Memblokir Permintaan Jaringan
Pelajari cara menentukan aturan untuk memblokir permintaan jaringan yang tidak diinginkan, seperti iklan atau skrip pelacakan, menggunakan `declarativeNetRequest`.
Memblokir Permintaan Jaringan adalah pelajaran Browser Extensions Development (Chrome & Edge) gratis di CoddyKit. Ini adalah pelajaran 1 dari 4. Kamu bisa membaca pelajaran lengkapnya di bawah secara gratis — lalu praktikkan langsung di browser dengan editor kode bawaan dan tutor AI 24/7. Ini adalah bagian dari jalur belajar Browser Extensions Development (Chrome & Edge), dan progresmu tersinkronisasi di web dan aplikasi CoddyKit. Kursus Browser Extensions Development (Chrome & Edge) mencakup 4 pelajaran total.
Bagian dari pelajaran ini belum diterjemahkan dan ditampilkan dalam bahasa Inggris.
Intro to Blocking Requests
Welcome to modifying web requests! This lesson introduces declarativeNetRequest, a powerful API for controlling network requests in your browser extension.
You'll learn how to define rules to block unwanted content like ads, tracking scripts, or specific resources, making web browsing cleaner and faster.
Why Block Network Requests?
Blocking network requests isn't just about privacy; it's also about performance and user experience.
- Remove Ads: Block requests to ad servers.
- Stop Trackers: Prevent tracking scripts from loading.
- Improve Performance: Less data downloaded means faster page loads.
- Enhance Security: Block malicious domains or content.
Declarative vs. Imperative
Traditional ad blockers often use imperative logic: JavaScript code that runs on every page to detect and block elements.
declarativeNetRequest is declarative. You define rules, and the browser handles the blocking efficiently, often without waking up your extension's JavaScript. This is faster and more resource-friendly!
Manifest Permission for Blocking
To use declarativeNetRequest, your extension needs to declare the permission in its manifest.json file.
This tells the browser your extension intends to modify network requests.
{
"manifest_version": 3,
"name": "My Blocker",
"version": "1.0",
"permissions": [
"declarativeNetRequest"
]
}Structure of a Blocking Rule
A blocking rule is an object with an id, an action, and a condition. The browser checks these conditions against every network request.
id: A unique number for the rule.action: What to do (e.g., 'block', 'redirect').condition: When to apply the action (e.g., 'urlFilter', 'resourceTypes').
The 'Block' Action Type
For this lesson, we'll focus on the "block" action. When a request matches a rule with this action, the browser simply prevents that request from completing.
The action part of your rule will look like this:
{
"action": {
"type": "block"
}
}Conditions: `urlFilter`
The urlFilter property in a rule's condition allows you to specify a pattern for URLs to match. It's like a mini-regex.
"*://*.example.com/*"matches any subdomain of example.com."*://ads.google.com/*"specifically targets Google ads."*track*"matches URLs containing 'track'.
Conditions: `resourceTypes`
You can also specify which types of resources to block using resourceTypes. This helps you target specific content like images, scripts, or fonts.
Common types include "script", "image", "stylesheet", "media", and "font".
Adding Dynamic Blocking Rules
Rules can be added dynamically by your extension using chrome.declarativeNetRequest.updateDynamicRules(). This is often done in your background script.
This example adds a rule to block requests containing "adserver" in their URL, specifically for scripts and images.
console.log("Background script running.");
const BLOCK_RULE_ID = 1;
chrome.runtime.onInstalled.addListener(() => {
chrome.declarativeNetRequest.updateDynamicRules({
removeRuleIds: [BLOCK_RULE_ID], // Remove if already exists
addRules: [{
id: BLOCK_RULE_ID,
priority: 1,
action: { type: "block" },
condition: {
urlFilter: "*://*adserver*/*",
resourceTypes: ["script", "image"]
}
}]
}, () => {
if (chrome.runtime.lastError) {
console.error("Error updating rules: ", chrome.runtime.lastError);
} else {
console.log("Blocking rule added!");
}
});
});
// To test, visit a page with 'adserver' in script/image URLs.Quick Check: Rule Matching
Consider the following blocking rule:
{
"id": 2,
"priority": 1,
"action": { "type": "block" },
"condition": {
"urlFilter": "*://*.tracker.com/*",
"resourceTypes": ["script", "image"]
}
}Which of these requests would be blocked?
Recap: Blocking Requests
Great job! You've learned the basics of blocking network requests with declarativeNetRequest.
- It's a powerful, performant, and privacy-friendly API.
- Rules consist of an
id,action(e.g.,"block"), andcondition. urlFilterandresourceTypesare key for defining conditions.- Dynamic rules can be added and managed using
updateDynamicRules().
Next, you'll explore modifying headers!
Pertanyaan yang Sering Diajukan
Apakah pelajaran “Memblokir Permintaan Jaringan” gratis?
Ya — teks lengkap “Memblokir Permintaan Jaringan” gratis dibaca di sini di web. Untuk praktiknya secara interaktif (editor kode bawaan dan tutor AI 24/7) dan buka sisa kursus Browser Extensions Development (Chrome & Edge), upgrade ke CoddyKit PRO. Kursus Browser Extensions Development (Chrome & Edge) mencakup 4 pelajaran total.
Apa yang akan aku pelajari di “Memblokir Permintaan Jaringan”?
Pelajari cara menentukan aturan untuk memblokir permintaan jaringan yang tidak diinginkan, seperti iklan atau skrip pelacakan, menggunakan `declarativeNetRequest`. Kamu berlatih Browser Extensions Development (Chrome & Edge) dengan kode praktik yang langsung kamu jalankan di browser, dan tutor AI 24/7 menjawab pertanyaanmu saat kamu mengerjakan pelajaran ini.
Apakah aku perlu pengalaman untuk memulai Browser Extensions Development (Chrome & Edge)?
Tidak diperlukan pengalaman sebelumnya. Browser Extensions Development (Chrome & Edge) di CoddyKit dirancang untuk pemula hingga pelajar tingkat lanjut, jadi kamu bisa memulai di sini atau dari awal dan belajar sesuai kecepatan kamu sendiri. Ini adalah pelajaran 1 dari 4.
Berapa lama pelajaran “Memblokir Permintaan Jaringan” memakan waktu?
Sebagian besar pelajaran CoddyKit memakan waktu sekitar 5–10 menit. Setiap pelajaran ringkas dan interaktif, jadi kamu membuat kemajuan stabil dan melanjutkan dari tempat kamu tinggalkan di web dan aplikasi.
Bisakah aku menulis dan menjalankan kode dalam pelajaran Browser Extensions Development (Chrome & Edge) ini?
Ya. Setiap pelajaran Browser Extensions Development (Chrome & Edge) menyertakan editor kode bawaan, jadi kamu menulis dan menjalankan kode nyata langsung di browser dan mendapatkan umpan balik AI instan — tidak diperlukan penyiapan lokal.
Semua pelajaran dalam kursus ini
- Memblokir Permintaan Jaringan
- Mengubah Header Permintaan
- Mengalihkan dan Menulis Ulang URL
- Aturan Dinamis dan Penelusuran Kesalahan declarativeNetRequest