JavaScript 从一个值执行 Object.entries()

Question

我需要创建一个从 json 对象创建组合框的函数。我得不到

"use strict"

let vars = {
  kagit: {
    "ABR": 50,
    "Krome 230 gr": 230,
    "Krome 300 gr": 300,
    "Krome 350 gr": 350,
    "Fantezi": 6,
    "Kraft": 5,
    "1. Hamur": 4
  },
 ebat: {
  "50x70 cm": 5,
  "90x126 cm": 76
 }
}

正如您从函数中看到的那样，我使用了 object.entries() 但是当我尝试执行该函数时，我无法放置从函数执行返回的参数。

function comboBox(comboValue) {

  let getValue = comboValue;

  let comboOption = document.querySelector('.' + getValue);

  let defaultOption = document.createElement('option');
  defaultOption.text = 'Lütfen Seçiniz';

  comboOption.add(defaultOption);
  comboOption.selectedIndex = 0;

  let objEnt = "vars." + getValue;

  let option;
    for (const [key, value] of Object.entries(objEnt)) {
      option = document.createElement('option');
      option.text = key;
      option.value = value;
      comboOption.add(option);
    }
    return;
}
comboBox("kagit");

Answer 1

不要将字符串传递给 Object.Entries。而是传递对象:

let vars = {
  kagit: { "ABR": 50, "Krome 230 gr": 230, "Krome 300 gr": 300, "Krome 350 gr": 350, "Fantezi": 6, "Kraft": 5, "1. Hamur": 4 },
  ebat: { "50x70 cm": 5, "90x126 cm": 76 }
}

function comboBox(comboValue) {
  // Get the chosen value from the `vars` global;
  let objEnt = vars[comboValue];

  // Now get this value's entries
  let entries = Object.entries(objEnt);

  console.log(entries)
}

comboBox("kagit");