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How to use the assignmentExpression function from babel-types

Find comprehensive JavaScript babel-types.assignmentExpression code examples handpicked from public code repositorys.

babel-types.assignmentExpression is a method used in the Babel library to create an AST (Abstract Syntax Tree) node representing an assignment expression in JavaScript.

bind-this.js

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    current = current.parentPath
  }

  rightExpression = t.arrayExpression([rightExpression, t.stringLiteral(firstKey)])
  // 构造赋值语句并挂到要改的path下，等对memberExpression访问exit时处理
  last.assignment = t.assignmentExpression('=', t.memberExpression(t.identifier('renderData'), t.stringLiteral(keyPath.toString()), true), rightExpression)
}

// flag get
last = path

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+ 9 other calls in file

bind-this.js

GitHub: bluepeople1/mpx

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      }
      last = current
      current = current.parentPath
    }
    // 构造赋值语句并挂到要改的path下，等对memberExpression访问exit时处理
    last.assignment = t.assignmentExpression('=', t.memberExpression(t.identifier('__renderData'), t.stringLiteral(keyPath), true), rightExpression)
  }
}
// flag get
last = path

349

+ 5 other calls in file

How does babel-types.assignmentExpression work?

In JavaScript, an assignment expression is used to assign a value to a variable. For example, x = 5 is an assignment expression that assigns the value 5 to the variable x. babel-types.assignmentExpression is a method used in the Babel library to create an AST node representing an assignment expression. The AST is a structured representation of the code that can be used for various purposes, such as code analysis, transformation, and generation. The babel-types.assignmentExpression method takes three arguments: left: The left-hand side of the assignment expression, represented as an AST node. This can be a babel-types.identifier node representing a variable name, or another AST node representing a more complex expression. operator: The assignment operator, represented as a string. This can be one of the following: =, +=, -=, *=, /=, %=, <<=, >>=, >>>=, &=, ^=, |=. right: The right-hand side of the assignment expression, represented as an AST node. This can be a babel-types.identifier node representing a variable name, a babel-types.literal node representing a literal value, or another AST node representing a more complex expression. The babel-types.assignmentExpression method returns an AST node representing the assignment expression, with the type property set to "AssignmentExpression". This node has three properties: left: The left-hand side of the assignment expression, represented as an AST node. operator: The assignment operator, represented as a string. right: The right-hand side of the assignment expression, represented as an AST node. By using babel-types.assignmentExpression to create AST nodes representing assignment expressions, Babel is able to parse, analyze, transform, and generate JavaScript code programmatically.

generate_implemented_properties.js

GitHub: GabrielBibiano/CSSStyleDeclaration

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  );
});

statements.push(
  t.expressionStatement(
    t.assignmentExpression(
      '=',
      t.memberExpression(t.identifier('module'), t.identifier('exports')),
      t.identifier('implementedProperties')
    )

3.class.js

GitHub: zhilinYu/zhufeng-public

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    }else{
        // 替他情况就是原型上的方法
        let protoObj = t.memberExpression(className,t.identifier('prototype'));
        let left = t.memberExpression(protoObj,t.identifier(item.key.name));
        let right = t.functionExpression(null,[],body,false,false);
        let assign = t.assignmentExpression('=',left,right);
        // 多个原型上的方法
        es5Func.push(assign);
    }
});

+ 3 other calls in file

Ai Example

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

const left = t.identifier("x"); // creates an AST node representing the variable "x"
const operator = "="; // the assignment operator
const right = t.numericLiteral(5); // creates an AST node representing the number 5

const assignmentExpr = t.assignmentExpression(operator, left, right); // creates the AST node

console.log(assignmentExpr);
// Output:
// {
//   type: 'AssignmentExpression',
//   operator: '=',
//   left: { type: 'Identifier', name: 'x' },
//   right: { type: 'NumericLiteral', value: 5 }
// }

In this example, we first import the @babel/types module and use it to create three AST nodes: left: An Identifier node representing the variable x. operator: A string representing the assignment operator "=". right: A NumericLiteral node representing the number 5. Then we call the t.assignmentExpression method with these nodes as arguments to create the final AST node representing the assignment expression. The resulting AST node has type set to "AssignmentExpression", left set to the Identifier node representing x, operator set to "=", and right set to the NumericLiteral node representing 5.

pug-code-gen-module.js

GitHub: pugjs/then-pug

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wrapCallExpression: function(node) {
  return node;
},
ast_buffer: function(ast) {
  return [t.expressionStatement(
          t.assignmentExpression('=',
            t.identifier('pug_html'),
            t.binaryExpression('+', t.identifier('pug_html'), ast)
          ))];
},

+ 45 other calls in file

26.webpack-4-AST.md?plain=1

GitHub: sillyhong/whongjiagou-learn

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        constructorFunction = t.functionDeclaration(id,method.params,method.body,false,false);
        functions.push(constructorFunction);
    } else {
        let memberObj=t.memberExpression(t.memberExpression(id,t.identifier('prototype')),method.key);
        let memberFunction = t.functionExpression(id,method.params,method.body,false,false);
        let assignment = t.assignmentExpression('=',memberObj,memberFunction);
        functions.push(assignment);
    }
});
if (functions.length ==1) {

+ 17 other calls in file

%E7%BC%96%E5%86%99%E8%BF%87%E7%A8%8B%E7%AC%94%E8%AE%B0.md?plain=1

GitHub: Zenquan/babel-plugin-import

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    }else {
        let protoObj = t.memberExpression(className, t.identifier('prototype'));
        let left = t.memberExpression(protoObj, t.identifier(item.key.name));
        let right = t.functionExpression(null, [], body, false, false);

        let assign = t.assignmentExpression('=', left, right);
        es5func.push(assign);
    }
})
if(es5func.length==0)

+ 21 other calls in file

index.js

GitHub: abeet/babel-plugin-for-zving-project

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//    types.cloneDeep(declaration)
//  )
//)
// ^1.1.0 20190123
let exportDeclaration = types.exportDefaultDeclaration(
  types.assignmentExpression(
    '=',
    buildMemberExprssion(moduleRefer),
    types.callExpression(
      types.memberExpression(types.identifier('Object'), types.identifier('assignIf'), false),

+ 3 other calls in file

4.class.js

GitHub: SHIJIECHN/webpack-demo

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  } else {// 其他的函数属于普通函数，需要放在原型上的
    // method.key=getName
    // Person.prototype.getName
    let left = types.memberExpression(types.memberExpression(id, types.identifier('prototype')), method.key);
    let right = types.functionExpression(null, method.params, method.body, method.generator, method.async);
    let assignmentExpression = types.assignmentExpression('=', left, right);
    body.push(assignmentExpression)
  }
})
// nodePath.replaceWith();// 替换成单节点

class.js

GitHub: yudc13/interview

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		let left = types.memberExpression(
			types.memberExpression(id, types.identifier('property')),
			method.key
		)
		let right = types.functionExpression(null, method.params, method.body, false, false)
		let assignmentExpression = types.assignmentExpression('=', left, right)
		body.push(assignmentExpression)
	}
})
   path.replaceWithMultiple(body)

commonjs.js

GitHub: tadasant/parcel

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if (!exports) return;

// redeclared in this scope
if (this.scope.getBinding(name) !== path.scope.getBinding(name)) return;

const node = t.assignmentExpression(
  path.node.operator[0] + '=',
  arg.node,
  t.numericLiteral(1)
);

+ 19 other calls in file

Other functions in babel-types

Sorted by popularity

babel-types.identifier is the most popular function in babel-types (4076 examples)

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