history.js

"use strict";
let history;
try {
    history = JSON.parse(localStorage.history);
} catch (e) {
    console.log(e);
    history = {};
}

function show_history() {
    const history_id = settings.history_id.value;
    document.getElementById("exam-content").innerHTML = history[history_id];
    document.getElementById("exam-result").innerHTML
        = `正确率：${document.querySelectorAll(".question.correct").length}/${document.querySelectorAll(".question").length}`;
}

function toggle_is_incorrect_only() {
    const is_incorrect_only = settings.is_incorrect_only.value === "yes";
    if (is_incorrect_only)
        document.getElementById("is_incorrect_only").innerHTML = `
            .question.correct, .question.correct + div {
                display: none;
            }`;
    else
        document.getElementById("is_incorrect_only").innerHTML = "";
}

function clear_history() {
    history = {};
    delete localStorage.history;
    document.getElementById("exam-content").innerHTML = "";
    document.getElementById("exam-result").innerHTML = "";
    settings.history_id.innerHTML = "<option disabled selected>请选择记录</option>";
    alert("答题记录已清空");
}