javascript - Typescript map not awaiting result

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65891232/typescript-map-not-awaiting-result

Answer 1

Array prototype methods don't await even if they are async. The code fires in a synchronous manner still. If you need these to await you can do

const subcategories = articleDto.subcategoriesIds.split(',').map(x => +x)
const subcategoriesList = []

for (const subCategoryId of subcategories) {
  console.log('start:' + subcategoryId)
  const category = await this.subcategoriesService.getSubcategoryById(subcategoryId);
  console.log('mid:' + subcategoryId)
  await subcategoriesList.push(category);
  console.log('end:' + subcategoryId);
}

console.log('### ' + subcategories);
console.log('### ' + subcategoriesList);