inject_stylesheet.js

const url = window.location.href;
if (
    url.includes('acmicpc.net')
) inject('override-commons.css');
if (
    url.includes('acmicpc.net/problemset') ||
    url.includes('acmicpc.net/problem/tag') ||
    url.includes('acmicpc.net/newproblems')
) inject('override-problems1.css');
if (
    url.includes('acmicpc.net/step') ||
    url.includes('acmicpc.net/problem/ranking') ||
    url.includes('acmicpc.net/category/detail')
) inject('override-problems2.css');
if (
    url.includes('acmicpc.net/ranklist') ||
    url.includes('acmicpc.net/school/ranklist') ||
    url.includes('acmicpc.net/group/ranklist') ||
    url.includes('acmicpc.net/group/workbook/view')
) inject('override-problems3.css');
if (
    url.includes('acmicpc.net/category') &&
    !url.includes('acmicpc.net/category/detail')
) inject('override-problems4.css');
if (
    url.includes('acmicpc.net/user')
) inject('override-user1.css');
if (
    url.includes('acmicpc.net/user') ||
    url.includes('acmicpc.net/vs')
) inject('override-user2.css');
if (
    url.includes('acmicpc.net/status')
) inject('override-status.css');

function inject(localCss) {
    console.log(chrome.extension.getURL(`css/${localCss}`));
    var injection = document.createElement('link');
    injection.setAttribute('rel', 'stylesheet');
    injection.setAttribute('type', 'text/css');
    injection.setAttribute('href', chrome.extension.getURL(`css/${localCss}`));
    document.getElementsByTagName('head')[0].appendChild(injection);
}