[英]How can I get the "bio" value of a "User" object in JavaScript?
[英]How can I get a value from user and use it in Javascript
我正在嘗試制作問答游戲,並希望允許用戶選擇游戲難度。 我有一個JSON列表,其中包含問題。
var easy = '[{"eser":"Question1","yazar":"Answer1"},{"eser":"Question2","yazar":"Answer2"}]';
var hard = '[{"eser":"Question3","yazar":"Answer3"},{"eser":"Question4","yazar":"Answer4"}]';
我像下面這樣解析
difficulty = JSON.parse(easy);
var count = Object.keys(difficulty).length;
游戲打開時,它將顯示一個彈出窗口,要求用戶選擇難度。 基本上,當用戶單擊“困難”時,我想捕獲它並更改上面的代碼,即difficulty = JSON.parse(hard);
HTML代碼在這里
<div class="button_easy">Easy</div>
<div class="button_hard">Hard</div>
謝謝
不要使用單獨的變量,而應使用其鍵與它們選擇的元素中的某物相對應的對象。
const questions = {
easy: [{"eser":"Question1","yazar":"Answer1"},{"eser":"Question2","yazar":"Answer2"}],
hard: [{"eser":"Question3","yazar":"Answer3"},{"eser":"Question4","yazar":"Answer4"}]
};
HTML可以像:
<div class="difficulty" data-level="easy">Easy</div>
<div class="difficulty" data-level="hard">Hard</div>
JS將是:
let chosen_questions;
document.querySelector(".difficulty").forEach(b => b.addEventListener("click", function() {
let level = this.dataset.level;
chosen_questions = questions[level];
}));
您可以使用eval
函數來實現(如果沒有這樣的變量以user_choice
表示的字符串,則這里將省略錯誤處理):
var difficulty = JSON.parse(eval(user_choice))
但是我認為最好將這兩個列表放在這樣的字典中:
var difficulty_dic = {
'easy': easy,
'hard': hard
}
然后您可以執行以下操作:
var difficulty = JSON.parse(difficulty_dic[user_choice])
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