javascript - 如何修复语法错误: await is only valid in async function in Google cloud vision

Question

我想使用 Google 云视觉 API。我复制了代码，但收到以下错误: SyntaxError:await 仅在异步函数中有效。

const vision = require('@google-cloud/vision');

// Creates a client
const client = new vision.ImageAnnotatorClient();

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
const fileName = '/Tickets/leclerc.jpg';

// Performs text detection on the local file
const [result] = await client.textDetection(fileName);
const detections = result.textAnnotations;
console.log('Text:');
detections.forEach(text => console.log(text));    

有什么解决办法吗？

非常感谢

Answer 1

await 方法需要包含在异步函数中，这很容易修复。

const detectLocalFile = async function() {
  const [result] = await client.textDetection(fileName);
  {...}
}