CODEWITHSUNDEEP
javascripttampermonkeyuserscripts
Bazooka Express
Bazooka Express

Reputation: 31

Trying to press enter key in canvas every 1 seconds using a userscript

I am trying to create an userscript (to use with tampermonkey) which simulates pressing the Enter button every 1 seconds.

I have tried 

// ==UserScript==
// @name         Userscript
// @namespace    http://tampermonkey.net/
// @require        https://ajax.googleapis.com/ajax/libs/jquery/1.6.0/jquery.min.js
// @version      0.1
// @description  desc
// @author       author
// @match        https://example.com/*
// @grant        none
// ==/UserScript==


setInterval(() => 
    document.body.dispatchEvent(new KeyboardEvent("keypress", {keyCode : 13}))
, 250);

However, the keypress does not seems to works...

The body of the page contains a canvas with the id gCanvas and multiples iframes used for ads (which are, I guess, irrelevant since I use an adblocker).

Let me know if I should add a screen of the DOM of the page from the developping tools.

E : in answer to CertainPerformance comment, I've also tried 

document.getElementById('gCanvas').dispatchEvent(new KeyboardEvent("keypress", {keyCode : 13}))

without result, I also tried with keydown and keyup event but still without results

Upvotes: 3

Views: 1008

Answers (1)

Ahed Kabalan
Ahed Kabalan

Reputation: 855

var elem = document.getElementById('canvas');
var ctx = elem.getContext("2d");
ctx.fillStyle = "#FF0000";
ctx.fillRect(0, 0, 200, 200);

window.addEventListener("keydown", function(e) {  console.log(e.key); }, true);

var evt = new KeyboardEvent("keydown", {key : "Enter"});
evt.keyCode = 13;

setInterval(() => {

      elem.dispatchEvent(evt);
}, 1000);
<canvas id="canvas" width="200px" height="200px"></canvas>

Upvotes: 2

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