(path.node.body)
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GitHub: baidu/wx2
![baidu profile picture](/baidu.png?size=40)
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temp[item] && temp[item].forEach((cont, index) => { arg.properties.forEach(obj => { if (get(obj, 'key.name') !== get(cont, 'key.name')) { return; } const blockBody = t.blockStatement(get(cont, 'body.body')); get(obj, 'body.body').push(blockBody); temp[item].splice(index, 1); }); });
+ 3 other calls in file
GitHub: ringcrl/cs-notes
![ringcrl profile picture](/ringcrl.png?size=40)
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// 拿到函数的参数 const { params } = node; let { body } = node; // 判断是不是 blockStatement,不是的话让他变成 blockStatement if (!t.isBlockStatement(body)) { body = t.blockStatement([body]); } const functionExpression = t.functionExpression(null, params, body); // 替换 原来的函数 path.replaceWith(functionExpression);
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traverse(ast, { ArrowFunctionExpression: (path, state) => { let node = path.node; let id = path.parent.id; let params = node.params; let body= types.blockStatement([ types.returnStatement(node.body) ]); let functionExpression = types.functionExpression(id,params,body,false,false); path.replaceWith(functionExpression);
+ 13 other calls in file
GitHub: alijk-fe/motor-rax
![alijk-fe profile picture](/alijk-fe.png?size=40)
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// Transform x-for forNode to map function const properties = [ t.objectProperty(params[0], params[0]), t.objectProperty(params[1], params[1]) ]; const loopFnBody = t.blockStatement([ t.returnStatement( t.objectExpression(properties) ) ]);
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GitHub: fecym/ast-share
![fecym profile picture](/fecym.png?size=40)
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} else { // 如果只是表达式的话,path.parentPath.node 就是 blockStatement 参数 replacePath = path.parentPath; } // console.log("AwaitExpression -> replacePath", replacePath) const tryBlock = t.blockStatement([replacePath.node]); // 生成 catch --> new Error(e) const paramsE = t.identifier('e'); const throwStatement = t.throwStatement(t.newExpression(t.identifier('Error'), [paramsE])); const catchClause = t.catchClause(paramsE, t.blockStatement([throwStatement]));
GitHub: suchipi/tofu
![suchipi profile picture](/suchipi.png?size=40)
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canWrapStatement: boolean; hidden?: boolean; }[] = [ { name: 'if', create: (child = t.blockStatement([t.emptyStatement()])) => t.ifStatement(t.identifier('someCondition'), child), getInitialCursor: (ast, path) => selectName(getNodeFromPath(ast, [...path, 'test'])), canWrapStatement: true
+ 23 other calls in file
GitHub: groupon/swagql
![groupon profile picture](/groupon.png?size=40)
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t.objectProperty(t.identifier('name'), t.stringLiteral(graphqlName)), t.objectMethod( 'method', t.identifier('serialize'), [t.identifier('value')], t.blockStatement([t.returnStatement(t.identifier('value'))]) ), ]), ]) ),
GitHub: dchan3/enigma-cms
![dchan3 profile picture](/dchan3.png?size=40)
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} else if (path.node.arguments[0].params.length === 2) { path.parentPath.replaceWith(t.forInStatement( t.variableDeclaration('let', [t.variableDeclarator(t.identifier(path.node.arguments[0].params[1].name))]), path.node.callee.object, t.blockStatement([t.ifStatement(t.binaryExpression('!==', t.identifier(path.node.arguments[0].params[1].name), t.stringLiteral('length')), t.blockStatement([t.variableDeclaration('let', [t.variableDeclarator(path.node.arguments[0].params[0], t.memberExpression(t.identifier(path.node.callee.object.name), t.identifier(path.node.arguments[0].params[1].name), true))] ), ...path.node.arguments[0].body.body])
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// 拿到函数的参数 const params = node.params let body = node.body // 判断是不是 blockStatement,不是的话让他变成 blockStatement if (!t.isBlockStatement(body)) { body = t.blockStatement([body]) } const functionExpression = t.functionExpression(null, params, body) // 替换原来的函数 path.replaceWith(functionExpression)
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state.vForVars[index.trim()] = true; const member = handleExpression(state, right.trim()); const body = !showIfExp ? dom : t.blockStatement([ t.ifStatement( handleExpression(state, showIfExp), t.blockStatement([t.returnStatement(dom)]) )
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@babel/types.identifier is the most popular function in @babel/types (20936 examples)