Screen Display Log

ipadやiphone用に、画面にログを出力する。console.log() の代わりに screenLog() で利用する。

נכון ליום 10-05-2026. ראה הגרסה האחרונה.

אין להתקין סקריפט זה ישירות. זוהי ספריה עבור סקריפטים אחרים // @require https://update.greasyfork.org/scripts/577436/1820905/Screen%20Display%20Log.js

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Screen Display Log
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  ipadやiphone用に、画面にログを出力する。console.log() の代わりに screenLog() で利用する。
// @grant        none
// ==/UserScript==

/**
 * 画面端にデバッグ用UIを表示するクラス
 */
class ScreenLogger {
    constructor() {
        this.id = 'tm-debug-console';
        this.container = null;
        this.logArea = null;
        this._setup();
    }

    /**
     * 初期セットアップ
     */
    _setup() {
        if (document.getElementById(this.id)) return;
        this._injectStyles();
        this._createUI();
    }

    /**
     * CSSを<style>タグとして注入(インラインスタイルの撤廃)
     */
    _injectStyles() {
        const style = document.createElement('style');
        style.textContent = `
            #${this.id} { position: fixed; bottom: 10px; right: 10px; width: 280px; max-height: 250px; background-color: rgba(0, 0, 0, 0.85); color: #00ff00; font-size: 11px; font-family: monospace; padding: 5px; border-radius: 5px; overflow-y: auto; z-index: 999999; pointer-events: auto; border: 1px solid #444; box-shadow: 0 0 10px rgba(0,0,0,0.5); }
            #${this.id} .tm-header { border-bottom: 1px solid #444; margin-bottom: 5px; padding-bottom: 3px; display: flex; justify-content: space-between; align-items: center; }
            #${this.id} .tm-header b { color: #fff; }
            #${this.id} button { font-size: 9px; cursor: pointer; margin-left: 4px; }
            #${this.id} .tm-log-area { display: block; }
            #${this.id} .tm-line { border-bottom: 1px solid #222; padding: 2px 0; white-space: pre-wrap; word-break: break-all; }
            #${this.id}.minimized { height: 25px; overflow: hidden; }
            #${this.id}.minimized .tm-log-area { display: none; }
        `;
        document.head.appendChild(style);
    }

    /**
     * UI要素の構築
     */
    _createUI() {
        this.container = document.createElement('div');
        this.container.id = this.id;

        const header = document.createElement('div');
        header.className = 'tm-header';
        header.innerHTML = `
            <span><b>[DEBUG]</b></span>
            <div>
                <button id="tm-clear-log">Clear</button>
                <button id="tm-toggle-log">Min</button>
            </div>
        `;

        this.logArea = document.createElement('div');
        this.logArea.className = 'tm-log-area';

        this.container.appendChild(header);
        this.container.appendChild(this.logArea);
        document.body.appendChild(this.container);

        // イベントリスナーの登録
        this.container.querySelector('#tm-clear-log').onclick = () => this.clear();
        this.container.querySelector('#tm-toggle-log').onclick = (e) => this._toggle(e.target);
    }

    /**
     * 表示・非表示の切り替え
     */
    _toggle(btn) {
        const isMinimized = this.container.classList.toggle('minimized');
        btn.innerText = isMinimized ? 'Max' : 'Min';
    }

    /**
     * ログの消去
     */
    clear() {
        if (this.logArea) this.logArea.innerHTML = '';
    }

    /**
     * 引数を文字列に整形(HTML要素、オブジェクト対応)
     */
    _format(arg) {
        if (arg === null) return 'null';
        if (arg === undefined) return 'undefined';

        if (arg instanceof HTMLElement) {
            const id = arg.id ? `#${arg.id}` : '';
            const classes = arg.className ? `.${Array.from(arg.classList).join('.')}` : '';
            return `<${arg.tagName.toLowerCase()}${id}${classes}>`;
        }

        if (typeof arg === 'object') {
            try {
                return JSON.stringify(arg);
            } catch (e) {
                return String(arg);
            }
        }

        return String(arg);
    }

    /**
     * 画面にログを出力
     */
    log(...args) {
        const msg = args.map(arg => this._format(arg)).join(' ');
        const line = document.createElement('div');
        line.className = 'tm-line';
        line.innerText = `> ${msg}`;

        this.logArea.appendChild(line);
        this.container.scrollTop = this.container.scrollHeight;
    }
}

/**
 * 外部から呼び出すためのエントリーポイント
 */
function initOnScreenConsole() {
    const logger = new ScreenLogger();
    // 既存の「関数として呼び出す」挙動を維持するため、メソッドをバインドして返す
    return logger.log.bind(logger);
}

// 利用開始
const screenLog = initOnScreenConsole();