如何使用 ts-morph 獲取 object 文字屬性

Question

我正在使用 ts-morph 解析這樣的文件

const a = {property1: 20, property2: 30}

我似乎無法弄清楚如何獲得此處提到的 ObjectLiteralExpression

https://ts-morph.com/details/object-literal-expressions

const properties = objectLiteralExpression.getProperties();
// or
const property = objectLiteralExpression.getProperty("propertyAssignment");
// or
const spreadAssignment = objectLiteralExpression.getProperty(
    p => p.getText() === "...spreadAssignment",
);
// or
const method = objectLiteralExpression.getPropertyOrThrow("method");

這是我目前使用的。 我正在獲取返回表達式的初始化程序，但我找不到獲取 object 文字表達式的方法

    const project = new Project()
    project.addSourceFileAtPath(filePath)
    const sourceFile = project.getSourceFileOrThrow(filePath)
    const dec = sourceFile.getVariableDeclarationOrThrow(
      'a'
    )
    const objectLiteralExpression = dec.getInitializer() as ObjectLiteralExpression //
    console.log(objectLiteralExpression.getProperties())//This returns blank

Answer 1

顯然，這是正確的做法。 我把變量命名錯了，它沒有拋出

const project = new Project()
    project.addSourceFileAtPath(filePath)
    const sourceFile = project.getSourceFileOrThrow(filePath)
    const dec = sourceFile.getVariableDeclarationOrThrow(
      'a'
    )
    const objectLiteralExpression = dec.getInitializer() as ObjectLiteralExpression //
    console.log(objectLiteralExpression.getProperties())//This returns blank

Answer 2

我通過將ObjectLiteralExpression提供給初始化程序來使其工作，如下所示：

const project = new Project()
project.addSourceFileAtPath(filePath)
const sourceFile = project.getSourceFileOrThrow(filePath)
const dec = sourceFile.getVariableDeclarationOrThrow(
    'a'
)
const dev = template.getVariableDeclarationOrThrow('a')
const objectLiteralExpression = dec.getInitializerIfKindOrThrow(ObjectLiteralExpression)
console.log(objectLiteralExpression.getProperties()) // output here

Answer 3

它像這樣對我有用：

getInitializerIfKindOrThrow() accepts emum SyntaxKind

const project = new Project();
project.addSourceFileAtPath(filePath);
const sourceFile = project.getSourceFileOrThrow(filePath);
const dec = sourceFile.getVariableDeclarationOrThrow(
   'a'
);

const objectLiteralExpression = dec.getInitializerIfKindOrThrow(ts.SyntaxKind.ObjectLiteralExpression);
console.log(objectLiteralExpression.getProperties()); // output here