How to get the name of the YouTube channel in Tampermonkey

Prerequisites/What you want to achieve

I want to be able to see only certain channels on youtube, so I try to get the name of the youtube channel on Tampermonkey (Javascript) and move the code to close the window if it doesn't fit the whitelist.
I wanted to divert the tampermonkey cord because it was rolling, but it didn't work properly.

Problems/Error Messages you are experiencing

With the code below,

var testString=$(".yt-user-info")[0].firstElementChild.innerHTML;

does not work, and the code stops there (no errors in particular)

Source Codes Affected

//==UserScript==
// @name Youtube Whitelist Script
// @namespace http://tampermonkey.net/
// @version0.1b
// @description This script will remove the content from YouTube videos. Ignores whitelisted content
// @author Louis Vaught
// @ match https://www.youtube.com/watch*
// @copyright2017, Louis Vaught
// @require https://code.jquery.com/jquery-latest.js
// ==/UserScript==

var$=window.jQuery;
///////////////////////
// EDIT WHITELIST HERE:
///////////////////////

varwhitelist=[
'The Backyard Scientist',
'Cody\'sLab',
"The Slo Mo Guys".
];
// Make sure to match the name exact. Not case-sensitive.

//////////////////////////
// String Search Function:
//////////////////////////

function searchStringInArray(str, strArray){
for(varj=0;j<strArray.length;j++){
vartestStr=strArray[j].toLowerCase();
varmatchStr=str.toLowerCase();
if(testStr.match(matchStr)) return j;
}
return-1;
}

////////////////////
// Main Script Body:
////////////////////

$(document).ready(function(){
alert("main kokokara")
// Find the channel name on the page
vartestString=$(".yt-user-info")[0].firstElementChild.innerHTML;
//    vartestString="hogehoge"
alert(testString)
// Search for the channel name in the array
varsearchVal=searchStringInArray(testString, whitelist);
// If the channel isn't present, then delete content and error out:
if(searchVal==-1){
$("#page-container").remove();
alert("This channel is not on the YouTube whitelist!");
}
});

Tried

At the top of the cord

//@require http://code.jquery.com/jquery-latest.js
var$=window.jQuery;

I think I can use jQuery (no error) because it is specified as
I may not be able to use it.

I would appreciate it if you could let me know if there are any mistakes in the code or how to use jQuery.
Thank you for your cooperation.

javascript jquery youtube

2022-09-30 21:54

1 Answers

I'm sorry that I didn't mention that it's multi-post.
It has been resolved on the following website.
https://teratail.com/questions/320591#

2022-09-30 21:54

If you have any answers or tips

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