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Notion Page Words Counter

Count current page words.

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 or Violentmonkey 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         Notion Page Words Counter
// @name:zh-CN   Notion 页面字数统计
// @namespace    https://notion.cx/
// @version      0.1.0
// @description  Count current page words.
// @description:zh-cn 统计当前页面的字数。
// @author       Ruter Lü
// @match        https://www.notion.so/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    /* Helper function to wait for the element ready */
    const waitFor = (...selectors) => new Promise(resolve => {
        const delay = 500;
        const f = () => {
            const elements = selectors.map(selector => document.querySelector(selector));
            if (elements.every(element => element != null)) {
                resolve(elements);
            } else {
                setTimeout(f, delay);
            }
        }
        f();
    });
    /* Helper function to wait for the element ready */

    /* Word Count Function */
    let pattern = /[a-zA-Z0-9_\u0392-\u03c9\u00c0-\u00ff\u0600-\u06ff\u0400-\u04ff]+|[\u4e00-\u9fff\u3400-\u4dbf\uf900-\ufaff\u3040-\u309f\uac00-\ud7af]+/g;

    function wordCount(str) {
        let m = str.match(pattern);
        let count = 0;
        if (!m) {
            return 0;
        }
        for (let i = 0; i < m.length; i++) {
            if (m[i].charCodeAt(0) >= 0x4e00) {
                count += m[i].length;
            } else {
                count += 1;
            }
        }
        return count;
    };
    /* Word Count Function */

    /* Word Count Element */
    const countCss = '-webkit-user-select: none; cursor: auto; position: absolute; display: flex; align-items: center; justify-content: center; bottom: 0px; right: 32px; height: 32px; font-size: 12px; z-index: 100; opacity: 1; background-position: initial initial; background-repeat: initial initial;';
    const countEl = document.createElement('div');
    countEl.setAttribute('class', 'notion-word-count');
    countEl.style.cssText = countCss;
    countEl.innerHTML = 'Word count: <span class="notion-word-counter">0</span>';
    /* Word Count Element */

    /* Word Count Observer */
    let isCounterSet = false;
    let oldHref = '';
    let callback = function(mutations) {
        if (oldHref != document.location.href) {
            oldHref = document.location.href;
            const pageObserver = new MutationObserver(() => {
                const firstContent = document.querySelector('div.notion-page-content');
                // Whether if the word count element was set
                if (firstContent) {
                    if (!isCounterSet) {
                        isCounterSet = true;
                        const helpBtn = document.querySelector('div.notion-help-button');
                        helpBtn.after(countEl);
                    }
                    countEl.children[0].innerText = wordCount(firstContent.innerText);
                }
            });
            waitFor('div.notion-page-content').then(([el]) => {
                let pageContent = document.querySelector('div.notion-page-content');
                pageObserver.observe(pageContent, { childList: true, subtree: true, characterData: true });
            });
        }
    };
    const observer = new MutationObserver(callback);
    // Start observe
    waitFor('div.notion-page-content').then(([el]) => {
        // let pageContent = document.querySelector('div.notion-page-content');
        let notionApp = document.getElementById('notion-app');
        const config = { childList: true, subtree: true };
        observer.observe(notionApp, config);
    });
    /* Word Count Observer */
})();