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Inject Javascript into almost any website.
// ==UserScript==
// @name InjectJS
// @namespace http://github.com/YTXaos/InjectJS
// @version 1.30
// @description Inject Javascript into almost any website.
// @description:es Inyecte Javascript en casi cualquier sitio web
// @description:fr Injectez Javascript dans presque tous les sites Web
// @description:de Fügen Sie Javascript in fast jede Website ein
// @description:ja ほぼすべてのウェブサイトにジャバスクリとを挿入する
// @description:la Javascript in inject paene omnem website
// @description:ru Внедрите Javascript практически в любой веб-сайт
// @author YTXaos
// @match *://*/*
// @match file:///*
// @icon https://raw.githubusercontent.com/YTXaos/InjectJS/main/assets/logo.png
// @grant GM_addElement
// @grant GM_getResourceText
// @grant GM_getResourceURL
// @license MIT
// @require https://code.jquery.com/jquery-3.6.0.min.js
// @resource MainCSS https://raw.githubusercontent.com/YTXaos/InjectJS/main/assets/main.css
// @resource OptionsHTML https://raw.githubusercontent.com/YTXaos/InjectJS/main/pages/options.html
// @resource OptionsJS https://raw.githubusercontent.com/YTXaos/InjectJS/main/options.js
// @resource Fontawesome https://raw.githubusercontent.com/YTXaos/InjectJS/main/assets/fontawesome.css
// @resource MainIcon https://raw.githubusercontent.com/YTXaos/InjectJS/main/assets/logov2.png
// ==/UserScript==
(function() {
"use strict";
const url = location.href,
origin = location.origin;
/**
* @param {string} item Specify what item to look for in the options.
* @returns {string} True or false if found, false boolean if not.
*/
function Option(item) {
if(localStorage.getItem(`inject-js:${item}`)) {
return localStorage.getItem(`inject-js:${item}`).toString();
} else {
return false;
}
}
/**
* Create a log node.
* @param {string} type The type of log to create.
* @param {string} msg The message to output in the logs.
*/
function createLog(type, msg) {
const elm = document.querySelector(".js-injector-logs");
let msg_type;
type === "warning" && (msg_type = "WARN") || (msg_type = type.toUpperCase());
elm.innerHTML += `
<div class="js-log ${type}">
[InjectJS <span class="time-date"></span> ${msg_type}]:
<span class="js-log-message">
${msg}
</span>
</div>`;
}
const logs = {
info(msg) { createLog("info", msg); },
warn(msg) { createLog("warning", msg); },
error(msg) { createLog("error", msg); }
}
/**
* Check whether the page the user is on is equivalent to param "page".
* @param {string} page Specify what URL to check for.
* @param {boolean} exact Whether it should check for the exact URL or relative.
* @returns {boolean} True or false
*/
function onURL(page, exact) {
if(exact) {
return url === `${origin}${page}`;
} else {
return url.includes(page);
}
}
if(Option("disable") == "true") {
document.addEventListener("keyup", function(e) {
e.preventDefault();
if(e.ctrlKey && e.key === ".") {
localStorage.setItem("inject-js:disable", false);
location.reload();
}
});
return;
}
if(onURL("/inject-js/", true)) {
location = "https://github.com/YTXaos/InjectJS";
}
Option("startup_log") == "true" && (console.info("InjectJS Loaded. Press Ctrl + Q to topen"));
const popup = document.createElement("div"),
log = document.createElement("div");
GM_addElement(document.head, "style", { textContent: GM_getResourceText("MainCSS") });
log.setAttribute("class", "js-injector-logs");
log.innerHTML = '<span class="js-logs-close" title="Close" id="js-close">×</span>';
log.style.display = "none";
popup.setAttribute("class", "js-injector-popup");
popup.style.display = "none";
popup.innerHTML = `<label class="js-inject-header">
<div class="js-logo-needle" style="background-image: url(${GM_getResourceURL("MainIcon")})">.....</div>
Inject<span class="js-logo">JS</span>
</label>
<textarea placeholder="Your code here" class="js-code-inject" spellcheck="false" data-gramm="false" data-gramm_editor="false" data-enable-grammarly="false" id="js-code-inject"></textarea>
<div class="js-btns-section">
<button class="execute-code" disabled>Execute</button>
<button class="js-options-btn">Options</button>
</div>
<div class="js-btns-column">
<button class="show-js-logs">Logs</button>
</div>`;
document.body.append(log);
document.body.prepend(popup);
function OptionsPage() {
$("link[rel=stylesheet], style, script").remove();
document.title = "InjectJS Options";
document.body.innerHTML = GM_getResourceText("OptionsHTML");
GM_addElement(document.head, "script", { textContent: GM_getResourceText("OptionsJS") });
}
const code = document.querySelector(".js-code-inject"),
btn = document.querySelector(".execute-code"), option_btn = document.querySelector(".js-options-btn"), log_btn = document.querySelector(".show-js-logs");
code.addEventListener("input", CheckCode);
log_btn.addEventListener("click", function() {
document.querySelector(".js-injector-logs").setAttribute("style", "display: flex !important");
document.getElementById("js-close").addEventListener("click", function() {
document.querySelector(".js-injector-logs").setAttribute("style", "");
});
});
if(Option("disable_syntax") != "true") { code.addEventListener("keydown", Syntax); }
btn.addEventListener("click", InjectCode);
option_btn.addEventListener("click", () => { location = "/inject-js/options"; });
/**
* Syntax properties for autocomplete "(", "{", and strings.
* @param {event} e Returns an event to handle accordingly.
*/
function Syntax(e) {
if(e.key === "{") {
e.preventDefault();
const start = code.selectionStart,
end = code.selectionEnd,
selection = code.value.substring(start, end),
replace = `${code.value.substring(0, start)}{\n${selection}\n}${code.value.substring(end)}`;
code.value = replace;
code.focus();
code.selectionEnd = end + 2;
}
if(e.key === "(") {
e.preventDefault();
const start = code.selectionStart,
end = code.selectionEnd,
selection = code.value.substring(start, end),
replace = `${code.value.substring(0, start)}(${selection})${code.value.substring(end)}`;
code.value = replace;
code.focus();
code.selectionEnd = end + 1;
}
if(e.which === 222) {
e.preventDefault();
const start = code.selectionStart,
end = code.selectionEnd,
selection = code.value.substring(start, end),
replace = `${code.value.substring(0, start)}${e.key}${selection}${e.key}${code.value.substring(end)}`;
code.value = replace;
code.focus();
code.selectionEnd = end + 1;
}
}
function CheckCode() {
const code = document.querySelector(".js-code-inject");
if(code.value.length < 5) {
btn.setAttribute("disabled", "disabled");
} else {
btn.removeAttribute("disabled");
}
}
function InjectCode() {
try {
eval(code.value);
} catch (e) {
if(Option("alert_errors") == "true") {
alert(e.message);
} else {
logs.error(e);
}
}
}
function ShowInjector() {
dragElement(document.querySelector(".js-injector-popup"));
/**
* Makes an elemenet draggable around the screen.
* @param {string} elmnt Select an element from the DOM to become draggable
*/
function dragElement(elmnt) {
var pos1 = 0,
pos2 = 0,
pos3 = 0,
pos4 = 0;
if(document.querySelector(".js-inject-header")) {
document.querySelector(".js-inject-header").onmousedown = dragMouseDown;
} else {
elmnt.onmousedown = dragMouseDown;
}
function dragMouseDown(e) {
e = e || window.event;
e.preventDefault();
pos3 = e.clientX;
pos4 = e.clientY;
document.onmouseup = closeDragElement;
document.onmousemove = elementDrag;
}
function elementDrag(e) {
e = e || window.event;
e.preventDefault();
pos1 = pos3 - e.clientX;
pos2 = pos4 - e.clientY;
pos3 = e.clientX;
pos4 = e.clientY;
elmnt.style.top = (elmnt.offsetTop - pos2) + "px";
elmnt.style.left = (elmnt.offsetLeft - pos1) + "px";
}
function closeDragElement() {
document.onmouseup = null;
document.onmousemove = null;
}
}
popup.classList.toggle("show");
}
if(onURL("/inject-js/options", true)) {
OptionsPage();
}
document.addEventListener("keyup", function(e) {
e.preventDefault();
if(e.ctrlKey && e.key === "q") {
ShowInjector();
}
});
})();